| | |
| | |
Stat |
Members: 3643 Articles: 2'487'895 Articles rated: 2609
28 March 2024 |
|
| | | |
|
Article overview
| |
|
Cosmic Star Formation History and its Dependence on Galaxy Stellar Mass | S. Juneau
; K. Glazebrook
; D. Crampton
; P. J. McCarthy
; S. Savaglio
; R. G. Abraham
; R. G. Carlberg
; H.-W. Chen
; D. Le Borgne
; R. O. Marzke
; K. Roth
; I. Jorgensen
; I. Hook
; R. Murowinski
; | Date: |
29 Nov 2004 | Journal: | Astrophys.J. 619 (2005) L135 | Subject: | astro-ph | Affiliation: | 1 and 3), K. Glazebrook , D. Crampton , P. J. McCarthy , S. Savaglio , R. G. Abraham , R. G. Carlberg , H.-W. Chen , D. Le Borgne , R. O. Marzke , K. Roth , I. Jorgensen , I. Hook and R. Murowinski ( Universite de Montreal, Johns Hopkins University | Abstract: | We examine the cosmic star formation rate (SFR) and its dependence on galaxy stellar mass over the redshift range 0.8 < z < 2 using data from the Gemini Deep Deep Survey (GDDS). The SFR in the most massive galaxies (M > 10^{10.8} M_sun) was six times higher at z = 2 than it is today. It drops steeply from z = 2, reaching the present day value at z ~ 1. In contrast, the SFR density of intermediate mass galaxies (10^{10.2} < M < 10^{10.8} M_sun) declines more slowly and may peak or plateau at z ~ 1.5. We use the characteristic growth time t_SFR = rho_M / rho_SFR to provide evidence of an associated transition in massive galaxies from a burst to a quiescent star formation mode at z ~ 2. Intermediate mass systems transit from burst to quiescent mode at z ~ 1, while the lowest mass objects undergo bursts throughout our redshift range. Our results show unambiguously that the formation era for galaxies was extended and proceeded from high to low mass systems. The most massive galaxies formed most of their stars in the first ~3 Gyr of cosmic history. Intermediate mass objects continued to form their dominant stellar mass for an additional ~2 Gyr, while the lowest mass systems have been forming over the whole cosmic epoch spanned by the GDDS. This view of galaxy formation clearly supports `downsizing’ in the SFR where the most massive galaxies form first and galaxy formation proceeds from larger to smaller mass scales. | Source: | arXiv, astro-ph/0411775 | Services: | Forum | Review | PDF | Favorites |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser claudebot
|
| |
|
|
|
| News, job offers and information for researchers and scientists:
| |