Abstract Details
| Name: K ADITYA Affiliation: INDIAN INSTITUTE OF ASTROPHYSICS Conference ID: ASI2024_509 Title : Black holes at the center of dwarf spheroidal galaxies: Is there room for more mass at the center ? Authors and Co-Authors : K ADITYA \& ARUN MANGALAM Abstract Type : Poster Abstract Category : Galaxies and Cosmology Abstract : In this study, we present the mass models of the Milky Way dwarf spheroidal galaxies using the kinematic and photometric data available in the literature. We model these galaxies as a three-component system consisting of the star, dark matter halo, and a central black hole. Our analysis shows that mass models with a cuspy dark matter halos prefer a central black holes with masses equal to $10^3 M_{\odot}$. In contrast, in the case of cored dark matter models, the central black hole masses fall within the range of $10^4 M_{\odot}$ to $10^6 M_{\odot}$. We note that the presence of a central black hole may be obscured in the case of cuspy dark matter models since the models with and without a central black hole predict a comparable stellar dispersion. Whereas we find that the cored dark matter model tends to favor the presence of a supermassive black hole at the center. Interestingly, we find that mass models for Leo 2 predict a black hole mass equal to $10^{6}M_{\odot}$ for both cored and cuspy dark matter models. Finally, we note that the dwarf spheroidal galaxies deviate from the $M_{BH}-\sigma_{*}$relation, with cored models consistent with the galaxy assembly-based origins $(M_{BH}\propto\sigma^{2}_{*})$ and cuspy models with a feedback-based scenario $(M_{BH}\propto\sigma^{4}_{*})$. |