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Using the motion of S2 to constrain vector clouds around SgrA*

Fuente: arXiv

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Autori principali:	GRAVITY Collaboration, Foschi, A., Abuter, R., Dayem, K. Abd El, Aimar, N., Seoane, P. Amaro, Amorim, A., Berger, J. P., Bonnet, H., Bourdarot, G., Brandner, W., Davies, R., de Zeeuw, P. T., Defrère, D., Dexter, J., Drescher, A., Eckart, A., Eisenhauer, F., Schreiber, N. M. Förster, Garcia, P. J. V., Genzel, R., Gillessen, S., Gomes, T., Haubois, X., Heißel, G., Henning, Th., Jochum, L., Jocou, L., Kaufer, A., Kreidberg, L., Lacour, S., Lapeyrère, V., Bouquin, J. -B. Le, Léna, P., Lutz, D., Mang, F., Millour, F., Ott, T., Paumard, T., Perraut, K., Perrin, G., Pfuhl, O., Rabien, S., Ribeiro, D. C., Bordoni, M. Sadun, Scheithauer, S., Shangguan, J., Shimizu, T., Stadler, J., Straubmeier, C., Sturm, E., Subroweit, M., Tacconi, L. J., Vincent, F., von Fellenberg, S., Woillez, J.
Natura:	Preprint
Pubblicazione:	2023
Soggetti:	Astrophysics of Galaxies Instrumentation and Methods for Astrophysics General Relativity and Quantum Cosmology
Accesso online:	Acceder al recurso
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_version_	1866913226975870976
author	GRAVITY Collaboration Foschi, A. Abuter, R. Dayem, K. Abd El Aimar, N. Seoane, P. Amaro Amorim, A. Berger, J. P. Bonnet, H. Bourdarot, G. Brandner, W. Davies, R. de Zeeuw, P. T. Defrère, D. Dexter, J. Drescher, A. Eckart, A. Eisenhauer, F. Schreiber, N. M. Förster Garcia, P. J. V. Genzel, R. Gillessen, S. Gomes, T. Haubois, X. Heißel, G. Henning, Th. Jochum, L. Jocou, L. Kaufer, A. Kreidberg, L. Lacour, S. Lapeyrère, V. Bouquin, J. -B. Le Léna, P. Lutz, D. Mang, F. Millour, F. Ott, T. Paumard, T. Perraut, K. Perrin, G. Pfuhl, O. Rabien, S. Ribeiro, D. C. Bordoni, M. Sadun Scheithauer, S. Shangguan, J. Shimizu, T. Stadler, J. Straubmeier, C. Sturm, E. Subroweit, M. Tacconi, L. J. Vincent, F. von Fellenberg, S. Woillez, J.
author_facet	GRAVITY Collaboration Foschi, A. Abuter, R. Dayem, K. Abd El Aimar, N. Seoane, P. Amaro Amorim, A. Berger, J. P. Bonnet, H. Bourdarot, G. Brandner, W. Davies, R. de Zeeuw, P. T. Defrère, D. Dexter, J. Drescher, A. Eckart, A. Eisenhauer, F. Schreiber, N. M. Förster Garcia, P. J. V. Genzel, R. Gillessen, S. Gomes, T. Haubois, X. Heißel, G. Henning, Th. Jochum, L. Jocou, L. Kaufer, A. Kreidberg, L. Lacour, S. Lapeyrère, V. Bouquin, J. -B. Le Léna, P. Lutz, D. Mang, F. Millour, F. Ott, T. Paumard, T. Perraut, K. Perrin, G. Pfuhl, O. Rabien, S. Ribeiro, D. C. Bordoni, M. Sadun Scheithauer, S. Shangguan, J. Shimizu, T. Stadler, J. Straubmeier, C. Sturm, E. Subroweit, M. Tacconi, L. J. Vincent, F. von Fellenberg, S. Woillez, J.
contents	The dark compact object at the centre of the Milky Way is well established to be a supermassive black hole with mass $M_{\bullet} \sim 4.3 \cdot 10^6 \, M_{\odot}$, but the nature of its environment is still under debate. In this work, we used astrometric and spectroscopic measurements of the motion of the star S2, one of the closest stars to the massive black hole, to determine an upper limit on an extended mass composed of a massive vector field around Sagittarius A*. For a vector with effective mass $10^{-19} \, \rm eV \lesssim m_s \lesssim 10^{-18} \, \rm eV$, our Markov Chain Monte Carlo analysis shows no evidence for such a cloud, placing an upper bound $M_{\rm cloud} \lesssim 0.1\% M_{\bullet}$ at $3σ$ confidence level. We show that dynamical friction exerted by the medium on S2 motion plays no role in the analysis performed in this and previous works, and can be neglected thus.
format	Preprint
id	arxiv_https___arxiv_org_abs_2312_02653
institution	arXiv
publishDate	2023
record_format	arxiv
spellingShingle	Using the motion of S2 to constrain vector clouds around SgrA* GRAVITY Collaboration Foschi, A. Abuter, R. Dayem, K. Abd El Aimar, N. Seoane, P. Amaro Amorim, A. Berger, J. P. Bonnet, H. Bourdarot, G. Brandner, W. Davies, R. de Zeeuw, P. T. Defrère, D. Dexter, J. Drescher, A. Eckart, A. Eisenhauer, F. Schreiber, N. M. Förster Garcia, P. J. V. Genzel, R. Gillessen, S. Gomes, T. Haubois, X. Heißel, G. Henning, Th. Jochum, L. Jocou, L. Kaufer, A. Kreidberg, L. Lacour, S. Lapeyrère, V. Bouquin, J. -B. Le Léna, P. Lutz, D. Mang, F. Millour, F. Ott, T. Paumard, T. Perraut, K. Perrin, G. Pfuhl, O. Rabien, S. Ribeiro, D. C. Bordoni, M. Sadun Scheithauer, S. Shangguan, J. Shimizu, T. Stadler, J. Straubmeier, C. Sturm, E. Subroweit, M. Tacconi, L. J. Vincent, F. von Fellenberg, S. Woillez, J. Astrophysics of Galaxies Instrumentation and Methods for Astrophysics General Relativity and Quantum Cosmology The dark compact object at the centre of the Milky Way is well established to be a supermassive black hole with mass $M_{\bullet} \sim 4.3 \cdot 10^6 \, M_{\odot}$, but the nature of its environment is still under debate. In this work, we used astrometric and spectroscopic measurements of the motion of the star S2, one of the closest stars to the massive black hole, to determine an upper limit on an extended mass composed of a massive vector field around Sagittarius A*. For a vector with effective mass $10^{-19} \, \rm eV \lesssim m_s \lesssim 10^{-18} \, \rm eV$, our Markov Chain Monte Carlo analysis shows no evidence for such a cloud, placing an upper bound $M_{\rm cloud} \lesssim 0.1\% M_{\bullet}$ at $3σ$ confidence level. We show that dynamical friction exerted by the medium on S2 motion plays no role in the analysis performed in this and previous works, and can be neglected thus.
title	Using the motion of S2 to constrain vector clouds around SgrA*
topic	Astrophysics of Galaxies Instrumentation and Methods for Astrophysics General Relativity and Quantum Cosmology
url	https://arxiv.org/abs/2312.02653