Folkscanomy Miscellaneous
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Dec 30, 2015
12/15
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Ecole d'été de physique théorique (Les Houches, Haute-Savoie, France) (70th : 1998); Casoli, F. (Fabienne), 1959-; Lequeux, James; David, F. (François); North Atlantic Treaty Organization. Scientific Affairs Division; NATO Advanced Study Institute (1998 : Les Houches, Haute-Savoie, France)
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Astronomie spatiale infrarouge, aujourd’hui et demain Infrared space astronomy, today and tomorrow Author: F. Casoli, J. Lequeux, F. David Published by Springer Berlin Heidelberg ISBN: 978-3-540-67386-6 DOI: 10.1007/3-540-45573-6 Table of Contents: Some Quantitative Aspects of Galactic and Extragalactic Infrared Astronomy Overview of the ISO Mission Data Analysis with ISOCAM ISO Observations of Solar-System Objects Stars and Galactic Structure Star Formation Dust in the Interstellar Medium...
Topic: Infrared astronomy
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45
Mar 19, 2010
03/10
by
Fullmer, L; Lonsdale Perrson, Carol J
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Prepared under the supervision of the Joint IRAS Science Working Group (JISWG)
Topics: Infrared astronomy, IRAS
3
3.0
Sep 23, 2021
09/21
by
Canary Islands Winter School on Astrophysics (4th : 1992 : Playa de las Americas, Canary Islands)
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xi, 415 p. : 26 cm
Topic: Infrared astronomy -- Congresses
8
8.0
May 19, 2021
05/21
by
Rowan-Robinson, Michael
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x, 251 pages,16 pages of plates : 24 cm
Topics: Infrared astronomy, SCIENCE / Astronomy
Folkscanomy Miscellaneous
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299
Dec 30, 2015
12/15
by
Lemke, D; Stickel, M. (Manfred), 1959-; Wilke, K. (Karsten), 1969-
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ISO Surveys of a Dusty Universe: Proceedings of a Ringberg Workshop Held at Ringberg Castle, Tegernsee, Germany, 8–12 November 1999 Author: D. Lemke, M. Stickel, K. Wilke Published by Springer Berlin Heidelberg ISBN: 978-3-540-67479-5 DOI: 10.1007/3-540-45553-1 Table of Contents: The ISO Mission and Its Surveys A New Population of Faint Starburst Galaxies Revealed by 15 μm ISOCAM Deep Surveys Mid-Infrared Properties of Distant Cluster Galaxies as Revealed by ISOCAM The European Large Area...
Topics: Infrared Space Observatory, Infrared astronomy
529
529
May 22, 2011
05/11
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Hirsch, David; Johnson, Harr
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The NASA Lewis Research Center requested NASA Johnson Space Center White Sands Test Facility to conduct flammability, odor, offgassing, thermal vacuum stability, and compatibility tests with aerospace fluids of several wire insulations.
Topics: ASTRONOMICAL CATALOGS, FAR INFRARED RADIATION, INFRARED ASTRONOMY, INFRARED ASTRONOMY SATELLITE,...
482
482
May 31, 2011
05/11
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Landis, Geoffrey A
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A major objective for NASA exploration of Mars is to determine whether life has existed on Mars in the past, and whether such life on Mars may persist to the present day. On Earth, life exists in all niches in which water exists in liquid form for at least a portion of the year. On Mars, any liquid water would have to be a highly concentrated brine solution. It is likely, therefore, that any present-day Martian microorganisms would be similar to terrestrial halophiles.
Topics: MILKY WAY GALAXY, HALOS, EMISSION, VARIATIONS, INFRARED ASTRONOMY, INFRARED ASTRONOMY SATELLITE,...
