Duivenvoorden-MNRAS-Accepted.pdf (2.17 MB)
HELP: star formation as function of galaxy environment with Herschel
journal contribution
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 WangThe 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 SocietyISSN
0035-8711Publisher
Wiley-BlackwellExternal DOI
Issue
1Volume
462Page range
277-289Department 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
2016-06-17First Open Access (FOA) Date
2016-08-12First Compliant Deposit (FCD) Date
2016-06-17Usage metrics
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