2026-09-15T22:28:58Zhttps://gredos.usal.es/oai/request
oai:gredos.usal.es:10366/1614462026-01-12T16:02:54Zcom_10366_4092com_10366_4055com_10366_3946com_10366_3823col_10366_4093
Unveiling the nature of SgrA* with the geodesic motion of S-stars Monica, Riccardo della Martino, Iván de Agujeros negros Agujeros de gusanos GR black holes Wormholes Gravity [EN]Despite the huge improvements guaranteed by future GRAVITY observations of the S0-2 star, these will not be able to unveil the fundamental nature, whether black hole or wormhole, of the central supermassive object. Nevertheless, observing stars orbiting closer to the central gravitational source could allow to distinguish between the black hole and wormhole nature of this object at more than 5 . Firstly, we have used publicly available astrometric and spectroscopic measurements of the S0-2 star to constrain the metric around the supermassive object without finding any evidence either favouring or ruling out the wormhole nature. Secondly, we have designed a mock catalogue of future observations of the S0-2 star mirroring the accuracy and precision of GRAVITY. Afterwards, we firstly tested our methodology showing that our procedure recovers the input model, and subsequently we demonstrated that the constraining power of such a dataset is not enough to distinguish between black hole and wormhole. Finally, we built some toy models representing stars orbiting much closer the central object than S0-2. We used these toy models to investigate which are the ideal orbital features and observational strategies to achieve our aim of unveiling the fundamental nature of the central supermassive object, demonstrating that a star with a period of the order of 5 years and a pericentre distance of 5AU could identify the nature of the central object at almost 5 accuracy. 2025-01-09 2025-01-09 2022-03 info:eu-repo/semantics/article Riccardo Della Monica and Ivan de Martino JCAP03(2022)007 1475-7516 http://hdl.handle.net/10366/161446 10.1088/1475-7516/2022/03/007 1475-7516 eng https://dx.doi.org/10.1088/1475-7516/2022/03/007 IJCI2018-036198-I PGC2018- 096038-B-I00 info:eu-repo/semantics/openAccess IOP Publishing