Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-05-26
Astrophys.J. 540 (2000) L83
Astronomy and Astrophysics
Astrophysics
4 pages, including 4 figures. Uses AASTeX and emulateapj5.sty. Includes referee changes
Scientific paper
10.1086/312878
We discuss V and R band photometry for 67% of the Sullivan et al. 2000 SA57 ultraviolet-selected galaxy sample. In a sample of 176 UV-selected galaxies, Sullivan et al. 2000 find that 24% have (UV-B) colors too blue for consistency with starburst spectral synthesis models. We propose that these extreme blue, UV excess galaxies are Wolf-Rayet (WR) galaxies, starburst galaxies with strong UV emission from WR stars. We measure a median (V-R)=0.38+-0.06 for the UV-selected sample, bluer than a sample optically selected at R but consistent with starburst and WR galaxy colors. We demonstrate that redshifted WR emission lines can double or triple the flux through the UV bandpass at high redshifts. Thus the (UV-B) color of a WR galaxy can be up to 1.3 mag bluer at high redshift, and the expected selection function is skewed to larger redshifts. The redshift distribution of the extreme blue, UV excess galaxies matches the selection function we predict from the properties of WR galaxies.
Brown Warren R.
Fabricant Daniel G.
Geller Margaret J.
Kenyon Scott. J.
No associations
LandOfFree
UV excess galaxies: Wolf-Rayet galaxies 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 UV excess galaxies: Wolf-Rayet galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and UV excess galaxies: Wolf-Rayet galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-409795