Physics – Optics
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20913204m&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #132.04; Bulletin of the American Astronomical Society,
Physics
Optics
Scientific paper
We track the evolution of galaxy optical and mid-infrared luminosity, and half-light radius, for 900 blue galaxies in the Great Observatories Origins Deep Survey (GOODS). We find that since z=1 the total infrared luminosity of a typical spiral galaxies has declined more rapidly than for peculiar/merger types. We suggest that gas consumption in disk galaxies results in lower star formation rates and hence lower total infrared luminosity with time. The optical luminosity of blue galaxies has also declined with time. Assuming a linear shift in MB with z, we use a maximum likelihood method to quantify the luminosity evolution of GOODS-N galaxies with respect to a volume limited local sample from the Sloan Digital Sky Survey. We find that the amount of evolution is dependent on galaxy size. Under these assumptions, large (R1/2 > 5 kpc), and intermediate sized (3 < R1/2 < 5 kpc) galaxies, experienced ΔMB =1.53 (+0.10, -0.13) and 1.65 (+0.18, -0.08) magnitudes of dimming since z=1. This can be explained by a simple exponential decline in star formation with an e-folding time of 3 Gyr. Meanwhile, small galaxies, or some subset thereof, have experienced more evolution, 2.55 (+/-0.38) magnitudes, different from galaxies with larger size at the 2-sigma level. This factor of ten decline in luminosity can be explained by sub-samples of starbursting dwarf systems that fade rapidly, coupled with a decline in burst strength or frequency. Samples of bursting, luminous, blue, compact galaxies at intermediate redshifts have been identified by various previous studies.
This work was supported in part by the NSF Science and Technology Center for Adaptive Optics managed by UC Santa Cruz under the cooperative agreement No. AST-9876783.
No associations
LandOfFree
Exploring the Optical and Infrared Evolution of Galaxies Since z=1 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 Exploring the Optical and Infrared Evolution of Galaxies Since z=1, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exploring the Optical and Infrared Evolution of Galaxies Since z=1 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1161120