SMC 018136

SMC 018136, also known as PMMR 37, is a red supergiant star located in the Small Magellanic Cloud. It is one of the largest stars and one of most luminous SMC cool supergiants so far discovered, with a radius of 1,310 times that of the sun and a bolometric luminosity over 200,000 times more than Sun. If it were in the place of the Sun, its photosphere would at least engulf the orbit of Jupiter.

SMC 018136

SMC 018136 is visible in the full-size image
Observation data
Epoch J2000      Equinox J2000
Constellation Tucana
Right ascension 0h 50m 56.095s[1]
Declination -72° -15m -6.07s[1]
Apparent magnitude (V) 11.61[2]
Characteristics
Spectral type K4.5 Ia-Ib,[3] M0Ia[4]
Apparent magnitude (K) 7.849±0.020[1]
Astrometry
Radial velocity (Rv)185.7[5] km/s
Details
Radius1,310[6] R☉
Luminosity214,000[3] L☉
Surface gravity (log g)−0.4[7] cgs
Temperature3,575[6] K
Other designations
TYC 9138-1852-1, 2MASS J00505609-7215060, GSC 09138-01852
Database references
SIMBADdata

SMC 018136 has a spectral type M0 Ia[4] and an effective temperature 3,575 K,[6] although more recent papers suggest it has a slightly earlier spectral type of K4.5 Ia-Ib.[3]

See also

References
  1. "2MASS". VizieR. Centre de Données astronomiques de Strasbourg. Retrieved 27 March 2017.
  2. Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27. Bibcode:2000A&A...355L..27H.
  3. 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.
  4. Humphreys, R. M. (1979). "M supergiants and the low metal abundances in the Small Magellanic Cloud". Astrophysical Journal. 231: 384. Bibcode:1979ApJ...231..384H. doi:10.1086/157201.
  5. González-Fernández, Carlos; Dorda, Ricardo; Negueruela, Ignacio; Marco, Amparo (2015). "A new survey of cool supergiants in the Magellanic Clouds". Astronomy & Astrophysics. 578: A3. arXiv:1504.00003. Bibcode:2015A&A...578A...3G. doi:10.1051/0004-6361/201425362. S2CID 55959019.
  6. Levesque, E. M.; Massey, P.; Olsen, K. A. G.; Plez, B.; Meynet, G.; Maeder, A. (2006). "The Effective Temperatures and Physical Properties of Magellanic Cloud Red Supergiants: The Effects of Metallicity". The Astrophysical Journal. 645 (2): 1102–1117. arXiv:astro-ph/0603596. Bibcode:2006ApJ...645.1102L. doi:10.1086/504417. S2CID 5150686.
  7. Dicenzo, Brooke; Levesque, Emily M. (2019). "Atomic Absorption Line Diagnostics for the Physical Properties of Red Supergiants". The Astronomical Journal. 157 (4): 167. arXiv:1902.01862. Bibcode:2019AJ....157..167D. doi:10.3847/1538-3881/ab01cb. S2CID 119076156.


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