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10.0
Dec 4, 2019
12/19
by
Allen, David A., 1946-
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228 pages : 22 cm
Topics: Astronomie infrarouge, Infrared astronomy, Infraroodastronomie, Infrarot-Spektrum, Astronomie
197
197
May 31, 2011
05/11
by
Burner, A. W.; Liu, Tianshu; DeLoach, Richar
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The uncertainty of videogrammetric techniques used for the measurement of static aeroelastic wind tunnel model deformation and wind tunnel model pitch angle is discussed. Sensitivity analyses and geometrical considerations of uncertainty are augmented by analyses of experimental data in which videogrammetric angle measurements were taken simultaneously with precision servo accelerometers corrected for dynamics. An analysis of variance (ANOVA) to examine error dependence on angle of attack,...
Topics: INFRARED ASTRONOMY, ALGORITHMS, INFRARED ASTRONOMY SATELLITE, IMAGE PROCESSING, SKY SURVEYS...
In this period the first maps were made during two flights of the Kuipper Airborne Observatory (KAO) in January 1986. One of these shows extended emission at 100 and 160 microns from the dense core B35 containing the IRAS point source 05417+0907. The 160 micron emission has approximately the same extent as the NH3 (1,1) line emission at 1.4 cm, indicating close correspondence between the warm dust and the dense gas. The 160 micron map shows a previously unknown secondary maximum about 90 arcsec...
Topics: NASA Technical Reports Server (NTRS), DUST, GASES, INFRARED ASTRONOMY, MAPPING, C-141 AIRCRAFT,...
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4.0
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[3], 62 p., [8] p. of plates, [5] leaves of plates : 30 cm
Topics: Royal Observatory, Edinburgh, Infrared astronomy, Astronomy -- Research -- Great Britain
The objective of this proposal was to measure variations in the 1/4 keV emission from the galactic halo, using ROSAT (x-ray astronomy satellite) Position Sensitive Proportional Counters (PSPC) observations toward known enhancements in the absorbing column density along the line-of-sight out of the Galaxy. Target directions were selected to have a low total hydrogen column density but to also show significant gradients in the amount of absorbing material, as traced by Infrared Astronomical...
Topics: NASA Technical Reports Server (NTRS), MILKY WAY GALAXY, HALOS, EMISSION, VARIATIONS, INFRARED...
A typical pointed observation in the Infrared Astronomical Satellite (IRAS) was designed to fit into a 15 minute window. Observing constraints, however, did not always permit targets from the scientific program to be observed on exactly 15 minute centers and a few months into the mission it was realized that the automatic scheduling program left times when no observations were being made. In order to use this potentially wasted observing time, a mode of pointed observations, the 'filler' mode,...
Topics: NASA Technical Reports Server (NTRS), FAINT OBJECTS, GALAXIES, INFRARED ASTRONOMY SATELLITE,...
The joint effort is reported of scientists and engineers from the Netherlands, the United Kingdom, and the United States working as a team for the purpose of exploring the possibility of a cooperative venture. The proposed mission builds upon experience gained from the successful Astronomical Netherlands Satellite (ANS). This satellite will be in a polar orbit at an altitude of 900 km. It will carry an 0.6 m diameter telescope cooled with helium to a temperature near 10K. An array of...
Topics: NASA Technical Reports Server (NTRS), ASTRONOMICAL SPECTROSCOPY, INFRARED ASTRONOMY SATELLITE,...
One of the most important discoveries of the Infrared Astronomical Satellite (IRAS) has been the detection of about 20,000 galaxies with 60 microns fluxes above 0.5 Jy. From the observational point of view, the IRAS galaxies are ideal tracers of density, since they are homogeneously detected over most of the sky, and their fluxes are unaffected by galactic extinction. The nearby universe was mapped by the IRAS galaxies to a distance of approximately 200 h(exp -1) Mpc for the absolute value of b...
Topics: NASA Technical Reports Server (NTRS), DENSITY (NUMBER/VOLUME), GALAXIES, INFRARED ASTRONOMY...
14
14
Nov 13, 2018
11/18
by
None
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216 pages : 25 cm
Topics: Infrared astronomy -- Congresses, Gamma ray astronomy -- Congresses, Gamma ray astronomy, Infrared...
