Star in the constellation Sagittarius
15 Sagittarii is a blue-hued binary star [10] system in the southern zodiac constellation of Sagittarius . The estimated distance based upon photometry is around 4,200 ly (1,300 pc).[7] It is faintly visible to the naked eye with an apparent visual magnitude of 5.37.[2] The system is moving closer to the Sun with a heliocentric radial velocity of around −6 km/s.[6]
Chini et al. (2012) identify this as a double-lined spectroscopic binary star system.[10] It shows a stellar classification of O9.7 Iab,[3] matching a massive O-type supergiant star . Along with the O-type star 16 Sgr (HD 167263), it is ionizing an H II region along the western edge of the molecular cloud L291.[11]
The Washington Double Star Catalog lists four companions within a 2 arcsecond angular radius .[12]
^ a b c d e van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics , 474 (2): 653–664, arXiv :0708.1752 , Bibcode :2007A&A...474..653V , doi :10.1051/0004-6361:20078357 , S2CID 18759600 .
^ a b Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues . 2237 . Bibcode :2002yCat.2237....0D .
^ a b Sota, A.; Maíz Apellániz, J.; Morrell, N. I. ; Barbá, R. H.; Walborn, N. R.; Gamen, R. C.; Arias, J. I.; Alfaro, E. J. (2014). "The Galactic O-Star Spectroscopic Survey (GOSSS). II. Bright Southern Stars". The Astrophysical Journal Supplement . 211 (1): 10. arXiv :1312.6222 . Bibcode :2014ApJS..211...10S . doi :10.1088/0067-0049/211/1/10 . S2CID 118847528 .
^ a b c Fraser, M.; Dufton, P. L.; Hunter, I.; Ryans, R. S. I. (May 2010), "Atmospheric parameters and rotational velocities for a sample of Galactic B-type supergiants", Monthly Notices of the Royal Astronomical Society , 404 (3): 1306−1320, arXiv :1001.3337 , Bibcode :2010MNRAS.404.1306F , doi :10.1111/j.1365-2966.2010.16392.x , S2CID 118674151
^ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters , 38 (5): 331, arXiv :1108.4971 , Bibcode :2012AstL...38..331A , doi :10.1134/S1063773712050015 , S2CID 119257644 .
^ a b Gontcharov, G. A. (November 2006), "Pulkovo Compilation of Radial Velocities for 35,495 Hipparcos stars in a common system", Astronomy Letters , 32 (11): 759–771, arXiv :1606.08053 , Bibcode :2006AstL...32..759G , doi :10.1134/S1063773706110065 , S2CID 119231169 .
^ a b Kemp, S. N.; et al. (December 1996), "Further optical and UV spectroscopy of stars in the direction of the Riegel & Crutcher cold cloud", Monthly Notices of the Royal Astronomical Society , 283 (3): 1089–1101, Bibcode :1996MNRAS.283.1089K , doi :10.1093/mnras/283.3.1089 .
^ Martins, F.; et al. (February 2015), "Radial dependence of line profile variability in seven O9-B0.5 stars", Astronomy & Astrophysics , 574 : 38, arXiv :1409.5057 , Bibcode :2015A&A...574A.142M , doi :10.1051/0004-6361/201423882 , S2CID 118365203 , A142.
^ "15 Sgr" . SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2018-03-15 .
^ a b Chini, R.; et al. (August 2012), "A spectroscopic survey on the multiplicity of high-mass stars", Monthly Notices of the Royal Astronomical Society , 424 (3): 1925–1929, arXiv :1205.5238 , Bibcode :2012MNRAS.424.1925C , doi :10.1111/j.1365-2966.2012.21317.x , S2CID 119120749
^ Marti, J.; et al. (October 1993), "HH 80-81: A Highly Collimated Herbig-Haro Complex Powered by a Massive Young Star", Astrophysical Journal , 416 : 208, Bibcode :1993ApJ...416..208M , doi :10.1086/173227
^ Sana, H.; et al. (November 2014), "Southern Massive Stars at High Angular Resolution: Observational Campaign and Companion Detection", The Astrophysical Journal Supplement Series , 215 (1): 35, arXiv :1409.6304 , Bibcode :2014ApJS..215...15S , doi :10.1088/0067-0049/215/1/15 , S2CID 53500788 , 15.