Location
University of Nevada, Las Vegas
Start Date
16-4-2011 10:00 AM
End Date
16-4-2011 11:30 AM
Description
Lyman-break galaxies (LBGs) are star-forming galaxies found at high redshift that provide large amounts of information on early star and galaxy formation. We use large-scale cosmological smoothed-particle hydrodynamical simulations to simulate the physical properties of LBGs, such as stellar mass, star-formation rate, and magnitude. In particular, we focus on the question of which dark matter (DM) halos host LBGs. Our simulation suggests that only 1.74% of all DM halos host LBGs, though among the massive DM halos with mass Mhalo >1011.5 Msun, the fraction is 51.93%. The occupation number of LBGs ranges from 1 to 17 per halo.
Keywords
Dark matter (Astronomy); Galaxies — Formation
Disciplines
Astrophysics and Astronomy | External Galaxies | Stars, Interstellar Medium and the Galaxy
Language
English
Halo occupation of Lyman-break galaxies
University of Nevada, Las Vegas
Lyman-break galaxies (LBGs) are star-forming galaxies found at high redshift that provide large amounts of information on early star and galaxy formation. We use large-scale cosmological smoothed-particle hydrodynamical simulations to simulate the physical properties of LBGs, such as stellar mass, star-formation rate, and magnitude. In particular, we focus on the question of which dark matter (DM) halos host LBGs. Our simulation suggests that only 1.74% of all DM halos host LBGs, though among the massive DM halos with mass Mhalo >1011.5 Msun, the fraction is 51.93%. The occupation number of LBGs ranges from 1 to 17 per halo.
Comments
Research supported by: NSF grant AST-0807491, NASA grant HST-AR-12143-01-A; NASA Grant/Cooperative Agreement # NNX08AE57A, issued by the Nevada NASA EPSCoR program; and the UNLV Presidents' Infrastructure Award.