The Final Technical Report covering the period from 15 Aug. 1989 to 14 Aug. 1991 is presented. Areas of research included Infrared Astronomy Satellite (IRAS) high resolution studies and modeling of closely interacting galaxies; galaxy collisions: infrared observations and analysis of numerical models; and UV spectroscopy of massive young stellar populations in interacting galaxies. Both observational studies and theoretical modelling of interacting galaxies are covered. As a consequence the...
Topics: NASA Technical Reports Server (NTRS), COLLISIONS, INFRARED ASTRONOMY, INTERACTING GALAXIES,...
I have examined all Infrared Astronomical Satellite (IRAS) data relevant to the 173 Galactic Wolf-Rayet (W-R) stars in an updated catalog, including the 13 stars newly discovered by Shara and coworkers. Using the W-R coordinates in these lists, I have examined the IRAS Point Source Catalog (PSC), the Faint Source Catalog, and the Faint Source Reject Catalog, and have generated one-dimensional spatial profiles ('ADDSCANs') and two-dimensional full-resolution images ('FRESCOs'). The goal was to...
Topics: NASA Technical Reports Server (NTRS), WOLF-RAYET STARS, LATE STARS, SKY SURVEYS (ASTRONOMY),...
The Large Deployable Reflector (LDR) is a telescope designed to carry out high-angular resolution, high-sensitivity observations at far-infrared and submillimeter wavelengths. The scientific rationale for the LDR is discussed in light of the recent Infrared Astronomical Satellite (IRAS) and Kuiper Airborne Observatory (KAO) results and the several new ground-based observatories planned for the late 1980s. The importance of high sensitivity and high angular resolution observations from space in...
Topics: NASA Technical Reports Server (NTRS), INFRARED ASTRONOMY, INFRARED TELESCOPES, LARGE DEPLOYABLE...
The author summarized certain aspects of the conference. He shares this task with another colleague thereby breaking the task into more manageable proportions. The author covers the low luminosity sources. He begins his review with a summary of some major themes of the conference and ends with a few speculations on possible theoretical mechanisms.
Topics: NASA Technical Reports Server (NTRS), GALACTIC NUCLEI, LUMINOUS INTENSITY, STAR FORMATION, B STARS,...
Five hundred and fifty six stars in the IRAS PSC-2 that are suitable for stellar radiometric standards and are brighter than 1 Jy at 25 microns were identified. In addition, 123 stars that meet all of our criteria for calibration standards, but which lack a luminosity class were identified. An approach to absolute stellar calibration of broadband infrared filters based upon new models of Vega and Sirius due to Kurucz (1992) is presented. A general technique used to assemble continuous wide-band...
Topics: NASA Technical Reports Server (NTRS), CALIBRATING, INFRARED ASTRONOMY, INFRARED SPECTRA, STELLAR...
Data processing techniques useful for infrared astronomy data analysis systems are reported. This investigation is restricted to consideration of data from space-based telescope systems operating as survey instruments. In this report the theoretical background for specific point-source detection schemes is completed, and the development of specific algorithms and software for the broad range of requirements is begun.
Topics: NASA Technical Reports Server (NTRS), CORRELATION DETECTION, INFRARED ASTRONOMY, POINT SOURCES,...
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210
Jun 2, 2011
06/11
by
Blanken, Christopher L.; Arterburn, David R.; Cicolani, Luigi S
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The U.S. Army's Aeronautical Design Standard- 33 (ADS-33D-PRF) is a rotorcraft handling-qualities specification that was developed at Ames. Because this specification was initially applied in the RAH-66 Comanche helicopter program, the requirements generally related more to scout and attack rotorcraft. Recently, Ames expanded its handling-qualities research work to include utility rotorcraft, with and without externally slung loads. As part of this research, an 80-hour flight-test assessment of...
Topics: SOFIA (AIRBORNE OBSERVATORY), INFRARED SPECTROMETERS, AIRBORNE EQUIPMENT, INFRARED ASTRONOMY,...
