| Name: | Abhishek Dubey |
| Affiliation: | IISc Bangalore |
| Conference ID : | ASI2024_176 |
| Title : | Bounds on ultralight bosons from the Event Horizon Telescope observation of Sgr A * |
| Authors : | Akash Kumar Saha, Priyank Parashari, Tarak Nath Maity, Abhishek Dubey, Subhadip Bouri, Ranjan Laha |
| Authors Affiliation: | 1. Akash Kumar Saha, Priyank Parashari, Abhishek Dubey, Subhadip Bouri, Ranjan Laha ( Indian Institute of Science, Bangalore - 560034, India )
2. Tarak Nath Maity ( Harish-Chandra Research Institute (HRI), Prayagraj (Allahabad) - 211019, India ) |
| Mode of Presentation: | Poster |
| Abstract Category : | Galaxies and Cosmology |
| Abstract : | Recent observation of Sagittarius A*(Sgr A*) by the Event Horizon Telescope (EHT) collaboration has uncovered various unanswered questions in black hole (BH) physics. Besides, it may also probe various beyond the Standard Model (BSM) scenarios. One of the most profound possibilities is the search for ultralight bosons (ULBs) using BH superradiance (SR). EHT observations imply that Sgr A* has a non-zero spin. Using this observation, we derive bounds on the mass of ULBs with purely gravitational interactions. Considering self-interacting ultralight axions, we constrain new regions in the parameter space of decay constant for a certain spin of Sgr A*. Future observations of various spinning BHs can improve the present constraints on ULBs. |
