Astronomy:M31-RV

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M31-RV is a possible red cataclysmic variable star located in the Andromeda Galaxy (M31) that experienced an outburst in 1988,[1] which was similar to the outburst V838 Monocerotis experienced in 2002.[2] At peak brightness, M31-RV was the most luminous red supergiant in the Local Group.[1] 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.[3]

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.[4]

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.[5]

See also

Notes

References

  1. ↑ 1.0 1.1 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. https://articles.adsabs.harvard.edu/pdf/1989ApJ...341L..51R. Retrieved 10 October 2024. 
  2. ↑ 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. doi:10.1046/j.1365-8711.2003.06755.x. ISSN 0035-8711. Bibcode: 2003MNRAS.343.1054E. 
  3. ↑ Boschi, F.; Munari, U. (2004). "M 31-RV evolution and its alleged multi-outburst pattern". Astronomy and Astrophysics 418 (3): 869–875. doi:10.1051/0004-6361:20035716. Bibcode: 2004A&A...418..869B. 
  4. ↑ 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. doi:10.1088/0004-637X/737/1/17. Bibcode: 2011ApJ...737...17B. 
  5. ↑ Kochanek, C. S.; Adams, Scott M.; Belczynski, Krzysztof (2014). "Stellar mergers are common". Monthly Notices of the Royal Astronomical Society 443 (2): 1319. doi:10.1093/mnras/stu1226. Bibcode: 2014MNRAS.443.1319K. 




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