Amorim, A., Bauboeck, M., Benisty, M., Berger, J. -P., Clenet, Y., du Forest, V. Coude, de Zeeuw, T., Dexter, J., Duvert, G., Eckart, A., Eisenhauer, F., Ferreira, Miguel C., Gao, F., Garcia, Paulo J. V., Gendron, E., Genzel, R., Gillessen, S., Gordo, P., Habibi, M., Horrobin, M., Jimenez-Rosales, A., Jocou, L., Kervella, P., Lacour, S., Le Bouquin, J. -B., Lena, P., Ott, T., Poessel, M., Paumard, T., Perraut, K., Perrin, G., Pfuhl, O., Coira, G. Rodriguez, Rousset, G., Straub, O., Straubmeier, C., Sturm, E., Vincent, F., von Fellenberg, S., Waisberg, I. and Widmann, F. (2019). Scalar field effects on the orbit of S2 star. Mon. Not. Roy. Astron. Soc., 489 (4). S. 4606 - 4622. OXFORD: OXFORD UNIV PRESS. ISSN 1365-2966

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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.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Amorim, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bauboeck, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Benisty, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Berger, J. -P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Clenet, Y.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
du Forest, V. CoudeUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
de Zeeuw, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Dexter, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Duvert, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Eckart, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Eisenhauer, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ferreira, Miguel C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gao, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Garcia, Paulo J. V.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gendron, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Genzel, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gillessen, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gordo, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Habibi, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Horrobin, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jimenez-Rosales, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jocou, L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kervella, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lacour, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Le Bouquin, J. -B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lena, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ott, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Poessel, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Paumard, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Perraut, K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Perrin, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pfuhl, O.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Coira, G. RodriguezUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rousset, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Straub, O.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Straubmeier, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sturm, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Vincent, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
von Fellenberg, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Waisberg, I.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Widmann, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-129955
DOI: 10.1093/mnras/stz2300
Journal or Publication Title: Mon. Not. Roy. Astron. Soc.
Volume: 489
Number: 4
Page Range: S. 4606 - 4622
Date: 2019
Publisher: OXFORD UNIV PRESS
Place of Publication: OXFORD
ISSN: 1365-2966
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
SUPERMASSIVE BLACK-HOLE; GALACTIC-CENTER; STELLAR ORBITS; DARK-MATTER; A-ASTERISK; SAGITTARIUS; GRAVITY; CONSTRAINTS; PRECESSION; EXISTENCEMultiple languages
Astronomy & AstrophysicsMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/12995

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