HV 888

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HV 888
The red supergiant HV888 (WOH S140) in LMC.png
Red circle.svg
The red supergiant HV 888 located 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
Radius1,477[5]–1,974[4][a] R☉
Luminosity302,000+29,000
−27,000[6] (190,000[7] – 527,000[4]) L☉
Surface gravity (log g)+0.5[4] cgs
Temperature3,442[8]–3,500[4][5] K
Other designations
WOH S140, 2MASS J05041413-6716143, IRAS 05042-6720
Database references
SIMBADdata

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 ranging from over 1,400 to nearly 2,000 times that of the Sun (R☉) and is also one of the most luminous of its type with a range of nearly 300,000 to over 500,000 times that of the Sun (L☉).[10][5][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 and possibly even Saturn.

See also[]

Notes[]

  1. ^ The radius of HV 888 can be calculated using the Stefan–Boltzmann law and the solar effective temperature of 5,772 K:


References[]

  1. ^ a b c d e 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. ^ a b c d 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. S2CID 14056495.
  3. ^ a b 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. ^ a b c d e f 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. ^ a b c 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.
  6. ^ a b 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. ^ Kastner, Joel H.; Thorndike, Stephen L.; Romanczyk, Paul A.; Buchanan, Catherine L.; Hrivnak, Bruce J.; Sahai, Raghvendra; Egan, Michael (2008). "The Large Magellanic Cloud's Top 250: Classification of the Most Luminous Compact 8 μm Sources in the Large Magellanic Cloud". The Astronomical Journal. 136 (3): 1221–1241. arXiv:astro-ph/0703584. Bibcode:2008AJ....136.1221K. doi:10.1088/0004-6256/136/3/1221. S2CID 117820349.
  8. ^ Ren, Yi; Jiang, Bi-Wei (2020-07-20). "On the Granulation and Irregular Variation of Red Supergiants". The Astrophysical Journal. 898 (1): 24. arXiv:2006.06605. Bibcode:2020ApJ...898...24R. doi:10.3847/1538-4357/ab9c17. ISSN 1538-4357.
  9. ^ "HV888". Simbad.
  10. ^ 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.


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