期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 462, 期 1, 页码 277-289出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stw1466
关键词
galaxies: evolution; galaxies: star formation; infrared: galaxies
资金
- European Union [607254]
- Science and Technology Facilities Council [ST/M503836/1, ST/L000652/1]
- NASA through the Astrophysics Data Analysis Program (ADAP) [NNX12AE20G]
- CONICYT/FONDECYT [3130504]
- Square Kilometre Array South Africa project
- South African National Research Foundation and Department of Science and Technology [DST/CON 0134/2014]
- Italian Ministry for Foreign Affairs and International Cooperation [PGR GA ZA14GR02]
- CSA (Canada)
- NAOC (China)
- CEA (France)
- CNES (France)
- CNRS (France)
- ASI (Italy)
- MCINN (Spain)
- SNSB (Sweden)
- STFC (UK)
- UKSA (UK)
- NASA (USA)
- STFC [ST/N000706/1, ST/M503836/1, ST/N000919/1, ST/L000652/1, ST/N000811/1, ST/K000926/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/M503836/1, ST/L000652/1] Funding Source: researchfish
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 versus stellar mass relation (main sequence) of star-forming galaxies depends on environment. In this pilot study, we explore this question within 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. 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(-0.2)(+0.3) times higher peak value of the star formation rate density at z similar to 1.9.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据