HELP: star formation as function of galaxy environment with Herschel
The Herschel Extragalactic Legacy Project (HELP) brings together a vast range of data from many astronomical observatories. Its main focus is on the Herschel data, which maps dust obscured star formation over 1300 deg$^2$. With this unprecedented combination of data sets, it is possible to investiga...
| Main Authors: | , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
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Oxford University Press
2016
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| _version_ | 1797080157305962496 |
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| author | Duivenvoorden, S Oliver, S Buat, V Darvish, B Efstathiou, A Farrah, D Griffin, M Hurley, P Ibar, E Jarvis, M Papadopoulos, A Sargent, M Scott, D Scudder, J Symeonidis, M Vaccari, M Viero, M Wang, L |
| author_facet | Duivenvoorden, S Oliver, S Buat, V Darvish, B Efstathiou, A Farrah, D Griffin, M Hurley, P Ibar, E Jarvis, M Papadopoulos, A Sargent, M Scott, D Scudder, J Symeonidis, M Vaccari, M Viero, M Wang, L |
| author_sort | Duivenvoorden, S |
| collection | OXFORD |
| description | The Herschel Extragalactic Legacy Project (HELP) brings together a vast range of data from many astronomical observatories. Its main focus is on the Herschel data, which maps dust obscured star formation over 1300 deg$^2$. With this unprecedented combination of data sets, it is possible to investigate how the star formation vs stellar mass relation (main-sequence) of star-forming galaxies depends on environment. In this pilot study we explore this question between 0.1 < z < 3.2 using data in the COSMOS field. We estimate the local environment from a smoothed galaxy density field using the full photometric redshift probability distribution. We estimate star formation rates by stacking the SPIRE data from the Herschel Multi-tiered Extragalactic Survey (HerMES). Our analysis rules out the hypothesis that the main-sequence for star-forming systems is independent of environment at 1.5 < z < 2, while a simple model in which the mean specific star formation rate declines with increasing environmental density gives a better description. However, we cannot exclude a simple hypothesis in which the main-sequence for star-forming systems is independent of environment at z < 1.5 and z > 2. We also estimate the evolution of the star formation rate density in the COSMOS field and our results are consistent with previous measurements at z < 1.5 and z > 2 but we find a $1.4^{+0.3}_{-0.2}$ times higher peak value of the star formation rate density at $z \sim 1.9$. |
| first_indexed | 2024-03-07T00:56:10Z |
| format | Journal article |
| id | oxford-uuid:88291455-5d8a-48d5-b974-6bb5b6601b38 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T00:56:10Z |
| publishDate | 2016 |
| publisher | Oxford University Press |
| record_format | dspace |
| spelling | oxford-uuid:88291455-5d8a-48d5-b974-6bb5b6601b382022-03-26T22:15:15ZHELP: star formation as function of galaxy environment with HerschelJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:88291455-5d8a-48d5-b974-6bb5b6601b38Symplectic Elements at OxfordOxford University Press2016Duivenvoorden, SOliver, SBuat, VDarvish, BEfstathiou, AFarrah, DGriffin, MHurley, PIbar, EJarvis, MPapadopoulos, ASargent, MScott, DScudder, JSymeonidis, MVaccari, MViero, MWang, LThe Herschel Extragalactic Legacy Project (HELP) brings together a vast range of data from many astronomical observatories. Its main focus is on the Herschel data, which maps dust obscured star formation over 1300 deg$^2$. With this unprecedented combination of data sets, it is possible to investigate how the star formation vs stellar mass relation (main-sequence) of star-forming galaxies depends on environment. In this pilot study we explore this question between 0.1 < z < 3.2 using data in the COSMOS field. We estimate the local environment from a smoothed galaxy density field using the full photometric redshift probability distribution. We estimate star formation rates by stacking the SPIRE data from the Herschel Multi-tiered Extragalactic Survey (HerMES). Our analysis rules out the hypothesis that the main-sequence for star-forming systems is independent of environment at 1.5 < z < 2, while a simple model in which the mean specific star formation rate declines with increasing environmental density gives a better description. However, we cannot exclude a simple hypothesis in which the main-sequence for star-forming systems is independent of environment at z < 1.5 and z > 2. We also estimate the evolution of the star formation rate density in the COSMOS field and our results are consistent with previous measurements at z < 1.5 and z > 2 but we find a $1.4^{+0.3}_{-0.2}$ times higher peak value of the star formation rate density at $z \sim 1.9$. |
| spellingShingle | Duivenvoorden, S Oliver, S Buat, V Darvish, B Efstathiou, A Farrah, D Griffin, M Hurley, P Ibar, E Jarvis, M Papadopoulos, A Sargent, M Scott, D Scudder, J Symeonidis, M Vaccari, M Viero, M Wang, L HELP: star formation as function of galaxy environment with Herschel |
| title | HELP: star formation as function of galaxy environment with Herschel |
| title_full | HELP: star formation as function of galaxy environment with Herschel |
| title_fullStr | HELP: star formation as function of galaxy environment with Herschel |
| title_full_unstemmed | HELP: star formation as function of galaxy environment with Herschel |
| title_short | HELP: star formation as function of galaxy environment with Herschel |
| title_sort | help star formation as function of galaxy environment with herschel |
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