Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-06-03
Astrophys.J.685:L101-L112,2008
Astronomy and Astrophysics
Astrophysics
14 pages, 1 figure, 1 table, shortened manuscript for publication, updated mansucript in accordance with referee's report
Scientific paper
10.1086/592685
Dark Stars are the very first phase of stellar evolution in the history of the universe: the first stars to form (typically at redshifts $z \sim 10-50$) are powered by heating from dark matter (DM) annihilation instead of fusion (if the DM is made of particles which are their own antiparticles). We find equilibrium polytropic configurations for these stars; we start from the time DM heating becomes important ($M \sim 1-10 M_\odot$) and build up the star via accretion up to 1000 M$_\odot$. The dark stars, with an assumed particle mass of 100 GeV, are found to have luminosities of a few times $10^6$ L$_\odot$, surface temperatures of 4000--10,000 K, radii $\sim 10^{14}$ cm, lifetimes of at least $ 0.5$ Myr, and are predicted to show lines of atomic and molecular hydrogen. Dark stars look quite different from standard metal-free stars without DM heating: they are far more massive (e.g. $\sim 800 M_\odot$ for 100 GeV WIMPs), cooler, and larger, and can be distinguished in future observations, possibly even by JWST or TMT.
Bodenheimer Peter
Freese Katherine
Gondolo Paolo
Spolyar Douglas
No associations
LandOfFree
Stellar Structure of Dark Stars: a first phase of Stellar Evolution due to Dark Matter Annihilation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Stellar Structure of Dark Stars: a first phase of Stellar Evolution due to Dark Matter Annihilation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stellar Structure of Dark Stars: a first phase of Stellar Evolution due to Dark Matter Annihilation will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-196192