What does lie at the Milky Way centre? : Insights from the S2-star orbit precession

It has been recently demonstrated that both, a classical Schwarzschild black hole (BH), and a dense concentration of self- gravitating fermionic dark matter (DM) placed at the Galaxy centre, can explain the precise astrometric data (positions and radial velocities) of the S-stars orbiting Sgr A ∗. T...

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Detalles Bibliográficos
Autores principales:	Argüelles, Carlos Raúl, Mestre, Martín Federico, Becerra Vergara, E. A., Crespi, Valentina, Krut, A., Rueda, J. A., Ruffini, R.
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2021
Materias:	Ciencias Astronómicas stars: kinematics and dynamics Galaxy: centre Galaxy: structure dark matter
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/130874
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-130874
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Ciencias Astronómicas stars: kinematics and dynamics Galaxy: centre Galaxy: structure dark matter
spellingShingle	Ciencias Astronómicas stars: kinematics and dynamics Galaxy: centre Galaxy: structure dark matter Argüelles, Carlos Raúl Mestre, Martín Federico Becerra Vergara, E. A. Crespi, Valentina Krut, A. Rueda, J. A. Ruffini, R. What does lie at the Milky Way centre? : Insights from the S2-star orbit precession
topic_facet	Ciencias Astronómicas stars: kinematics and dynamics Galaxy: centre Galaxy: structure dark matter
description	It has been recently demonstrated that both, a classical Schwarzschild black hole (BH), and a dense concentration of self- gravitating fermionic dark matter (DM) placed at the Galaxy centre, can explain the precise astrometric data (positions and radial velocities) of the S-stars orbiting Sgr A ∗. This result encompasses the 17 best resolved S-stars, and includes the test of general relati vistic ef fects such as the gravitational redshift in the S2-star. In addition, the DM model features another remarkable result: The dense core of fermions is the central region of a continuous density distribution of DM whose diluted halo explains the Galactic rotation curve. In this Letter, we complement the above findings by analysing in both models the relativistic periapsis precession of the S2-star orbit. While the Schwarzschild BH scenario predicts a unique prograde precession for S2, in the DM scenario, it can be either retrograde or prograde, depending on the amount of DM mass enclosed within the S2 orbit, which, in turn, is a function of the DM fermion mass. We show that all the current and publicly available data of S2 cannot discriminate between the two models, but upcoming S2 astrometry close to next apocentre passage could potentially establish if Sgr A ∗is go v erned by a classical BH or by a quantum DM system.
format	Articulo Articulo
author	Argüelles, Carlos Raúl Mestre, Martín Federico Becerra Vergara, E. A. Crespi, Valentina Krut, A. Rueda, J. A. Ruffini, R.
author_facet	Argüelles, Carlos Raúl Mestre, Martín Federico Becerra Vergara, E. A. Crespi, Valentina Krut, A. Rueda, J. A. Ruffini, R.
author_sort	Argüelles, Carlos Raúl
title	What does lie at the Milky Way centre? : Insights from the S2-star orbit precession
title_short	What does lie at the Milky Way centre? : Insights from the S2-star orbit precession
title_full	What does lie at the Milky Way centre? : Insights from the S2-star orbit precession
title_fullStr	What does lie at the Milky Way centre? : Insights from the S2-star orbit precession
title_full_unstemmed	What does lie at the Milky Way centre? : Insights from the S2-star orbit precession
title_sort	what does lie at the milky way centre? : insights from the s2-star orbit precession
publishDate	2021
url	http://sedici.unlp.edu.ar/handle/10915/130874
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What does lie at the Milky Way centre? : Insights from the S2-star orbit precession

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