[Previous] | [Session 20] | [Next]
S. Malhotra (JHU), J. Rhoads (STScI), A. Dey, B. Jannuzi (NOAO), D. Stern (JPL), H. Spinrad (UC, Berkeley)
We find many candidate z=4.5 Lyman-alpha emitting galaxies in our LALA (Large Area Lyman Alpha) survey. More than half of these sources have rest frame equivalent widths greater than 200 Angstroms, which is the largest equivalent width expected for a standard stellar initial mass function (IMF). Either these sources are type II quasars or galaxies with an IMF dominated by massive stars. From Chandra Deep Field X-ray source counts, we estimate that only 10-20% of the LALA sources can be type II quasars. This then indicates that some galaxies at high redshifts had top heavy IMFs.
If you would like more information about this abstract, please follow the link to http://www.sdss.jhu.edu/~san/LALA.html. This link was provided by the author. When you follow it, you will leave the Web site for this meeting; to return, you should use the Back comand on your browser.
The author(s) of this abstract have provided an email address for comments about the abstract: san@pha.jhu.edu