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7 7.0

A Hard X-ray Study of the Normal Star-Forming Galaxy M83 with NuSTAR

Jun 29, 2018 06/18

by M. Yukita; A. E. Hornschemeier; B. D. Lehmer; A. Ptak; D. R. Wik; A. Zezas; V. Antoniou; T. J. Maccarone; V. Replicon; J. B. Tyler; T. Venters; M. K. Argo; K. Bechtol; S. Boggs; F. E. Christensen; W. W. Craig; C. Hailey; F. Harrison; R. Krivonos; K. Kuntz; D. Stern; W. W. Zhang

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We present results from sensitive, multi-epoch NuSTAR observations of the late-type star-forming galaxy M83 (d=4.6 Mpc), which is the first investigation to spatially resolve the hard (E>10 keV) X-ray emission of this galaxy. The nuclear region and ~ 20 off-nuclear point sources, including a previously discovered ultraluminous X-ray (ULX) source, are detected in our NuSTAR observations. The X-ray hardnesses and luminosities of the majority of the point sources are consistent with hard X-ray...
Topics: Astrophysics, High Energy Astrophysical Phenomena, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1604.07441

Arxiv.org

4 4.0

A resolved map of the infrared excess in a Lyman Break Galaxy at z=3

Jun 29, 2018 06/18

by M. P. Koprowski; K. E. K. Coppin; J. E. Geach; N. K. Hine; M. Bremer; S. C. Chapman; L. J. M. Davies; T. Hayashino; K. K. Knudsen; M. Kubo; B. D. Lehmer; Y. Matsuda; D. J. B. Smith; P. P. van der Werf; G. Violino; T. Yamada

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We have observed the dust continuum of ten z=3.1 Lyman Break Galaxies with the Atacama Large Millimeter/Submillimeter Array at ~450 mas resolution in Band 7. We detect and resolve the 870um emission in one of the targets with an integrated flux density of S(870)=(192+/-57) uJy, and measure a stacked 3-sigma signal of S(870)=(67+/-23) uJy for the remaining nine. The total infrared luminosities estimated from full spectral energy distribution fits are L(8-1000um)=(8.4+/-2.3)x10^10 Lsun for the...
Topics: Astrophysics, Cosmology and Nongalactic Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1608.05080

Arxiv.org

6 6.0

ALMA observations of a z~3.1 Protocluster: Star Formation from Active Galactic Nuclei and Lyman-Alpha Blobs in an Overdense Environment

Jun 29, 2018 06/18

by D. M. Alexander; J. M. Simpson; C. M. Harrison; J. R. Mullaney; I. Smail; J. E. Geach; R. C. Hickox; N. K. Hine; A. Karim; M. Kubo; B. D. Lehmer; Y. Matsuda; D. J. Rosario; F. Stanley; A. M. Swinbank; H. Umehata; T. Yamada

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We exploit ALMA 870um observations to measure the star-formation rates (SFRs) of eight X-ray detected Active Galactic Nuclei (AGNs) in a z~3.1 protocluster, four of which reside in extended Ly-alpha haloes (often termed Ly-alpha blobs: LABs). Three of the AGNs are detected by ALMA and have implied SFRs of ~220-410~M_sun/yr; the non detection of the other five AGNs places SFR upper limits of 100 kpc) do not host more luminous star formation than the smaller LABs, despite being an order of...
Topics: Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1601.00682

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