%0 Generic %1 kar2020constraints %A Kar, Arpan %A Mukhopadhyaya, Biswarup %A Tingay, Steven %A McKinley, Ben %A Haverkorn, Marijke %A McSweeney, Sam %A Hurley-Walker, Natasha %A Mitra, Sourav %A Choudhury, Tirthankar Roy %D 2020 %K library %T Constraints on dark matter annihilation in $ømega$ Centauri %U http://arxiv.org/abs/2005.11962 %X We present an analysis of Murchison Widefield Array radio telescope data from $ømega$ Cen, possibly a stripped dwarf spheroidal galaxy core captured by our Galaxy. Recent interpretations of Fermi-LAT $\gamma$-ray data by Brown et al. (2019) and Reynoso-Cordova et al. (2019) suggest that $ømega$ Cen may contain significant Dark Matter. We utilise their best-fit Dark Matter annihilation models, and an estimate of the magnetic field strength in $ømega$ Cen, to calculate the expected radio synchrotron signal from annihilation, and show that one can usefully rule out significant parts of the magnetic field - diffusion coefficient plane using the current observational limits. Improvement by a factor of 10-100 on these limits could constrain the models even more tightly.

@misc{kar2020constraints, abstract = {We present an analysis of Murchison Widefield Array radio telescope data from $\omega$ Cen, possibly a stripped dwarf spheroidal galaxy core captured by our Galaxy. Recent interpretations of Fermi-LAT $\gamma$-ray data by Brown {\it et al.} (2019) and Reynoso-Cordova {\it et al.} (2019) suggest that $\omega$ Cen may contain significant Dark Matter. We utilise their best-fit Dark Matter annihilation models, and an estimate of the magnetic field strength in $\omega$ Cen, to calculate the expected radio synchrotron signal from annihilation, and show that one can usefully rule out significant parts of the magnetic field - diffusion coefficient plane using the current observational limits. Improvement by a factor of 10-100 on these limits could constrain the models even more tightly.}, added-at = {2020-05-26T07:24:51.000+0200}, author = {Kar, Arpan and Mukhopadhyaya, Biswarup and Tingay, Steven and McKinley, Ben and Haverkorn, Marijke and McSweeney, Sam and Hurley-Walker, Natasha and Mitra, Sourav and Choudhury, Tirthankar Roy}, biburl = {https://www.bibsonomy.org/bibtex/2369c285dc756237b1597c5383ff1bdc1/gpkulkarni}, description = {Constraints on dark matter annihilation in $\omega$ Centauri}, interhash = {2ea27886cd4236d7b71357cc0dc1e6c9}, intrahash = {369c285dc756237b1597c5383ff1bdc1}, keywords = {library}, note = {cite arxiv:2005.11962Comment: 7 pages, 4 figures, 1 table}, timestamp = {2020-05-26T07:24:51.000+0200}, title = {Constraints on dark matter annihilation in $\omega$ Centauri}, url = {http://arxiv.org/abs/2005.11962}, year = 2020 }