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  Scalar field effects on the orbit of S2 star

Amorim, A., Bauböck, M., Benisty, M., Berger, J.-P., Clénet, Y., du Forest, V. C., et al. (2019). Scalar field effects on the orbit of S2 star. Monthly Notices of the Royal Astronomical Society, 489(4), 4606-4621. doi:10.1093/mnras/stz2300.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-4DF8-E Version Permalink: http://hdl.handle.net/21.11116/0000-0005-4DF9-D
Genre: Journal Article

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Amorim, A., Author
Bauböck, M.1, Author              
Benisty, M., Author
Berger, J.-P., Author
Clénet, Y., Author
du Forest, V. Coudé, Author
Zeeuw, T.1, Author              
Dexter, J.1, Author              
Duvert, G., Author
Eckart, A., Author
Eisenhauer, F.1, Author              
Ferreira, Miguel C., Author
Gao, F.1, Author              
Garcia, Paulo J. V., Author
Gendron, E., Author
Genzel, R.1, Author              
Gillessen, S.1, Author              
Gordo, P., Author
Habibi, M.1, Author              
Horrobin, M., Author
Jimenez Rosales, A.1, Author              Jocou, L., AuthorKervella, P., AuthorLacour, S.1, Author              Le Bouquin, J.-B., AuthorLéna, P., AuthorOtt, T.1, Author              Pössel, M., AuthorPaumard, T., AuthorPerraut, K., AuthorPerrin, G., AuthorPfuhl, O.1, Author              Coira, G. Rodriguez, AuthorRousset, G., AuthorStraub, O.1, Author              Straubmeier, C., AuthorSturm, E.1, Author              Vincent, F., AuthorFellenberg, S. von1, Author              Waisberg, I.1, Author              Widmann, F.1, Author               more..
Affiliations:
1Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society, ou_159889              

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 Abstract: Precise measurements of the S-stars orbiting SgrA* have set strong constraints on the nature of the compact object at the centre of the Milky Way. The presence of a black hole in that region is well established, but its neighbouring environment is still an open debate. In that respect, the existence of dark matter in that central region may be detectable due to its strong signatures on the orbits of stars: the main effect is a Newtonian precession which will affect the overall pericentre shift of S2, the latter being a target measurement of the GRAVITY instrument. The exact nature of this dark matter (e.g. stellar dark remnants or diffuse dark matter) is unknown. This article assumes it to be a scalar field of toroidal distribution, associated with ultralight dark matter particles, surrounding the Kerr black hole. Such a field is a form of ‘hair’ expected in the context of superradiance, a mechanism that extracts rotational energy from the black hole. Orbital signatures for the S2 star are computed and shown to be detectable by GRAVITY. The scalar field can be constrained because the variation of orbital elements depends both on the relative mass of the scalar field to the black hole and on the field mass coupling parameter.

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 Dates: 2019-08-22
 Publication Status: Published online
 Pages: -
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 Rev. Method: Peer
 Identifiers: DOI: 10.1093/mnras/stz2300
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Title: Monthly Notices of the Royal Astronomical Society
  Other : Mon. Not. R. Astron. Soc.
Source Genre: Journal
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Publ. Info: Oxford : Oxford University Press
Pages: - Volume / Issue: 489 (4) Sequence Number: - Start / End Page: 4606 - 4621 Identifier: ISSN: 1365-8711
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000024150