AW Canum Venaticorum

A light curve for AW Canum Venaticorum, plotted from Hipparcos data[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Canes Venatici
Right ascension 13h 51m 47.47504s[2]
Declination +34° 26′ 39.2474″[2]
Apparent magnitude (V) 4.76[3] (4.73 – 4.85)[4]
Characteristics
Spectral type M3- IIIa[5]
B−V color index 1.611±0.006[3]
Variable type Lb[4]
Astrometry
Radial velocity (Rv)−44.21±0.25[3] km/s
Proper motion (μ) RA: −20.477[2] mas/yr
Dec.: −31.626[2] mas/yr
Parallax (π)5.2734 ± 0.2529 mas[2]
Distance620 ± 30 ly
(190 ± 9 pc)
Absolute magnitude (MV)−1.56[3]
Details
Mass2.18±0.16[6] M☉
Radius117.41+4.25
−4.57[6] R☉
Luminosity2,387±213[6] L☉
Surface gravity (log g)0.98±0.30[7] cgs
Temperature3,529±25[7] K
Metallicity [Fe/H]−0.09±0.11[7] dex
Age1.11±0.21[6] Gyr
Other designations
AW CVn, BD+35° 2496, FK5 3102, HD 120933, HIP 67665, HR 5219, SAO 63793[8]
Database references
SIMBADdata

AW Canum Venaticorum is a variable star[4] in the constellation Canes Venatici. It is visible to the naked eye with a nominal apparent visual magnitude of 4.76.[3] The distance to this star, as measured from its annual parallax shift of 5.3 mas,[2] is around 620 light years. It is moving closer with a heliocentric radial velocity of −44 km/s.[3]

At the age of 1.1 billion years,[6] this is an evolved red giant star with a stellar classification of M3- IIIa.[5] It is a slow irregular variable of type Lb, with a brightness that ranges between magnitudes 4.73 and 4.85.[4] The star has 2.2[6] times the mass of the Sun and has expanded to 117[6] times the Sun's radius. It is radiating 2,387[6] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 3,529 K.[7]

References

  1. ↑ "Hipparcos Tools Interactive Data Access". Hipparcos. ESA. Retrieved 8 December 2021.
  2. 1 2 3 4 5 6 Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051.
  3. 1 2 3 4 5 6 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
  4. 1 2 3 4 Samus', N. N; Kazarovets, E. V; Durlevich, O. V; Kireeva, N. N; Pastukhova, E. N (2017), "General catalogue of variable stars: Version GCVS 5.1", Astronomy Reports, 61 (1): 80–88, Bibcode:2017ARep...61...80S, doi:10.1134/S1063772917010085, S2CID 125853869.
  5. 1 2 Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins catalog of revised MK types for the cooler stars", Astrophysical Journal Supplement Series, 71: 245, Bibcode:1989ApJS...71..245K, doi:10.1086/191373, S2CID 123149047.
  6. 1 2 3 4 5 6 7 8 Baines, Ellyn K.; et al. (2018), "Fundamental Parameters of 87 Stars from the Navy Precision Optical Interferometer", The Astronomical Journal, 155 (1), 30, arXiv:1712.08109, Bibcode:2018AJ....155...30B, doi:10.3847/1538-3881/aa9d8b, S2CID 119427037.
  7. 1 2 3 4 Prugniel, P.; et al. (2011), "The atmospheric parameters and spectral interpolator for the MILES stars", Astronomy & Astrophysics, 531: A165, arXiv:1104.4952, Bibcode:2011A&A...531A.165P, doi:10.1051/0004-6361/201116769, S2CID 54940439.
  8. ↑ "HD 120933". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 24 August 2018.
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