Star in the constellation Vulpecula
GS 2000+25 is an X-ray binary system in the constellation Vulpecula , consisting of a late K-type star and a black hole . It is also an X-ray nova .
Properties
Because the black hole is more massive than the companion star, it is the primary of the system. The black hole has a mass of about 5 solar masses while the companion has a mass of about 0.5 solar masses. Because the companion star has a low mass, the system is a low-mass X-ray binary.[ 6]
See also
References
^ Chevalier, C.; Ilovaisky, S. A. (March 1993). "Optical studies of transient low-mass X-ray binaries. IV. A 10-hour distorsion wave in the quiescent light curve of GS 2000+25" . Astronomy and Astrophysics . 269 : 301– 309. Bibcode :1993A&A...269..301C . Retrieved 28 May 2022 . ^ a b c d Liu, Q. Z; Van Paradijs, J; Van Den Heuvel, E. P. J (2007). "A catalogue of low-mass X-ray binaries in the Galaxy, LMC, and SMC (Fourth edition)". Astronomy & Astrophysics . 469 (2): 807. arXiv :0707.0544 Bibcode :2007A&A...469..807L . doi :10.1051/0004-6361:20077303 . S2CID 14673570 . ^ a b Yungelson, L; Lasota, J.-P (2008). "Evolution of low-mass binaries with black-hole components". New Astronomy Reviews . 51 (10– 12): 860– 868. arXiv :0801.3433 Bibcode :2008NewAR..51..860Y . doi :10.1016/j.newar.2008.03.017 . S2CID 11830754 . ^ Reynolds, Mark T; Callanan, Paul J; Robinson, Edward L; Froning, Cynthia S (2008). "Infrared contamination in Galactic X-ray novae" . Monthly Notices of the Royal Astronomical Society . 387 (2): 788. arXiv :0804.0370 Bibcode :2008MNRAS.387..788R . doi :10.1111/j.1365-2966.2008.13272.x S2CID 16918671 . ^ "GS 2000+25" . SIMBAD Centre de données astronomiques de Strasbourg . Retrieved 26 November 2017 .^ Filippenko, Alexei V.; Matheson, Thomas; Barth, Aaron J. (1995). "A Black Hole in the X-Ray Nova GS 2000+25" . Astrophysical Journal Letters . 455 (2): L139. Bibcode :1995ApJ...455L.139F . doi :10.1086/309831 S2CID 123161764 .
