 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 J2000.0 | |
|---|---|
| Constellation | Andromeda |
| Right ascension | 00h 43m 02.433s[2] |
| Declination | 41° 12′ 56.17″[2] |
| Characteristics | |
| Evolutionary stage | M supergiant[1] |
| Spectral type | M0I-M7I[1] |
| Variable type | Luminous Red Nova |
| Details | |
| Radius | 2,000[3] R☉ |
| Luminosity | 900,000[3][a] L☉ |
| Temperature | 4,000[3] K |
| Other designations | |
M31 V1006, M31 V1007, McD 88 1 | |
| Database references | |
| SIMBAD | data |
M31-RV is a possible red cataclysmic variable star located in the Andromeda Galaxy (M31) that experienced an outburst in 1988, which is similar to the outburst V838 Monocerotis experienced in 2002.[3] 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.[2]
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.[4]
- ^ a b c d Cite error: The named reference
arxiv1was invoked but never defined (see the help page). - ^ a b c Cite error: The named reference
arxiv2was invoked but never defined (see the help page). - ^ 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.
- ^ Cite error: The named reference
Kochanek2014was invoked but never defined (see the help page).
Cite error: There are <ref group=lower-alpha> tags or {{efn}} templates on this page, but the references will not show without a {{reflist|group=lower-alpha}} template or {{notelist}} template (see the help page).