2008/06/17 by Marco Taoso, Gianfranco Bertone, G. Meynet +3 · 1 citation
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Particle physics theoretical and experimental studies #astro-ph #hep-ph
paper · pdf · doi:10.1103/physrevd.78.123510
published as Phys.Rev.D78:123510,2008 · 4 pages, 4 figures
arxiv created 2008/06/17 · openalex publication_date 2008/12/04 · arxiv updated 2010/04/15 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We study the impact of the capture and annihilation of weakly interacting massive particles (WIMPs) on the evolution of Population III stars. With a suitable modification of the Geneva stellar evolution code, we study the evolution of 20 and 200M_\ensuremath\bigodot stars in dark matter halos with densities between 108 and 1011 GeV/cm3 during the core H-burning phase, and, for selected cases, until the end of the core He-burning phase. We find that for WIMP densities higher than 5.3 1010(\ensuremathσpSD/10^\ensuremath-38 cm2)^\ensuremath-1 GeV cm^\ensuremath-3 the core H-burning lifetime of 20M_\ensuremath\bigodot and 200M_\ensuremath\bigodot stars exceeds the age of the Universe, and stars are sustained only by WIMP annihilations. We determine the observational properties of these ``frozen'' objects and show that they can be searched for in the local Universe thanks to their anomalous mass-radius relation, which should allow unambiguous discrimination from normal stars.