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V Crucis is a carbon star in the constellation Crux. A Mira variable, its apparent magnitude ranges from 8.7 to 11.1 over 376.5 days.[4] The fact that this star's period is nearly equal to one year makes it hard to get good observational coverage over the entire cycle. Its near-infrared light curve shows a contribution from the first harmonic of the fundamental period.[9]

V Crucis

The visual band light curve of V Crucis, from AAVSO data[1]
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Crux
Right ascension 12h 56m 35.559s[2]
Declination −57° 53′ 57.02″[2]
Apparent magnitude (V) 8.74 - 11.13[3]
Characteristics
Spectral type Ce(Ne)[4]
Variable type Mira[4]
Astrometry
Radial velocity (Rv)−19.90[5] km/s
Proper motion (μ) RA: 0.507[2] mas/yr
Dec.: 1.989[2] mas/yr
Parallax (π)0.7451 ± 0.0475 mas[2]
Distance4,400 ± 300 ly
(1,340 ± 90 pc)
Absolute magnitude (MV)-4.67[6]
Details
Radius130[2] R☉
Luminosity7,244[7] L☉
Temperature3,075[7] K
Other designations
V Cru, CD−57°4791, HD 112319, HIP 63175, IRAS 12536-5737, 2MASS J12563556-5753569[8]
Database references
SIMBADdata

References


  1. "Download Data". aavso.org. AAVSO. Retrieved 1 October 2021.
  2. 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. Gaia DR2 record for this source at VizieR.
  3. Pojmanski, G. (2002). "The All Sky Automated Survey. Catalog of Variable Stars. I. 0 h - 6 hQuarter of the Southern Hemisphere". Acta Astronomica. 52: 397–427. arXiv:astro-ph/0210283. Bibcode:2002AcA....52..397P.
  4. "V Crucis". AAVSO Website. American Association of Variable Star Observers. 4 January 2010. Retrieved 2019-12-11.
  5. Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.
  6. Guandalini, R.; Cristallo, S. (2013). "Luminosities of carbon-rich asymptotic giant branch stars in the Milky Way". Astronomy and Astrophysics. 555: A120. arXiv:1305.4203. Bibcode:2013A&A...555A.120G. doi:10.1051/0004-6361/201321225. S2CID 54918450.
  7. Bergeat, J.; Knapik, A.; Rutily, B. (2002). "Carbon-rich giants in the HR diagram and their luminosity function". Astronomy and Astrophysics. 390 (3): 967–986. Bibcode:2002A&A...390..967B. doi:10.1051/0004-6361:20020525.
  8. "V Cru". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-12-11.
  9. Whitelock, P. A.; Feast, M. W.; Marang, F.; Overbeek, M. D. (June 1997). "Mass-loss variations among carbon-rich AGB variables". Monthly Notices of the Royal Astronomical Society. 288 (2): 512–532. doi:10.1093/mnras/288.2.512. Retrieved 3 June 2022.


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