Mathematics – Logic
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21942908m&link_type=abstract
American Astronomical Society, AAS Meeting #219, #429.08
Mathematics
Logic
Scientific paper
Recent studies have revealed a population of massive disk galaxies at high-redshift that appear to be comprised entirely of old stars. Commonly proposed mechanisms for quenching star formation in massive galaxies, such as major mergers and AGN feedback, typically result in bulge-dominated systems or at least significant bulge components. Indeed in the local Universe, massive, quiescent systems are almost entirely spheroidal in shape, while star forming systems are more disk-like. It would appear that the processes governing star-formation quenching and morphological transition are closely linked, and passive disk galaxies at high-z may provide evidence of an important transition population. In order to better understand how passive disks compare to similarly quiescent spheroidal systems as well as star-forming disks at the same redshift, we examine their color gradients and structural properties using deep, high-resolution imaging data from the Cosmic Assembly Near-Infrared Deep Extragalactic Legacy Survey (CANDELS). While there are important structural differences between passive disks and their star-forming counterparts, we find that their radial color gradients imply a distribution of stellar populations that are much more similar to the quiescent spheroids, suggesting that whatever mechanism is responsible for quenching star-formation occurs in advance of their final morphological transition.
CANDELS Team
Faber Sandra M.
Guo Yan
Koo David C.
McGrath Elizabeth J.
No associations
LandOfFree
Color Gradients of Passive Disks at z 2 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Color Gradients of Passive Disks at z 2, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Color Gradients of Passive Disks at z 2 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1585020