HV 888

HV 888, also known as WOH S140, is a red supergiant (RSG) star located in the Large Magellanic Cloud.[9] It is among the largest known stars, with a radius more than a thousand solar radii, and is also one of most luminous of its type with around 300,000 times the Sun's luminosity.[8][7][6] The effective temperature is estimated to be around 3,500 K.[4] If placed at the center of the solar system, its photosphere would engulf the orbit of Jupiter.

HV 888
The red supergiant HV 888 loacted in the LMC. Its position is circled.
Credit: Université de Strasbourg/CNRS
Observation data
Epoch J2000      Equinox
Constellation Dorado (LMC)
Right ascension  05h 04m 14.116s[1]
Declination −67° 27′ 06.40″[1]
Apparent magnitude (V) 11.861[2]
Characteristics
Evolutionary stage Red supergiant
Spectral type M4 Ia[3]
Apparent magnitude (K) 6.781[2]
Apparent magnitude (U) 15.876[2]
Apparent magnitude (B) 13.949[2]
Variable type SRc[3]
Astrometry
Radial velocity (Rv)291.53[1] km/s
Proper motion (μ) RA: 1.701[1] mas/yr
Dec.: 0.054[1] mas/yr
Distance50,000[4] pc
Details
Radius1,300[5] R☉
Luminosity302,000+29,000
−27,000[6] L☉
Surface gravity (log g)+0.5[4] cgs
Temperature3,500[4][7]–3,574[8] K
Other designations
WOH S140, 2MASS J05041413-6716143, IRAS 05042-6720
Database references
SIMBADdata

See also

References
  1. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. Bonanos, A. Z.; Massa, D. L.; Sewilo, M.; Lennon, D. J.; Panagia, N.; Smith, L. J.; Meixner, M.; Babler, B. L.; Bracker, S.; Meade, M. R.; Gordon, K. D.; Hora, J. L.; Indebetouw, R.; Whitney, B. A. (2009). "Spitzer SAGE Infrared Photometry of Massive Stars in the Large Magellanic Cloud". The Astronomical Journal. 138 (4): 1003–1021. arXiv:0905.1328. Bibcode:2009AJ....138.1003B. doi:10.1088/0004-6256/138/4/1003.
  3. Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1: B/gcvs. Bibcode:2009yCat....102025S.
  4. Groenewegen, M. A. T.; Sloan, G. C. (2018). "Luminosities and mass-loss rates of Local Group AGB stars and red supergiants". Astronomy & Astrophysics. 609: A114. arXiv:1711.07803. Bibcode:2018A&A...609A.114G. doi:10.1051/0004-6361/201731089. S2CID 59327105.
  5. van Loon, J. Th; et al. (November 1999). "Mass-loss rates and luminosity functions of dust-enshrouded AGB stars and red supergiants in the LMC". Astronomy and Astrophysics. 351: 559–572. arXiv:astro-ph/9909416. Bibcode:1999A&A...351..559V.
  6. Davies, Ben; Crowther, Paul A.; Beasor, Emma R. (2018). "The luminosities of cool supergiants in the Magellanic Clouds, and the Humphreys–Davidson limit revisited". Monthly Notices of the Royal Astronomical Society. 478 (3): 3138–3148. arXiv:1804.06417. Bibcode:2018MNRAS.478.3138D. doi:10.1093/mnras/sty1302. S2CID 59459492.
  7. Kamath, D.; Wood, P. R.; Van Winckel, H. (December 2015). "Optically visible post-AGB stars, post-RGB stars and young stellar objects in the Large Magellanic Cloud". Monthly Notices of the Royal Astronomical Society. 454 (2): 1468–1502. arXiv:1508.00670. Bibcode:2015MNRAS.454.1468K. doi:10.1093/mnras/stv1202. S2CID 59496789.
  8. Van Loon, J. Th.; Cioni, M.-R. L.; Zijlstra, A. A.; Loup, C. (2005). "An empirical formula for the mass-loss rates of dust-enshrouded red supergiants and oxygen-rich Asymptotic Giant Branch stars". Astronomy and Astrophysics. 438 (1): 273–289. arXiv:astro-ph/0504379. Bibcode:2005A&A...438..273V. doi:10.1051/0004-6361:20042555. S2CID 16724272.
  9. "HV888". Simbad.


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.