ULTRAFAINT DWARF GALAXIES - THE LOWEST-MASS RELICS FROM BEFORE REIONIZATION
New observations suggest that ultrafaint dwarf galaxies (UFDs) - the least luminous systems bound by dark matter halos (≲105 L⊙) - may have formed before reionization. The extrapolated virial masses today are uncertain, with estimates ranging from 108 M⊙ to as high as 109 M⊙ depending on the assumed form of the underlying potential. We show that the progenitor halo masses of UFDs can, in principle, be as low as M<inf>vir</inf> ≈ 107 M⊙. Under the right conditions, such a halo can survive the...[Show more]
|Collections||ANU Research Publications|
|Source:||Astrophysical Journal, The|
|01_Bland-Hawthorn_ULTRAFAINT_DWARF_GALAXIES_-_2015.pdf||8.56 MB||Adobe PDF|
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