Year: 2024
Type: article
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.
Source: The European Physical Journal C
Institution: Indian Institute of Science Bangalore
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
Awards: G1475004043, G881075967
OpenAlex ID: W4402260595