A minimal empirical model for the cosmic far-infrared background anisotropies
- Creators
- Wu, Hao-Yi
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Doré, Olivier
Abstract
Cosmic far-infrared background (CFIRB) probes unresolved dusty star-forming galaxies across cosmic time and is complementary to ultraviolet and optical observations of galaxy evolution. In this work, we interpret the observed CFIRB anisotropies using an empirical model based on resolved galaxies in ultraviolet and optical surveys. Our model includes stellar mass functions, star-forming main sequence and dust attenuation. We find that the commonly used linear Kennicutt relation between infrared luminosity and star formation rate overproduces the observed CFIRB amplitudes. The observed CFIRB requires that low-mass galaxies have lower infrared luminosities than expected from the Kennicutt relation, implying that low-mass galaxies have lower dust content and weaker dust attenuation. Our results demonstrate that CFIRB not only provides a stringent consistency check for galaxy evolution models but also constrains the dust content of low-mass galaxies.
Additional Information
© 2017 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. Accepted 2017 January 4. Received 2016 December 30; in original form 2016 November 22. Published: 07 January 2017. We thank Joanne Cohn and Martin White for helpful discussions, and we thank Yao-Yuan Mao for providing the code and assistance for the abundance matching calculation. HW acknowledges the support by the US National Science Foundation (NSF) grant AST1313037. The calculations in this work were performed on the Caltech computer cluster Zwicky, which is supported by NSF MRI-R2 award number PHY-096029. OD acknowledges the hospitality of the Aspen Center for Physics, which is supported by NSF grant PHY-1066293. Part of the research described in this paper was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. The Bolshoi–Planck simulation was performed by Anatoly Klypin within the Bolshoi project of the University of California High-Performance AstroComputing Center (UC-HiPACC) and was run on the Pleiades supercomputer at the NASA Ames Research Center.Attached Files
Published - stx024.pdf
Submitted - 1611.04517.pdf
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Additional details
- Eprint ID
- 77834
- Resolver ID
- CaltechAUTHORS:20170530-134647637
- NSF
- AST-1313037
- NSF
- PHY-096029
- NSF
- PHY-1066293
- NASA/JPL/Caltech
- Created
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2017-05-30Created from EPrint's datestamp field
- Updated
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2023-03-15Created from EPrint's last_modified field