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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]
References
^
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.