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Dark Stars: Dark matter in the first stars leads to a new phase of stellar evolution

Published online by Cambridge University Press:  01 June 2008

Katherine Freese ,
Douglas Spolyar ,
Anthony Aguirre ,
Peter Bodenheimer ,
Paolo Gondolo ,
J. A. Sellwood  and
Naoki Yoshida
Katherine Freese
Affiliation:
Michigan Center for Theoretical Physics, University of Michigan, Ann Arbor, MI 48109, USA email: [email protected]
Douglas Spolyar
Affiliation:
Dept. of Physics, University of California, Santa Cruz, CA 95064, USA email: [email protected], [email protected]
Anthony Aguirre
Affiliation:
Dept. of Physics, University of California, Santa Cruz, CA 95064, USA email: [email protected], [email protected]
Peter Bodenheimer
Affiliation:
Dept. of Astronomy, University of California, Santa Cruz, CA 95064, USA email: [email protected]
Paolo Gondolo
Affiliation:
Physics Dept., University of Utah, Salt Lake City, UT 84112, USA email: [email protected]
J. A. Sellwood
Affiliation:
Dept. of Physics and Astronomy, Rutgers Univ., Piscataway, NJ 08854, USA email: [email protected]
Naoki Yoshida
Affiliation:
Inst. for the Physics and Math. of the Universe, Univ. of Tokyo, Kashiwa, Chiba, Japan email: [email protected]
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Abstract

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The first phase of stellar evolution in the history of the universe may be Dark Stars, powered by dark matter heating rather than by fusion. Weakly interacting massive particles, which are their own antiparticles, can annihilate and provide an important heat source for the first stars in the the universe. This talk presents the story of these Dark Stars. We make predictions that the first stars are very massive (~800M⊙), cool (6000 K), bright (~106L⊙), long-lived (~106 years), and probable precursors to (otherwise unexplained) supermassive black holes. Later, once the initial DM fuel runs out and fusion sets in, DM annihilation can predominate again if the scattering cross section is strong enough, so that a Dark Star is born again.

Keywords

cosmology: dark matterstars: evolutionstars: fundamental parameters
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Issue S255: Low-Metallicity Star Formation: From the First Stars to Dwarf Galaxies , June 2008 , pp. 56 - 60
Copyright
Copyright © International Astronomical Union 2008

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