Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21740701w&link_type=abstract
American Astronomical Society, AAS Meeting #217, #407.01; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
Using the Millennium-II Simulation dark matter sub-halo merger histories, we created mock catalogs of Lyman Alpha Emitting (LAE) galaxies at z=3.1 to study the properties of their descendants. Several models were created by selecting the halos to match the observed LAE median dark matter mass and number density to study the effects of mass selection on descendant properties. We used assembly, formation and merger ages to study age dependence on the LAE descendants. For the models which best represent LAEs at z=3.1, the z=0 descendants have a median mass of 1012 MSun, with a wide scatter in masses. The z=0 central sub-halos distributions have median masses 1012 MSun. Typical descendants of z=3.1 LAEs are therefore L* type galaxies. The median descendant mass is robust to various methods of age determination but could vary by a factor of 4 due to current observational uncertainties in the clustering of LAEs used to determine their median z=3.1 mass. We gratefully acknowledge support from NSF, DOE and NASA.
Bond Nicholas
Gawiser Eric
Walker Jean P.
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