The WISE spacecraft is readied for its mission to scan space with a specialized infrared telescope. If a recognizable person appears in this video, use for commercial purposes may infringe a right of privacy or publicity. It may not be used to state or imply the endorsement by NASA employees of a commercial product, process or service, or used in any other manner that might mislead. Accordingly, it is requested that if this video is used in advertising and other commercial promotion, layout and...
Topics: What -- WISE, WISE, NASA, Delta Rocket, Delta Launch, WISE Launch, Infrared Astronomy
Source: http://youtu.be/3ZMXEjufCmY
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294
May 22, 2011
05/11
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Delsolmesa, Antonio; Martinezyromero, R. P
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In this paper we discuss the Dirac Oscillator wave equation in terms of pseudoclassical language, using Grassmann variables to describe the internal degrees of freedom of the oscillator. Regarding the original wave equation as a classical constraint, we use the theory of constrained systems, to develop a reparameterization invariant lagrangian, which is the pseudoclassical equivalent of the quantum case. The consistency of the Hamiltonian formalism and the quantization procedure are also...
Topics: IMAGE PROCESSING, FOURIER TRANSFORMATION, KOLMOGOROV THEORY, SCALE MODELS, SPATIAL RESOLUTION,...
In 1993 we proposed a project to NASA having the goal of producing a new infrared map of our Galaxy. In particular, we proposed to reprocess the IRAS data taken in the early 1980's using modern image processing algorithms and the large Intel parallel computers of the Center for Advanced Computing Research, (at that time called the Caltech Concurrent Supercomputing Facilities - CCSF). The rationale was simple: what took approximately 100 days on a typical workstation would take less than a day...
Topics: NASA Technical Reports Server (NTRS), INFRARED ASTRONOMY, ALGORITHMS, INFRARED ASTRONOMY SATELLITE,...
We discuss procedures, limitations and results of high resolution processing of interacting galaxies observed by the Infrared Astronomical Satellite (IRAS). Among 56 potentially resolvable interacting groups selected from the IRAS Bright Galaxy Sample, 22 systems have been resolved yielding fluxes for a total of 51 galaxies. In about 2/3 of the resolved pairs, both galaxies were detected in the far-infrared. A set of isolated non-interacting galaxies was chosen from the Bright Galaxy Sample for...
Topics: NASA Technical Reports Server (NTRS), INFRARED ASTRONOMY, INFRARED ASTRONOMY SATELLITE, INTERACTING...
In this proposal, we seek to apply the optical/thermal method to the measurement of the diameters and albedos of a large sample of Near Earth Objects (NEOs). Whereas main-belt asteroids have been studied in large numbers, principally using thermal detections from the IRAS satellite, relatively few thermal observations of NEOs have been secured. This program capitalizes on our access to large telescopes and imaging thermal IR detectors in pursuit of the definitive set of albedo data on the NEOs.
Topics: NASA Technical Reports Server (NTRS), NEAR EARTH OBJECTS, THERMODYNAMIC PROPERTIES, OPTICAL...
4
4.0
Sep 23, 2021
09/21
by
Euroconference on Near-Infrared Surveys (3rd : 1997 : Meudon Observatory)
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xii, 282 p. : 25 cm
Topics: Galaxies -- Congresses, Stars -- Congresses, Galaxies -- Catalogs -- Congresses, Stars -- Catalogs...
283
283
Jul 23, 2010
07/10
by
Britcher, Colin P
texts
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A preliminary technical assessment of the feasibility of a demonstration Magnetic Levitation system, required to support aerodynamic models with a specified clear air volume around them, is presented. Preliminary calculations of required sizes of electromagnets and power supplies are made, indicating that the system is practical. Other aspects, including model position sensing and controller design, are briefly addressed.
Topics: CONFERENCES, EMISSION SPECTRA, FAR INFRARED RADIATION, H ALPHA LINE, INFRARED ASTRONOMY SATELLITE,...
