Dark Stars: Dark Matter in the First Stars leads to a New Phase of Stellar Evolution

Details Dark Stars: Dark Matter in the First Stars leads to a New Phase of Stellar Evolution Dark Stars: Dark Matter in the First Stars leads to a New Phase of Stellar Evolution

2008-08-04

arxiv.org/abs/0808.0472v1

Astronomy and Astrophysics

Astrophysics

5 pages, Conference Proceeding for IAU Symposium 255: Low-Metallicity Star Formaion: From the First Stars to Dwarf Galaxies

Scientific paper

10.1017/S1743921308024575

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 ($\sim 800 M_\odot$), cool (6000 K), bright ($\sim 10^6 L_\odot$), long-lived ($\sim 10^6$ 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.

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