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SUMMARY:Contributory: Nature of the dark matter distribution near the Gala
 ctic Center black hole: Insights from stellar orbital precession
DTSTART;VALUE=DATE-TIME:20261120T051500Z
DTEND;VALUE=DATE-TIME:20261120T053000Z
DTSTAMP;VALUE=DATE-TIME:20261026T170028Z
UID:indico-contribution-951@indico.narit.or.th
DESCRIPTION:Speakers: Debojit Paul (Department of Physics\, Gauhati Univer
 sity)\n**Abstract:**\nThe stellar orbits near the Galactic Center black ho
 le provide a unique probe for understanding the nature of mass distributio
 n as well as carrying out tests of gravity. Inferring the nature of mass d
 istribution in the region is crucial for understanding the formation histo
 ry of the black hole and how it interacts with its environment. In this wo
 rk we consider several viable dark matter models and constrain the paramet
 ers of the models which are consistent with the latest bound on dark mass 
 near the Galactic Center. The pericenter shift of stellar orbits in presen
 ce of such mass distributions are worked out. We compare the dark matter p
 recession with general relativistic precession and identify regions where 
 dark matter induced effects might be dominant. We consider 13 S-stars that
  have passed or expected to pass their pericenter within the next decade. 
 The prospect of detection of the dark matter effects in these stellar orbi
 ts through existing and upcoming large telescopes have been explored. In t
 he orbit of S2\, the effect of the different dark matter profiles along wi
 th some modified gravity models is investigated. It is seen that the orbit
  of S2 is insensitive to dark matter distribution but provides a good prob
 e for testing modified gravity theories. Additionally\, other stellar orbi
 ts with low eccentricity and large semi-major axis are found to be promine
 nt probes for distinguishing different dark matter distributions. We ident
 ify five S-star orbits that can be used to distinguish between these mass 
 profiles using observational facilities like Keck\, Very Large Telescope a
 nd upcoming Thirty Meter Telescope.\n\n\n----------\nReferences:\n\n 1. Pa
 ul D.\, Kalita S.\, 2026\, [MNRAS][1]\, 547\, 2 \n 2. GRAVITY Collaboratio
 n et al.\, 2024\, [A&A][2]\, 692\, A242\n\n\n  [1]: https://academic.oup.c
 om/mnras/article/547/2/stag318/8483897\n  [2]: https://www.aanda.org/artic
 les/aa/full_html/2024/12/aa52274-24/aa52274-24.html\n\nhttps://indico.nari
 t.or.th/event/234/contributions/951/
LOCATION:Pattaya\, Thailand D Varee Jomtien Beach Pattaya Hotel
URL:https://indico.narit.or.th/event/234/contributions/951/
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