Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21541003d&link_type=abstract
American Astronomical Society, AAS Meeting #215, #410.03; Bulletin of the American Astronomical Society, Vol. 42, p.235
Astronomy and Astrophysics
Astronomy
Scientific paper
Luminous and ultra-luminous galaxies, galaxies with LIR > 1011Lsol and 1012Lsol respectively, are critical in understanding galaxy interaction and evolution; however, the local population (z < 0.088) as a class has been understudied. We present a color analysis of a subset of 22 local (U)LIRGs from the Great Observatory All-sky LIRG Survey (GOALS) sample. We examine the g - r color distribution for both global and localized regions within each system in order to understand what physical mechanisms give rise to the appearance and color of these sources. The 2 kpc regions surrounding the K-band centroid of each object are redder and optically fainter than the corresponding hosts, which are aligned with the luminous end of the blue cloud. We compare the total photometry colors with pipeline data from the SDSS archives and find the database color distribution to differ significantly. Finally, two color profiles of the ULIRGs Mrk 231, host of a known QSO, and Arp 220, host of a heavily obscured AGN, show that despite their differences, their host colors are very similar. This result suggests that the vast difference between the two objects might be dominated by the amount of dust obscuration in the central regions. This work was conducted by a Research Experience for Undergraduates (REU) position at the University of Hawai'i's Institute for Astronomy and funded by the NSF.
Vivian U.
Dufault Michele
Sanders Dave
No associations
LandOfFree
Color Analysis of Local (U)LIRGs 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 Analysis of Local (U)LIRGs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Color Analysis of Local (U)LIRGs will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-965310