Astronomy:Kappa Volantis

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Short description: Quadruple star system in the constellation Volans
κ Volantis
Volans IAU.svg
Red circle.svg
Location of κ Volantis
Observation data
{{#ifeq:J2000.0|J2000.0 (ICRS)|Epoch J2000.0      Equinox J2000.0 (ICRS)| [[History:Epoch|Epoch J2000.0]]      [[Astronomy:Equinox (celestial coordinates)|Equinox J2000.0}}
Constellation Volans
κ1 Vol
Right ascension  08h 19m 48.96447s[1]
Declination −71° 30′ 53.6692″[1]
Apparent magnitude (V) 5.37[2]
κ2 Vol
Right ascension  08h 20m 00.52661s[1]
Declination −71° 30′ 19.3664″[1]
Apparent magnitude (V) 5.65[2]
Characteristics
κ1 Vol
Spectral type B9III/IV[3]
U−B color index −0.31[2]
B−V color index −0.06[2]
κ2 Vol
Spectral type B9/A0IV[3]
U−B color index −0.31[2]
B−V color index −0.10[2]
Astrometry
κ1 Vol
Radial velocity (Rv)36.0[4] km/s
Proper motion (μ) RA: −16.89[1] mas/yr
Dec.: +36.26[1] mas/yr
Parallax (π)7.50 ± 0.35[1] mas
Distance430 ± 20 ly
(133 ± 6 pc)
Absolute magnitude (MV)−0.29[5]
κ2 Vol
Radial velocity (Rv)−6.50[4] km/s
Proper motion (μ) RA: −17.71[1] mas/yr
Dec.: +34.10[1] mas/yr
Parallax (π)7.79 ± 0.21[1] mas
Distance420 ± 10 ly
(128 ± 3 pc)
Absolute magnitude (MV)+0.09[5]
Details
κ1 Vol
Mass2.7±0.3[6] M☉
Radius3.83±0.65[7] R☉
Luminosity129[8] L☉
Surface gravity (log g)3.77±0.09[6] cgs
Temperature9,884[8] K
Metallicity [Fe/H]−0.20+0.36
−0.25[6] dex
Rotational velocity (v sin i)80[9] km/s
κ2 Vol
Mass3.03[10] M☉
Radius3.01[10] R☉
Luminosity124[8] L☉
Surface gravity (log g)4.19[10] cgs
Temperature11,682[8] K
Metallicity [Fe/H]+0.69±0.15[11] dex
Rotation1.29641[12] d
Rotational velocity (v sin i)2[13] km/s
Age120[10] Myr
Other designations
κ Vol, WDS J08198-7131[14]
κ1 Vol: CPD−71°677, HD 71046, HIP 40817, HR 3301, SAO 256497[14]
κ2 Vol: CPD−71° 678, HD 71066, HIP 40834, HR 3302, SAO 256499.[15]
Database references
SIMBADκ1 Vol
κ2 Vol

Kappa Volantis, Latinized from κ Volantis, is a quadruple star system[16] in the southern constellation of Volans. The primary component has an apparent visual magnitude of 5.37, while the secondary companion is magnitude 5.65;[2] individually, both a bright enough to be faintly visible to the naked eye. Based upon parallax measurements, the stars appear to be around 420−430 light-years from the Sun.

Properties

The brightest component, κ1 Volantis, is a blue-white B-type star with a stellar classification showing characteristics of a both a subgiant and giant star. It has an unseen companion, and the pair form a single-lined spectroscopic binary.[16] The star has nearly three times the Sun's mass, and 3.8 times its radius. It radiates at 129 times the Sun's luminosity from its photosphere at an effective temperature of 9,884 K.

Companion

Separated from κ1 Volantis by 65 arcseconds, κ2 Volantis is a white subgiant star that falls between a B-type and A-type classification. The system's fourth component, κ Volantis C, is a magnitude +8.5 star 37.7 arcseconds away from κ2 Volantis.

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V. 
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Johnson, H. L. et al. (1999), "UBVRIJKL photometry of the bright stars", Commission Lunar and Planetary Laboratory 4: 99, Bibcode: 1966CoLPL...4...99J. 
  3. ↑ 3.0 3.1 Houk, Nancy; Cowley, A. P. (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, 1, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode: 1978mcts.book.....H. 
  4. ↑ 4.0 4.1 de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics 546: 14, doi:10.1051/0004-6361/201219219, A61, Bibcode: 2012A&A...546A..61D. 
  5. ↑ 5.0 5.1 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A. 
  6. ↑ 6.0 6.1 6.2 Anders, F. et al. (1 August 2019), "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18", Astronomy and Astrophysics 628: A94, doi:10.1051/0004-6361/201935765, ISSN 0004-6361, Bibcode: 2019A&A...628A..94A. 
  7. ↑ Stassun, Keivan G. et al. (1 September 2018), "The TESS Input Catalog and Candidate Target List", The Astronomical Journal 156 (3): 102, doi:10.3847/1538-3881/aad050, ISSN 0004-6256, Bibcode: 2018AJ....156..102S. 
  8. ↑ 8.0 8.1 8.2 8.3 McDonald, I. et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society 427 (1): 343–57, doi:10.1111/j.1365-2966.2012.21873.x, Bibcode: 2012MNRAS.427..343M. 
  9. ↑ Glebocki, R.; Gnacinski, P. (1 March 2005), "Systematic errors in the determination of stellar rotational velocities", 13th Cambridge Workshop on Cool Stars 560: 571, Bibcode: 2005ESASP.560..571G. 
  10. ↑ 10.0 10.1 10.2 10.3 Glagolevskij, Yu. V. (1 January 2019), "On Properties of Main Sequence Magnetic Stars", Astrophysical Bulletin 74 (1): 66–79, doi:10.1134/S1990341319010073, Bibcode: 2019AstBu..74...66G. 
  11. ↑ Ghazaryan, S.; Alecian, G.; Hakobyan, A. A. (1 November 2018), "New catalogue of chemically peculiar stars, and statistical analysis", Monthly Notices of the Royal Astronomical Society 480 (3): 2953–2962, doi:10.1093/mnras/sty1912, ISSN 0035-8711, Bibcode: 2018MNRAS.480.2953G. 
  12. ↑ Barraza, L. F.; Gomes, R. L.; Messias, Y. S.; Leão, I. C.; Almeida, L. A.; Janot-Pacheco, E.; Brito, A. C.; Brito, F. A. C. et al. (2022). "Rotation Signature of TESS B-type Stars. A Comprehensive Analysis". The Astrophysical Journal 924 (2): 117. doi:10.3847/1538-4357/ac3335. Bibcode: 2022ApJ...924..117B. 
  13. ↑ Hubrig, S.; Castelli, F.; Wahlgren, G. M. (1 June 1999), "Search for magnetic fields in HgMn stars by using relative strengths of multiplet 74 Fe II lines", Astronomy and Astrophysics 346: 139–145, ISSN 0004-6361, Bibcode: 1999A&A...346..139H. 
  14. ↑ 14.0 14.1 "kap01 Vol -- Star", SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), http://simbad.u-strasbg.fr/simbad/sim-id?Ident=kap01+Vol, retrieved 2016-09-05. 
  15. ↑ "kap02 Vol -- Star", SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), http://simbad.u-strasbg.fr/simbad/sim-id?Ident=kap02+Vol, retrieved 2016-09-05. 
  16. ↑ 16.0 16.1 Eggleton, P. P.; Tokovinin, A. A. (2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society 389 (2): 869, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E. 



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