Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/27511
Title: | A possible solution of the puzzling variation of the orbital period of MXB 1659-298 | Authors: | Iaria, R. Gambino, A. F. Di Salvo, T. Burderi, L. Matranga, M. Riggio, A. SANNA, ALBERTO Scarano, F. D'AI', ANTONINO |
Issue Date: | 2018 | Journal: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Number: | 473 | Issue: | 3 | First Page: | 3490 | Abstract: | MXB 1659-298 is a transient neutron-star low-mass X-ray binary system that shows eclipses with a periodicity of 7.1 h. MXB 1659-298 went to outburst in 2015 August, after 14 years of quiescence. We investigate the orbital properties of this source with a baseline of 40 years, obtained by combining the eight eclipse arrival times present in the literature with 51 eclipse arrival times collected during the last two outbursts. A quadratic ephemeris does not fit the delays associated with the eclipse arrival times and the addition of a sinusoidal term with a period of 2.31 ± 0.02 yr is required. We infer a binary orbital period of P = 7.1161099(3) h and an orbital period derivative of \dot{P}=-8.5(1.2) × 10^{-12} s s<SUP>-1</SUP>. We show that the large orbital period derivative can be explained with a highly non-conservative mass-transfer scenario, in which more than 98 per cent of the mass provided by the companion star leaves the binary system. We predict an orbital period derivative value of \dot{P}=-6(3) × 10^{-12} s s<SUP>-1</SUP> and constrain the companion-star mass between 0.3 and 1.2 M<SUB>☉</SUB>. Assuming that the companion star is in thermal equilibrium, the periodic modulation can be due to either a gravitational quadrupole coupling arising from variations of the oblateness of the companion star or the presence of a third body of mass M<SUB>3</SUB> > 21 Jovian masses. | URI: | http://hdl.handle.net/20.500.12386/27511 | URL: | https://academic.oup.com/mnras/article/473/3/3490/4628110 | ISSN: | 0035-8711 | DOI: | 10.1093/mnras/stx2529 | Bibcode ADS: | 2018MNRAS.473.3490I | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
stx2529.pdf | Pdf editoriale | 696.61 kB | Adobe PDF | View/Open |
Page view(s)
61
checked on Apr 23, 2024
Download(s)
14
checked on Apr 23, 2024
Google ScholarTM
Check
Altmetric
Altmetric
Items in DSpace are published in Open Access, unless otherwise indicated.