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 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
Radius2,000[3] R☉
Luminosity900,000[3][a] L☉
Temperature4,000[3] 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,[4] which was similar to the outburst V838 Monocerotis experienced in 2002.[3] At peak brightness, M31-RV was the most luminous red supergiant in the Local Group.[4] 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.[5]

  1. ^ a b c d Cite error: The named reference arxiv1 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference arxiv2 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference evans was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Rich was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Kochanek2014 was 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).