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M31 RV

M31 RV

Light curves for M31 RV, adapted from Boschi and Munari (2004).[1] The red dots show the red band magnitude, and the blue dots show the blue band magnitude.
Observation data
Epoch J2000.0      Equinox ICRS
Constellation Andromeda[2]
Right ascension 00h 43m 02.433s[3]
Declination +41° 12′ 56.17″[3]
Characteristics
Evolutionary stage M supergiant[1]
Spectral type M0I-M7I[1]
Variable type Luminous Red Nova
Details
Radius2,000 during outburst[4] R☉
Luminosity900,000 during outburst[4][a] L☉
Temperature4,000 during outburst[4] K
Other designations
M31 V1006, M31 V1007, McD 88 1
Database references
SIMBADdata

M31 RV is a possible red cataclysmic variable star located in the Andromeda Galaxy (M31) that experienced an outburst in 1988,[5] which was similar to the outburst V838 Monocerotis experienced in 2002.[4] At peak brightness, M31 RV was the most luminous red supergiant in the Local Group.[5] Such objects have been called luminous red novae or intermediate-luminosity red transients. During the outburst, both V838 Mon and M31 RV reached a maximum absolute visual magnitude of -9.8.[1]

In 2006, the area around M31 RV was observed using the Hubble Space Telescope, but only red giants were seen. Most likely the star either became too dim for Hubble to see, the star is a companion of one of the red giants, or the star is one of the red giants themselves.[3]

M31 RV reached a peak visual magnitude of 17 before fading rapidly and showing dust formation. The most likely explanation states that these outbursts occur during stellar merger events.[6]

See also

Notes

  1. ^ Calculated using the Stefan-Boltzmann Law using the given values for radius and temperature in the reference

References

  1. ^ a b c d Boschi, F.; Munari, U. (2004). "M 31-RV evolution and its alleged multi-outburst pattern". Astronomy and Astrophysics. 418 (3): 869–875. arXiv:astro-ph/0402313. Bibcode:2004A&A...418..869B. doi:10.1051/0004-6361:20035716. S2CID 18582562.
  2. ^ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.
  3. ^ a b c Bond, Howard E. (2011). "Hubble Space Telescope Imaging of the Outburst Site of M31 RV. II. No Blue Remnant in Quiescence". The Astrophysical Journal. 737 (1): 17. arXiv:1105.4595. Bibcode:2011ApJ...737...17B. doi:10.1088/0004-637X/737/1/17. S2CID 118561097.
  4. ^ a b c d Evans, A.; Geballe, T. R.; Rushton, M. T.; Smalley, B.; van Loon, J. T.; Eyres, S. P. S.; Tyne, V. H. (2003-08-11). "V838 Mon: an L supergiant?". Monthly Notices of the Royal Astronomical Society. 343 (3): 1054–1056. Bibcode:2003MNRAS.343.1054E. doi:10.1046/j.1365-8711.2003.06755.x. ISSN 0035-8711.
  5. ^ a b Rich, R. Michael; Mould, Jeremy; Picard, Alain; Frogel, Jay A.; Davies, Roger (June 1989). "Luminous M Giants in the Bulge of M31". Astrophysical Journal Letters. 341: L51. doi:10.1086/185455.
  6. ^ Kochanek, C. S.; Adams, Scott M.; Belczynski, Krzysztof (2014). "Stellar mergers are common". Monthly Notices of the Royal Astronomical Society. 443 (2): 1319. arXiv:1405.1042. Bibcode:2014MNRAS.443.1319K. doi:10.1093/mnras/stu1226. S2CID 118617376.
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