Infrared Astronomy Satellite (IRAS) sources found within 4 degrees of l = 125 deg, b = 2 deg on the 3rd HCON 60 micron Sky Brightness Images were observed at the Very Large Array (VLA). Regions were to be identified where massive stars are forming by looking for small areas of radio continuum emissions. The IRAS sources could be divided into three groups by their IRAS 12 micron/25 micron and 60 micron/100 micron color. The group identified with star forming regions contained essentially all of...
Topics: NASA Technical Reports Server (NTRS), INFRARED ASTRONOMY, MORPHOLOGY, RADIO ASTRONOMY, SKY...
The discovery of the so-called Vega phenomenon was one of the most important and unexpected results of the IRAS mission. Several nearby main sequence stars were found to possess clouds of solid grains emitting strongly in the far-IR. Three of these objects were marginally resolved by IRAS. This phenomenon appears to be widespread and not limited to proto-planetary epochs. Possible connection of this phenomenon to the existing of planets is discussed.
Topics: NASA Technical Reports Server (NTRS), INFRARED ASTRONOMY SATELLITE, MAIN SEQUENCE STARS, SATELLITE...
Infrared Astronomy Satellite measurements at 25, 60 and 100 microns were used to analyze the infrared properties of Seyfert galaxies from the Markarian and NGC Catalogs. One hundred and sixteen of 186 Seyfert galaxies were detected. About 50% of all Seyfert galaxies in the sample have 60 micron luminosities in excess of 10 to the 10th power solar luminosity, and the mean 60 micron luminosity increase with the optical B absolute magnitude. The luminosity functions of the Seyfert 1 and Seyfert 2...
Topics: NASA Technical Reports Server (NTRS), GALACTIC RADIATION, INFRARED SPECTRA, LUMINOSITY, SEYFERT...
Using IRAS in a slow scan observing mode to increase the spatial sampling rate and a deconvolution analysis to increase the spatial resolution, several bright galaxies were resolved at 60 micron. Preliminary results for M 82, NGC 1068, NGC 3079 and NGC 2623 show partially resolved emission from 10 to 26 arcsec., full width at half maximum, and extended emission from 30 to 90 arcsec. from the center. In addition, the interacting system, Arp 82, along with Mark 231 and Arp 220 were studied using...
Topics: NASA Technical Reports Server (NTRS), GALACTIC NUCLEI, INFRARED ASTRONOMY, LUMINOUS INTENSITY,...
Using new High Resolution far-infrared (FIR) images we have determined FIR flux densities, the FIR luminosity, and intensity profiles along the major axis for eight nearby edge-on spiral galaxies. We present spatial comparisons between the FIR profiles in three of the four IRAS Bands (25, 60, 100 microns). We also present direct spatial comparisons between the 60 micron intensity profiles and intensity profiles from 20 cm radio continuum maps with identical resolution (approx. 60 sec) obtained...
Topics: NASA Technical Reports Server (NTRS), CONTINUUMS, FAR INFRARED RADIATION, INFRARED ASTRONOMY,...
A large portion of the inner galactic plane has been mapped in the far-infrared (C II) line using a balloon-borne survey instrument. Complete coverage is reported from 25 degrees north to 80 degrees south of the galactic center and extending a few degrees on each side of the plane. Effective resolution is 14.1 acrmin (FWHM) and contour levels begin at 2 E -5 ergs/(s x sq. cm x ster). When compared with 100 micron dust emission observed by IRAS the (C II) appears well correlated with the dust...
Topics: NASA Technical Reports Server (NTRS), CARBON, COSMIC DUST, EMISSION SPECTRA, FAR INFRARED...
An investigation of the infrared emission energetics and embedded population in the rho Ophiuchi dark cloud is summarized. With a distance of approximately 140 pc, the rho Ophiuchi cloud is one of the closest regions of recent star formation. It is also one of the best studied such regions with numerous observations at all wavelengths. The IRAS data of the cloud provided a new glimpse of the overall structure of the cloud. In particular, the interaction of radiation from the Sco-Oph OB...
