AF Andromedae

AF Andromedae

A red band light curve for AF Andromedae, adapted from Joshi et al. (2019)[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Andromeda
Right ascension 00h 43m 33.086s[2]
Declination +41° 49′ 10.31″[2]
Characteristics
Spectral type LBV
U−B color index ~ −0.9[3]
B−V color index ~ +0.1[3]
Variable type LBV[4]
Astrometry
Radial velocity (Rv)−152±9[5] km/s
Proper motion (μ) RA: 0.088[2] mas/yr
Dec.: −0.076[2] mas/yr
Parallax (π)−0.0026 ± 0.0674 mas
Distance~2.5Mly ly
(~780kpc pc)
Absolute magnitude (MV)−8.2[6]
Details
Mass50-120[7] M☉
Radius63[4] R☉
Luminosity1,500,000[6] L☉
Temperature33,000±3,000 K (normal)
7,000 (outburst)[8] K
Other designations
AF Andromedae, AF And, HV 4013, 2MASS 00433308+4112103, Var 19
Database references
SIMBADdata

AF Andromedae (AF And) is a luminous blue variable (LBV), a type of variable star. The star is one of the most luminous variables in M31, the Andromeda Galaxy.

  1. ^ Cite error: The named reference Joshi was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference edr3 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference humphreys was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference szeivert was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference humphreys1975 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference humphreys2017 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference burggraf was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference joshi2019 was invoked but never defined (see the help page).