Mathematics – Logic
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21344104h&link_type=abstract
American Astronomical Society, AAS Meeting #213, #441.04; Bulletin of the American Astronomical Society, Vol. 41, p.318
Mathematics
Logic
Scientific paper
Due to the scarcity of cooling mechanisms in the early universe, the first stars (Population III) were likely very massive (15-500 solar) and luminous (millions of times solar). They formed large H II regions that engulfed nearby cosmological halos that could also host stars. Until recently, it was thought that UV radiation from one primordial star suppressed star formation in nearby halos by photoevaporating them and dissociating their molecular hydrogen, halting their cooling and collapse. However, recent numerical studies suggest that the ionization front of one star may instead promote star formation in other halos by compressing them and enriching their cores with molecular hydrogen. These preliminary studies address only the effects of high-mass stars on their environment. Due to their larger ratio of dissociating to ionizing photons, less massive stars may be more destructive to local star formation. They may have been less efficient at imploding nearby halos and more effective at dissociating them. Here, we present a new suite of radiation hydrodynamic simulations that explore the impact that relatively low-mass primordial stars have on star formation in neighboring cosmological halos.
Hueckstaedt Robert M.
Whalen Daniel
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