Dark stars at the Galactic centre - the main sequence
Pat Scott, Malcolm Fairbairn, Joakim Edsj\"o

TL;DR
This paper models how dark matter interactions could alter the evolution of stars near the Galactic centre, potentially revealing dark matter properties through stellar observations.
Contribution
It introduces the DarkStars code and provides detailed models of WIMP-influenced stellar evolution for stars in the Galactic centre.
Findings
Stars on elliptical orbits can have significantly increased dark matter capture rates.
Dark matter effects could be detectable in low-mass stars and binaries near the Galactic centre.
Observations could constrain dark matter properties or detect its influence.
Abstract
In regions of very high dark matter density such as the Galactic centre, the capture and annihilation of WIMP dark matter by stars has the potential to significantly alter their evolution. We describe the dark stellar evolution code DarkStars, and present a series of grids of WIMP-influenced stellar models for main sequence stars. We describe changes in which occur as a function of the rate of energy injection by WIMPs, for stars of 0.3-2.0 solar masses and metallicities Z = 0.0003-0.02. We show what rates of energy injection can be obtained using realistic orbital parameters for stars at the Galactic centre, including detailed consideration of the velocity and density profiles of dark matter. Capture and annihilation rates are strongly boosted when stars follow elliptical rather than circular orbits. If there is a spike of dark matter induced by the supermassive black hole at the…
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