Topics: NASA Technical Reports Server (NTRS), INFRARED ASTRONOMY, INFRARED ASTRONOMY SATELLITE, INFRARED...
Infrared Astronomy Satellite (IRAS) observations of the neighborhoods of six outer-Galaxy HII regions were combined with CO observations to show that most of the far infrared (FIR) luminosity from within approximately 25 to 75 pc of the ionizing stars is contributed by dust in molecular clouds, not by dust in the low-density ionized gas. Dust associated with the clouds is warmed by absorption of UV and visible light from the cluster of stars responsible for the ionization. Most of the OB...
Topics: NASA Technical Reports Server (NTRS), DUST, GALACTIC STRUCTURE, INFRARED ASTRONOMY, MOLECULAR...
The IRAS survey gives an unbiased view of the infrared properties of the active galaxies. Seyfert galaxies occupy much the same area in color-color plots as to normal infrared bright galaxies, but extend the range towards flatter 60 to 25 mm slopes. Statistically the Seyfert 1 galaxies can be distinguished from the Seyfert 2 galaxies, lying predominantly closer to the area with constant slopes between 25 and 200 mm. The infrared measurements of the Seyfert galaxies cannot distinguish between...
Topics: NASA Technical Reports Server (NTRS), ACTIVE GALAXIES, GALACTIC NUCLEI, INFRARED ASTRONOMY, SEYFERT...
The author discusses the morphology of luminous Infrared Astronomy Satellite (IRAS) galaxies. A few comments are made about the direction to be taken in future observations of luminous IRAS galaxies.
Topics: NASA Technical Reports Server (NTRS), GALACTIC NUCLEI, GALACTIC STRUCTURE, INFRARED RADIATION,...
314
314
May 29, 2011
05/11
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Garrison, James L.; Ruffini, Giulio; Rius, Antonio; Cardellach, Estelle; Masters, Dallas; Armathys, Michael; Zavorotny, Valer
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An experiment to collect bistatically scattered GPS signals from a balloon at 37 km altitude has been conducted. This experiment represented the highest altitude to date that such signals were successfully recorded. The flight took place in August 1999 over the Mediterranean sea, between a launch in Sicily and recovery near Nerpio, a town in the Sierra de Segura, Albacete province of Huelva, Spain. Results from this experiment are presented, showing the waveform shape as compared to theoretical...
Topics: BACKGROUND RADIATION, GALACTIC HALOS, INTERSTELLAR MATTER, SHADOWS, INFRARED ASTRONOMY SATELLITE,...
645
645
Jul 9, 2010
07/10
by
YEH Y. M
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The Schottky barrier solar cell is considered a possible candidate for converting solar to electrical energy both for space and terrestrial applications. Knowledge of the optical constants of the ultrathin metal film used in the cell is essential for analyzing and designing higher efficiency Schottky barrier cells. The optical constants of 7.5 -nm (75-A) gold films on gallium arsenide have been obtained. In addition, the absolute collection efficiency of Schottky barrier solar cells has been...
Topics: INFRARED ASTRONOMY, METEOROLOGICAL PARAMETERS, CLOUD COVER, ELECTROMAGNETIC NOISE, SKY BRIGHTNESS,...
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232
Jul 25, 2010
07/10
by
Toon, Owen B.; Turco, Richard; Jordan, Josep
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A one dimensional model of cloud microphysics was used to simulate the formation and evolution of polar stratospheric ice clouds. Some of the processes which are included in the model are outlined. It is found that the clouds must undergo preferential nucleation upon the existing aerosols just as do tropospheric cirrus clouds. Therefore, there is an energy barrier between stratospheric nitric acid particles and ice particles implying that nitric acid does not form a continuous set of solutions...
Topics: ALL SKY PHOTOGRAPHY, CATALOGS, INFRARED ASTRONOMY SATELLITE, STARS, COSMOLOGY, GALAXIES,...
