|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'504'928
Articles rated: 2609
25 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Deep GALEX Imaging of the HST/COSMOS Field: A First Look at the Morphology of z~0.7 Star-forming Galaxies | | M. A. Zamojski
; D. Schiminovich
; R. M. Rich
; B. Mobasher
; A. M. Koekemoer
; P. Capak
; Y. Taniguchi
; S. S. Sasaki
; H. J. McCracken
; Y. Mellier
; E. Bertin
; H. Aussel
; D. B. Sanders
; O. Le Fevre
; O. Ilbert
; M. Salvato
; D. J. Thompson
; J. S. Kartaltepe
; N. Scoville
; T. A. Barlow
; K. Forster
; P. G. Friedman
; D. C. Martin
; P. Morrisey
; S. G. Neff
; M. Seibert
; T. Small
; T. K. Wyder
; L. Bianchi
; J. Donas
; T. M. Heckman
; Y.-W. Lee
; B. F. Madore
; B. Milliard
; A. S. Szalay
; B. Y. Welsh
; S. K. Yi
; | | Date: |
17 Jan 2007 | | Abstract: | We present a study of the morphological nature of redshift z~0.7 star-forming galaxies using a combination of HST/ACS, GALEX and ground-based images of the COSMOS field. Our sample consists of 8,146 galaxies, 5,777 of which are detected in the GALEX near-ultraviolet band down to a limiting magnitude of 25.5 (AB). We make use of the UV to estimate star formation rates, correcting for the effect of dust using the UV-slope, and compute, from the ACS F814W images, the C,A,S,G,M20 morphological parameters for all objects in our sample. We observe a morphological bimodality in the galaxy population and show that it has a strong correspondence with the FUV - g color bimodality. We conclude that UV-optical color predominantly evolves concurrently with morphology. We observe many of the most star-forming galaxies to have morphologies approaching that of early-type galaxies, and interpret this as evidence that strong starburst events are linked to bulge growth and constitute a process through which galaxies can be brought from the blue to the red sequence while simultaneously modifying their morphology accordingly. We conclude that the red sequence has continued growing at z~<0.7. We also observe z~0.7 galaxies to have physical properties similar to that of local galaxies, except for higher star formation rates. Whence we infer that the dimming of star-forming galaxies is responsible for most of the evolution in the star formation rate density of the Universe since that redshift, although our data are also consistent with a mild number evolution. [abridged] | | Source: | arXiv, astro-ph/0701478 | | 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 Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER