Abstract
The Milky Way’s dwarf spheroidal (dSph) galaxies are among the best targets for the indirect detection of dark matter (DM) from annihilation (resp. decay) products. The expected gamma- ray flux depends on the so-called ‘ J -factor’ (resp. ‘ D -factor’), the integral of the squared DM density (resp. DM density) along the line-of-sight. Using a large number of simulated dSphs, we define an optimized Jeans analysis setup for the reconstruction of the DM density with stellar- kinematic data. Employing this setup, we provide estimates of astrophysical J - and D -factors for twenty-two Galactic dSphs, including the newly discovered Reticulum II. We finally identify several criteria that may indicate a contamination of a kinematic dataset by interlopers, leading to unreliable astrophysical factors. We find that the kinematic sample of Segue I, one of the closest dSph, might be affected by this issue.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
