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LS 5039 is a binary system in the constellation of Scutum. It has an apparent magnitude of 11.27,[3] and it is about 8,200 light-years away.[4]
LS 5039 consists of a massive O-type main-sequence star, and a compact object (likely a black hole)[4] that emits HE (high energy) and VHE (very high energy) gamma rays. It is one of the only three known star systems of this kind, together with LS I +61 303 and PSR B1259-63. The two objects orbit each other every 3.9 days, along a moderately eccentric orbit.[4] Additionally, it is one of the few massive X-ray binaries known to be associated with radio emission.[6]
References
- ^ Sarty, Gordon E.; Szalai, Tamás; Kiss, László; Matthews, Jaymie M.; Wu, Kinwah; Kuschnig, Rainer; Guenther, David B.; Moffat, Anthony F. J.; Rucinski, Slavek M.; Sasselov, Dimitar; Weiss, Werner W.; Huziak, Richard; Johnston, Helen M.; Phillips, Andre; Ashley, Michael C. B. (February 2011). "The γ-ray binary LS 5039: mass and orbit constraints from MOST observations". Monthly Notices of the Royal Astronomical Society. 411 (2): 1293–1300. arXiv:1009.5150. Bibcode:2011MNRAS.411.1293S. doi:10.1111/j.1365-2966.2010.17757.x. S2CID 13234345. Retrieved 24 March 2022.
- ^ a b c d Gaia Collaboration (2016). "Gaia Data Release 1". Astronomy & Astrophysics. 595: A2. arXiv:1609.04172. Bibcode:2016A&A...595A...2G. doi:10.1051/0004-6361/201629512. S2CID 1828208.
- ^ a b Zacharias, N. (2012). "The fourth US Naval Observatory CCD Astrograph Catalog (UCAC4)". VizieR On-line Data Catalog. Bibcode:2012yCat.1322....0Z.
- ^ a b c d e f g h i Casares, J; Ribo, M; Ribas, I; Paredes, J. M; Marti, J; Herrero, A (2005). "A possible black hole in the γ-ray microquasar LS 5039". Monthly Notices of the Royal Astronomical Society. 364 (3): 899–908. arXiv:astro-ph/0507549. Bibcode:2005MNRAS.364..899C. doi:10.1111/j.1365-2966.2005.09617.x. S2CID 8393701.
- ^ "V* V479 Sct". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2 May 2018.
- ^ Trigueros Páez, E.; Barbá, R. H.; Negueruela, I.; Maíz Apellániz, J.; Simón-Díaz, S.; Holgado, G. (2021). "MONOS: Multiplicity of Northern O-type Spectroscopic systems". Astronomy & Astrophysics. 655: A4. arXiv:2106.08865. doi:10.1051/0004-6361/202141018. S2CID 235446900.
External links
- Discovery of Very High Energy Gamma Rays Associated with an X-ray Binary (Science Express) July 7, 2005
- Astronomers Discovery Very High Energy Gamma-ray Emission From Microquasar (ScienceDaily) May 19, 2006
See also
- LS I +61 303, the only other known VHE gamma ray producing system
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