High Redshift Dust Obscured Galaxies, A Morphology-SED Connection Revealed by Keck Adaptive Optics Imaging

Details High Redshift Dust Obscured Galaxies, A Morphology-SED Connection Revealed by Keck Adaptive Optics Imaging High Redshift Dust Obscured Galaxies, A Morphology-SED Connection Revealed by Keck Adaptive Optics Imaging

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21330207m&link_type=abstract

American Astronomical Society, AAS Meeting #213, #302.07; Bulletin of the American Astronomical Society, Vol. 41, p.272

Physics

Optics

Scientific paper

Keck Adaptive Optics (AO) K'-band images reveal the morphologies of 15 high redshift (z 2) dust obscured galaxies (DOGs). DOGs are defined by an optical to mid-IR color of fν(24) / fν(R) > 1000, redder than Arp 220 at any redshift. With ultra-luminous infrared luminosities, DOGs are thought to be powered by a combination of AGN and star formation. We use high spatial resolution (0.5 - 1 kpc at these redshifts) AO images to help disentangle the dominant energy source in each DOG and to look for triggers, such as evidence of ongoing mergers. We find evidence for ongoing merging in 10-20% of the sample. We also find a statistically significant correlation between galaxy compactness and 24 micron flux (luminosity), with the brightest DOGs exhibiting more compact morphologies than fainter DOGs. The most diffuse systems tend to show a 1.6 micron stellar bump in their spectral energy distributions redshifted to the Spitzer IRAC bands (4.5 - 8.0 microns). The imaging results lend further support to the idea that the highest luminosity DOGs are AGN dominated (resulting in compact morphology), while the lower luminosity, diffuse, DOGs tend to be star formation dominated.

Affiliated with

Also associated with

No associations

Rating

High Redshift Dust Obscured Galaxies, A Morphology-SED Connection Revealed by Keck Adaptive Optics Imaging 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 High Redshift Dust Obscured Galaxies, A Morphology-SED Connection Revealed by Keck Adaptive Optics Imaging, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High Redshift Dust Obscured Galaxies, A Morphology-SED Connection Revealed by Keck Adaptive Optics Imaging will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1696797