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HELP: star formation as function of galaxy environment with Herschel

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posted on 2023-06-09, 01:43 authored by Steven Duivenvoorden, Seb OliverSeb Oliver, V Buat, B Darvish, A Efstathiou, D Farrah, M Griffin, Pete Hurley, E Ibar, M Jarvis, A Papadopoulos, Mark Sargent, D Scott, J M Scudder, M Symeonidis, M Vaccari, M P Viero, L Wang
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 deg2. 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 (superscript) +0:3 (subscript) 0:2 times higher peak value of the star formation rate density at z about 1:9.

Funding

STFC quota studentships; G1439; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/M503836/1

HELP - Herschel Extragalactic Legacy Project; G1265; EUROPEAN UNION; FP7-SPACE-2013-1-607254

Additional AGP funding - supplementary to Sussex Consolidated Grant ST/L000652/1; G1443; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/M003574/1

History

Publication status

  • Published

File Version

  • Accepted version

Journal

Monthly Notices of the Royal Astronomical Society

ISSN

0035-8711

Publisher

Wiley-Blackwell

Issue

1

Volume

462

Page range

277-289

Department affiliated with

  • Physics and Astronomy Publications

Notes

This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society, ©: 2016 The Authors, Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2016-06-17

First Open Access (FOA) Date

2016-08-12

First Compliant Deposit (FCD) Date

2016-06-17

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