A linear correlation was found between the infrared cirrus at 100 or 60 microns and neutral atomic hydrogen near the galactic plane. Infrared Astronomy Satellite (IRAS) Sky Brightness images were compared to the 0.5 deg resolution Weaver-Williams HI survey in two regions of the outer Galaxy near l = 125 deg and l = 215 deg. The dust temperature inferred is nearly uniform and in reasonable agreement with theoretical predictions of thermal dust emission.
Topics: NASA Technical Reports Server (NTRS), BRIGHTNESS TEMPERATURE, DIFFUSE RADIATION, DUST, INFRARED...
This project was carried out over a period of four years, beginning 6/15/89 and continuing through 9/15/93. Intermediate results have been reported as poster papers at several meetings of the American Astronomical Society. A brief summary was presented in April 1993 at a symposium on the infrared cirrus. The final results were published in late 1993. The measurements have been deposited in NASA's Astronomical Data Center. Briefly, the results are as follows: Using the IRAS data base, we...
Topics: NASA Technical Reports Server (NTRS), COSMIC DUST, INFRARED ASTRONOMY, INFRARED CIRRUS (ASTRONOMY),...
The Far Infrared Supplement contains a subset of the data in the full Catalog of Infrared Observations (all observations at wavelengths greater than 4.6 microns). The Catalog of Infrared Observations (CIO), NASA RP-1294, is a compilation of infrared astronomical observational data obtained from an extensive literature search of scientific journals and major astronomical catalogs and surveys. The literature search is complete for years 1965 through 1990 in this Third Edition. The Catalog...
Topics: NASA Technical Reports Server (NTRS), ASTRONOMICAL CATALOGS, FAR INFRARED RADIATION, INFRARED...
Accomplishments under this grant effort include: successful scientific utilization of the IRAS Low Resolution Spectrometer (LRS) database of over 150,000 scans of 7-23 micron spectra for over 50,000 celestial sources; publication in refereed journal of an additional 486 critically evaluated spectra of sources brighter than 20 Jy, completing the LRS ATLAS (Olnon and Raimond 1986 A&A) uniformly to that level, and production of an additional 1,830 critically evaluated spectra of sources...
Topics: NASA Technical Reports Server (NTRS), ASTRONOMICAL CATALOGS, DATA BASES, INFRARED ASTRONOMY,...
The Infrared Astronomical Satellite (IRAS) has given us the first completely unbiased sky-survey in the far-infrared with wavebands centered at 12, 25, 60 and 100 microns. The Taurus-Auriga complex was selected as the first molecular cloud to be investigated in this study. The Taurus clouds were defined as lying between 04h and 05h in R.A. and +16 to +31 degrees in Dec., then the IRAS point-source catalogue was searched for sources with good or moderate quality fluxes in all three of the...
Topics: NASA Technical Reports Server (NTRS), FAR INFRARED RADIATION, INFRARED ASTRONOMY, MOLECULAR CLOUDS,...
At present, visual inspection is the only method for comparing the large-scale morphologies in the distribution of galaxies to those in model universes generated by N-body simulations. To remedy the situation, we have developed a set of three structure functions (S1, S2, S3) that quantify the degree of large-scale prolateness, oblateness, and sphericity/uniformity of a 3-D particle distribution and have applied them to a volume-limited (less than = 4000 km/s) sample of 699 IRAS galaxies with f...
Topics: NASA Technical Reports Server (NTRS), COMPUTERIZED SIMULATION, GALACTIC EVOLUTION, GALAXIES,...
The goal of this project was to develop new tools for the analysis of the structure of densely sampled maps of interstellar star-forming regions. A particular emphasis was on the recognition and characterization of nested hierarchical structure and fractal irregularity, and their relation to the level of star formation activity. The panoramic IRAS images provided data with the required range in spatial scale, greater than a factor of 100, and in column density, greater than a factor of 50. In...
Topics: NASA Technical Reports Server (NTRS), DENSITY DISTRIBUTION, FRAGMENTATION, IMAGE ANALYSIS, INFRARED...
