Computer Science
Scientific paper
Aug 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005noao.prop..524r&link_type=abstract
NOAO Proposal ID #2005B-0524
Computer Science
Scientific paper
The Large Area Lyman Alpha survey has successfully identified the population of young Lyα emitting galaxies predicted over 35 years ago. High equivalent widths of Lyα in these sources suggest that they are a very young (age < 10^7 years), metal poor, population of stars, making them very interesting objects for understanding galaxy formation. With two nights of Magellan+IMACS time, we will obtain spectroscopic confirmation of 150-200 secure LALA sources at redshift z=4.5. Followup of a similar number of fainter Lyα candidates will characterize the completeness and weed out foreground emission line galaxies. The excellent match between wide-field capabilities of IMACS and the LALA survey makes this the most complete confirmation and characterization of the high redshift Lyα population yet. With our spectroscopic sample, we will: (1) Search for AGN among our sample- a few should be found if the AGN fraction is comparable to that in Lyman break galaxies. (2) Produce a high S/N coadded spectrum, where we will look for (a) HeII (1640Å) emission, which is an indicator of Pop III stars; and (b) ISM absorption lines, whose velocity offset relative to the Lyα emission is an indicator of galactic winds in these early starbursts. (3) Obtain a clean measurement of spatial correlations among Lyα galaxies, and thereby derive the halo mass, occupancy number, and duty cycle of Lyα galaxies, to see how they fit into the bigger picture of galaxy formation.
Malhotra Sangeeta
Rhoads James
No associations
LandOfFree
Lyman Alpha Galaxies and Galaxy Formation Scenarios 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 Lyman Alpha Galaxies and Galaxy Formation Scenarios, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lyman Alpha Galaxies and Galaxy Formation Scenarios will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-797259