Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-02-07
Astrophys.J.677:L1-L4,2008
Astronomy and Astrophysics
Astrophysics
One table (with data for actual ZAMS metal-free stars) added with respect to published version
Scientific paper
10.1086/587959
Assuming that Dark Matter is dominated by WIMPs, it accretes by gravitational attraction and scattering over baryonic material and annihilates inside celestial objects, giving rise to a "Dark Luminosity" which may potentially affect the evolution of stars. We estimate the Dark Luminosity achieved by different kinds of stars in a halo with DM properties characteristic of the ones where the first star formation episode occurs. We find that either massive, metal-free and small, galactic-like stars can achieve Dark Luminosities comparable or exceeding their nuclear ones. This might have dramatic effects over the evolution of the very first stars, known as Population III.
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