V1936 Aquilae

From Wikipedia, the free encyclopedia
V1936 Aquilae
Observation data
Epoch J2000      Equinox J2000
Constellation Aquila
Right ascension 19h 23m 47.64168s[1]
Declination 14° 36′ 39.06463″[1]
Apparent magnitude (V) 15.1
Characteristics
Evolutionary stage Blue supergiant
Spectral type O4I[2]
Variable type cLBV[3]
Astrometry
Parallax (π)0.5076 ± 0.1157[1] mas
Distance6,000[4] pc
Details
Mass25[4] M☉
Radius143.4[a] R☉
Luminosity562,000[4] L☉
Temperature13,213[4] K
Other designations
[OMN2000] LS1, 2MASS J19234764+1436391
Database references
SIMBADdata

V1936 Aquilae is a blue supergiant and candidate Luminous blue variable located in the nebula , in the constellation Aquila, about 20,000 light years away. The star was originally identified as a massive star in 2000,[2] and was thought to be an O-type supergiant. However, subsequent analyses have shown it to be not O but B-type, as well as being possibly an LBV.

Properties[]

V1936 Aquilae is a very luminous star. Recent measurements hint at a bolometric luminosity of around 560,000 suns, assuming a distance of 6 kiloparsecs, consistent with the distance of Westerhout 51, the very large H II region (nebula) it is located in. The star likely has a temperature of around 13,200 Kelvins.[4] The Stefan-Boltzmann Law suggests a radius of around 143 times that of the Sun.

Notes[]

  1. ^ Applying the Stefan–Boltzmann law with a nominal solar effective temperature of 5,772 K:

References[]

  1. ^ a b c Gaia Collaboration (2018-04-01). "VizieR Online Data Catalog: Gaia DR2 (Gaia Collaboration, 2018)". VizieR Online Data Catalog. 1345. Bibcode:2018yCat.1345....0G.
  2. ^ a b Okumura, Shin-ichiro; Mori, Atsushi; Nishihara, Eiji; Watanabe, Etsuji; Yamashita, Takuya (2000-11-01). "The Initial Mass Function of a Massive Star-forming Region W51". The Astrophysical Journal. 543 (2): 799–821. Bibcode:2000ApJ...543..799O. doi:10.1086/317116. ISSN 0004-637X.
  3. ^ Smith, Nathan; Aghakhanloo, Mojgan; Murphy, Jeremiah W.; Drout, Maria R.; Stassun, Keivan G.; Groh, Jose H. (2019-09-01). "On the Gaia DR2 distances for Galactic luminous blue variables". Monthly Notices of the Royal Astronomical Society. 488 (2): 1760–1778. Bibcode:2019MNRAS.488.1760S. doi:10.1093/mnras/stz1712. ISSN 0035-8711.
  4. ^ a b c d e Bik, A.; Henning, Th.; Wu, S. -W.; Zhang, M.; Brandner, W.; Pasquali, A.; Stolte, A. (2019-04-01). "Near-infrared spectroscopy of the massive stellar population of W51: evidence for multi-seeded star formation". Astronomy and Astrophysics. 624: A63. arXiv:1902.05460. Bibcode:2019A&A...624A..63B. doi:10.1051/0004-6361/201935061. ISSN 0004-6361. S2CID 118711844.


Stub icon

This variable star–related article is a stub. You can help Wikipedia by .

  • v
  • t
Retrieved from ""