The comoving infrared luminosity density: Domination of cold galaxies across 0 < z < 1
In this paper, we examine the contribution of galaxies with different infrared (IR) spectral energy distributions (SEDs) to the comoving IR luminosity density (IRLD), a proxy for the comoving star formation rate (SFR) density. We characterize galaxies as having either a cold or hot IR SED depending...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
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Oxford University Press
2010
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| Online Access: | http://hdl.handle.net/20.500.11937/32747 |
| _version_ | 1848753748858372096 |
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| author | Seymour, Nick Symeonidis, M. Page, M. Huynh, M. Dwelly, T. McHardy, I. Rieke, G. |
| author_facet | Seymour, Nick Symeonidis, M. Page, M. Huynh, M. Dwelly, T. McHardy, I. Rieke, G. |
| author_sort | Seymour, Nick |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | In this paper, we examine the contribution of galaxies with different infrared (IR) spectral energy distributions (SEDs) to the comoving IR luminosity density (IRLD), a proxy for the comoving star formation rate (SFR) density. We characterize galaxies as having either a cold or hot IR SED depending on whether the rest-frame wavelength of their peak IR energy output is above or below 90 µm. Our work is based on a far-IR selected sample both in the local Universe and at high redshift, the former consisting of IRAS60 µm-selected galaxies at z < 0.07 and the latter of Spitzer70 µm selected galaxies across0.1 < z= 1. We find that the total IR luminosity densities for each redshift/luminosity bin agree well with results derived from other deep mid-/far-IR surveys. Atz < 0.07, we observe the previously known results that moderate luminosity galaxies(LIR < 1011 L?) dominate the total luminosity density and that the fraction of cold galaxies decreases with increasing luminosity, becoming negligible at the highest luminosities. Conversely, abovez= 0.1, we find that luminous IR galaxies(LIR > 1011 L?), the majority of which are cold, dominate the IRLD. We therefore infer that cold galaxies dominate the IRLD across the whole0 < z < 1 range, hence appear to be the main driver behind the increase in SFR density up toz~ 1 whereas local luminous galaxies are not, on the whole, representative of the high-redshift population. © 2010 The Authors. Journal compilation © 2010 RAS. |
| first_indexed | 2025-11-14T08:29:27Z |
| format | Journal Article |
| id | curtin-20.500.11937-32747 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:29:27Z |
| publishDate | 2010 |
| publisher | Oxford University Press |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-327472017-09-13T15:27:38Z The comoving infrared luminosity density: Domination of cold galaxies across 0 < z < 1 Seymour, Nick Symeonidis, M. Page, M. Huynh, M. Dwelly, T. McHardy, I. Rieke, G. In this paper, we examine the contribution of galaxies with different infrared (IR) spectral energy distributions (SEDs) to the comoving IR luminosity density (IRLD), a proxy for the comoving star formation rate (SFR) density. We characterize galaxies as having either a cold or hot IR SED depending on whether the rest-frame wavelength of their peak IR energy output is above or below 90 µm. Our work is based on a far-IR selected sample both in the local Universe and at high redshift, the former consisting of IRAS60 µm-selected galaxies at z < 0.07 and the latter of Spitzer70 µm selected galaxies across0.1 < z= 1. We find that the total IR luminosity densities for each redshift/luminosity bin agree well with results derived from other deep mid-/far-IR surveys. Atz < 0.07, we observe the previously known results that moderate luminosity galaxies(LIR < 1011 L?) dominate the total luminosity density and that the fraction of cold galaxies decreases with increasing luminosity, becoming negligible at the highest luminosities. Conversely, abovez= 0.1, we find that luminous IR galaxies(LIR > 1011 L?), the majority of which are cold, dominate the IRLD. We therefore infer that cold galaxies dominate the IRLD across the whole0 < z < 1 range, hence appear to be the main driver behind the increase in SFR density up toz~ 1 whereas local luminous galaxies are not, on the whole, representative of the high-redshift population. © 2010 The Authors. Journal compilation © 2010 RAS. 2010 Journal Article http://hdl.handle.net/20.500.11937/32747 10.1111/j.1365-2966.2009.16083.x Oxford University Press unknown |
| spellingShingle | Seymour, Nick Symeonidis, M. Page, M. Huynh, M. Dwelly, T. McHardy, I. Rieke, G. The comoving infrared luminosity density: Domination of cold galaxies across 0 < z < 1 |
| title | The comoving infrared luminosity density: Domination of cold galaxies across 0 < z < 1 |
| title_full | The comoving infrared luminosity density: Domination of cold galaxies across 0 < z < 1 |
| title_fullStr | The comoving infrared luminosity density: Domination of cold galaxies across 0 < z < 1 |
| title_full_unstemmed | The comoving infrared luminosity density: Domination of cold galaxies across 0 < z < 1 |
| title_short | The comoving infrared luminosity density: Domination of cold galaxies across 0 < z < 1 |
| title_sort | comoving infrared luminosity density: domination of cold galaxies across 0 < z < 1 |
| url | http://hdl.handle.net/20.500.11937/32747 |