http://arxiv.org/abs/1604.00838
Triangulum II is a recently discovered ultra faint dwarf spheroidal galaxy or globular cluster, which may be one of the most dark matter dominated objects known. In this work we try to estimate the potential of this object for studies of the indirect detection of self-annihilating dark matter by obtaining its astrophysical J-factor. We perform a basic estimate of the velocity gradient to look for signs of the halo being tidally disrupted but show that the observed value is statistically compatible with zero velocity gradient. We solve the spherical Jeans equation using Markov Chain Monte Carlo (MCMC) engine GreAT and the Jeans analysis part of the CLUMPY package. We find the results point towards a very large J-factor, appearing to make Triangulum II one of the best targets in the search for dark matter. However we stress that the very small number of line of sight velocities currently available for this object make follow up studies essential.
A. Genina and M. Fairbairn
Tue, 5 Apr 16
37/67
Comments: 6 figures, 7 pages
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