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25 April 2024 |
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The Potential of the Dwarf Galaxy Triangulum II for Dark Matter Indirect Detection | | Anna Genina
; Malcolm Fairbairn
; | | Date: |
4 Apr 2016 | | Abstract: | 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. | | Source: | arXiv, 1604.0838 | | Services: | Forum | Review | PDF | Favorites | |
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