Physics

 

Dr. Anupam Ray
TIFR, Mumbai

Abstract : Unusual masses of the black holes being discovered by gravitational wave experiments pose fundamental questions about the origin of these black holes. More interestingly, black holes with masses smaller than the Chandrasekhar limit (~ 1.4 M_{\\odot})\\u000C are essentially impossible to produce through any standard stellar evolution. Black holes of primordial origin, with fine-tuned parameters and with no well-established formation mechanisms, are the most discussed explanation of these objects. The notable alternative proposals, implosion of a compact object due to a tiny black hole transit or dark core collapse, are either ineffective or appeal to baroque dark matter models. In this talk, I will discuss a new production channel of sub-Chandrasekhar mass black holes: non-annihilating DM with non-zero interaction strength with stellar nuclei, which is a vanilla dark matter model, can naturally explain these low mass black holes. I will also point out several avenues to test the origin of these low mass black holes.

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