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.
Description
Constraints on dark matter annihilation in $\omega$ Centauri
%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
}