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• W3100361752 endingPage "1042" @default.
• W3100361752 startingPage "1031" @default.
• W3100361752 abstract "We have proposed that the first phase of stellar evolution in the history of the universe may be dark (matter powered) stars (DSs), luminous objects powered by dark matter (DM) heating rather than by nuclear fusion, and in this paper we examine the history of these DSs. The power source is annihilation of weakly interacting massive particles (WIMPs) which are their own antiparticles. These WIMPs are the best motivated DM candidates and may be discovered by ongoing direct or indirect detection searches (e.g., Fermi/GLAST) or at the Large Hadron Collider at CERN. A new stellar phase results, powered by DM annihilation as long as there is a DM fuel, from millions to billions of years. We build up the DSs from the time DM heating becomes the dominant power source, accreting more and more matter onto them. We have included many new effects in the current study, including a variety of particle masses and accretion rates, nuclear burning, feedback mechanisms, and possible repopulation of DM density due to capture. Remarkably, we find that in all these cases, we obtain the same result: the first stars are very large, 500–1000 times as massive as the Sun; as well as puffy (radii 1–10 AU), bright (106–107 L☉), and cool (Tsurf < 10, 000 K) during the accretion. These results differ markedly from the standard picture in the absence of DM heating, in which the maximum mass is about 140 M☉ and the temperatures are much hotter (Tsurf > 50,000 K). Hence DSs should be observationally distinct from standard Pop III stars. In addition, DSs avoid the (unobserved) element enrichment produced by the standard first stars. Once the DM fuel is exhausted, the DS becomes a heavy main-sequence star; these stars eventually collapse to form massive black holes that may provide seeds for the supermassive black holes observed at early times as well as explanations for recent ARCADE data and for intermediate-mass black holes." @default.
• W3100361752 created "2020-11-23" @default.
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• W3100361752 date "2009-10-16" @default.
• W3100361752 modified "2023-10-16" @default.
• W3100361752 title "DARK STARS: A NEW LOOK AT THE FIRST STARS IN THE UNIVERSE" @default.
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• W3100361752 doi "https://doi.org/10.1088/0004-637x/705/1/1031" @default.
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