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  • Penney,University Of Leicester (author)

Cold molecular gas and free-free emission from hot, dust-obscured galaxies at z similar to 3

  • Article/chapterEnglish2020

Publisher, publication year, extent ...

  • 2020-06-06
  • Oxford University Press (OUP),2020

Numbers

  • LIBRIS-ID:oai:research.chalmers.se:0206cadf-98b6-4efb-bb20-0696121a5eed
  • https://research.chalmers.se/publication/518925URI
  • https://doi.org/10.1093/MNRAS/STAA1582DOI
  • https://research.chalmers.se/publication/522575URI
  • https://doi.org/10.1093/mnras/staa1582DOI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • We report on observations of redshifted CO(1-0) line emission and observed-frame similar to 30 GHz radio continuum emission from five ultra-luminous, mid-IR selected hot, Dust-Obscured Galaxies (Hot DOGs) at z greater than or similar to 3 using the Karl G. Jansky Very Large Array. We detect CO(1-0) line emission in all five Hot DOGs, with one of them at high signal-to-noise ratio. We analyse FIR-radio spectral energy distributions, including dust, free-free, and synchrotron emission for the galaxies. We find that most of the 115 GHz rest-frame continuum is mostly due to synchrotron or free-free emission, with only a potentially small contribution from thermal emission. We see a deficit in the rest-frame 115 GHz continuum emission compared to dusty star-forming galaxies and sub-millimetre galaxies (SMGs) at high redshift, suggesting that Hot DOGs do not have similar cold gas reserves compared with star-forming galaxies. One target, W2305-0039, is detected in the FIRST 1.4 GHz survey, and is likely to possess compact radio jets. We compare to the FIR-radio correlation, and find that at least half of the Hot DOGs in our sample are radio-quiet with respect to normal galaxies. These findings suggest that Hot DOGs have comparably less cold molecular gas than star-forming galaxies at lower, z similar to 2 redshifts, and are dominated by powerful, yet radio-quiet AGN.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Blain, A. W.University Of Leicester (author)
  • Assef, R. J.Universidad Diego Portales,Diego Portales University (author)
  • Diaz-Santos, T.Universidad Diego Portales,Diego Portales University,Idryma Technologias kai Erevnas (FORTH),Foundation for Research and Technology Hellas (FORTH),Chinese Academy of Sciences (author)
  • Gonzalez-Lopez, J.Universidad Diego Portales,Diego Portales University,Carnegie Institution for Science (author)
  • Tsai, C-WChinese Academy of Sciences (author)
  • Aravena, M.Universidad Diego Portales,Diego Portales University (author)
  • Eisenhardt, P. R. M.California Institute of Technology (Caltech) (author)
  • Jones, Suzy,1988Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)suzyj (author)
  • Jun, H. D.Korea Institute for Advanced Study (author)
  • Kim, M.Kyungpook National University (author)
  • Stern, D.California Institute of Technology (Caltech) (author)
  • Wu, J.Chinese Academy of Sciences (author)
  • University Of LeicesterUniversidad Diego Portales (creator_code:org_t)

Related titles

  • In:Monthly Notices of the Royal Astronomical Society: Oxford University Press (OUP)496:2, s. 1565-15780035-87111365-2966

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