Показать сокращенную информацию
dc.contributor.author | Cherepashchuk A.M. | |
dc.contributor.author | Belinski A.A. | |
dc.contributor.author | Dodin A.V. | |
dc.contributor.author | Postnov K.A. | |
dc.date.accessioned | 2022-02-09T20:40:44Z | |
dc.date.available | 2022-02-09T20:40:44Z | |
dc.date.issued | 2021 | |
dc.identifier.issn | 1745-3925 | |
dc.identifier.uri | https://dspace.kpfu.ru/xmlui/handle/net/169626 | |
dc.description.abstract | The examination of long-term (1979-2020) photometric observations of SS433 enabled us to discover a non-zero orbital eccentricity of e = 0.05 ± 0.01. We have also found evidence for a secular increase in the orbital period at a rate of ˙Pb=(1.0± 0.3)× 10-7 s s-1. The binary orbital period increase rate makes it possible to improve the estimate of the binary mass ratio q = MX/MV > 0.8, where MX and MV are the masses of the relativistic object and the optical star, respectively. For an optical star mass of 10 M⊙, the mass of the relativistic object (a black hole) is MX > 8 M⊙. A neutron star in SS433 is reliably excluded because in that case the orbital period should decrease, in contradiction to observations. The derived value of ˙Pb sets a lower limit on the mass-loss rate in the Jeans mode from the binary system 7 × 10-6 M⊙ yr-1. The discovered orbital ellipticity of SS433 is consistent with the model of the slaved accretion disc tracing the precession of the misaligned optical star's rotational axis. | |
dc.relation.ispartofseries | Monthly Notices of the Royal Astronomical Society: Letters | |
dc.subject | binaries: close | |
dc.subject | stars: black holes | |
dc.subject | stars: individual: SS433 | |
dc.title | Discovery of orbital eccentricity and evidence for orbital period increase of SS433 | |
dc.type | Article | |
dc.relation.ispartofseries-issue | 1 | |
dc.relation.ispartofseries-volume | 507 | |
dc.collection | Публикации сотрудников КФУ | |
dc.relation.startpage | L19 | |
dc.source.id | SCOPUS17453925-2021-507-1-SID85114596366 |