Dark Matter Capture in the First Stars: a Power Source and Limit on Stellar Mass

Details Dark Matter Capture in the First Stars: a Power Source and Limit on Stellar Mass Dark Matter Capture in the First Stars: a Power Source and Limit on Stellar Mass

2008-02-12

arxiv.org/abs/0802.1724v4

JCAP 0811:014,2008

Astronomy and Astrophysics

Astrophysics

19 pages, 4 figures, 3 Tables updated captions and graphs, corrected grammer, and added citations revised for submission to JC

Scientific paper

10.1088/1475-7516/2008/11/014

The annihilation of weakly interacting massive particles can provide an important heat source for the first (Pop. III) stars, potentially leading to a new phase of stellar evolution known as a "Dark Star". When dark matter (DM) capture via scattering off of baryons is included, the luminosity from DM annihilation may dominate over the luminosity due to fusion, depending on the DM density and scattering cross-section. The influx of DM due to capture may thus prolong the lifetime of the Dark Stars. Comparison of DM luminosity with the Eddington luminosity for the star may constrain the stellar mass of zero metallicity stars; in this case DM will uniquely determine the mass of the first stars. Alternatively, if sufficiently massive Pop. III stars are found, they might be used to bound dark matter properties.

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