V343 Carinae

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V343 Carinae
V343CarLightCurve.png
A light curve for V343 Carinae, plotted from TESS data [1]
Observation data
Epoch J2000       Equinox J2000
Constellation Carina
Right ascension 08h 40m 37.02758s [2]
Declination −59° 45′ 39.6067″ [2]
Apparent magnitude  (V)4.31 [3]
Characteristics
Spectral type B1.5III [4]
B−V color index −0.117±0.005 [3]
Variable type Constant [5]
Astrometry
Radial velocity (Rv)+12.9±0.7 [3]  km/s
Proper motion (μ)RA: −6.63 [2]   mas/yr
Dec.: +5.32 [2]   mas/yr
Parallax (π)2.26 ± 0.11  mas [2]
Distance 1,440 ± 70  ly
(440 ± 20  pc)
Absolute magnitude  (MV)−3.91 [3]
Details
Mass 12.5±0.6 [6]   M☉
Luminosity 6,322.92 [3]   L☉
Temperature 27,600±3,630 [7]   K
Age 15.7±0.1 [6]   Myr
Other designations
d Car, V343 Car, CPD−59°1080, FK5  2685, GC  11964, HD  74375, HIP  42568, HR  3457, SAO  236181, CCDM J08406-5946, WDS J08406-5946A [8]
Database references
SIMBAD data

V343 Carinae is a blue-white star or star system in the southern constellation of Carina. It has the Bayer designation d Carinae, while V343 Carinae is a variable star designation. The star is visible to the naked eye with an apparent visual magnitude of 4.31. [3] The distance to this object is approximately 1,440  light years based on parallax. It is drifting further away with a radial velocity of +13 km/s. [3]

This star was originally thought to be a Beta Cephei variable and a suspected eclipsing binary [9] with an orbital period of 133.92 days. It is now considered as probably constant. [10] [5] Measurements indicate that at most it is a microvariable star with an amplitude of 0.0041 in visual magnitude and a period of 0.42029 cycles per day. [11] Eggleton and Tokovinin (2008) catalogued this as a single star, albeit with some uncertainty. [12] However, Chini et al. (2012) listed it as a single-lined spectroscopic binary system. [13]

The visible component of V343 Carinae has a stellar classification of B1.5III, [4] matching a massive blue giant. It has 12.5 [6] times the mass of the Sun and is an estimated 16 [6]  million years old. The star is radiating 6,323 [3] times the Sun's luminosity from its photosphere at an effective temperature of 27,600 K. [7] It has a visual magnitude 13.3 companion at an angular separation of 16.4″ along a position angle of 339°, as of 2010. [14]

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<span class="mw-page-title-main">V344 Carinae</span> Star in the constellation Carina

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References

  1. ↑ "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 8 December 2021.
  2. 1 2 3 4 5 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv: 0708.1752 , Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID   18759600.
  3. 1 2 3 4 5 6 7 8 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 Houk, Nancy; Cowley, A. P. (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 1, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H.
  5. 1 2 Samus, N. N.; et al. (2017), "General Catalogue of Variable Stars", Astronomy Reports, 5.1, 61 (1): 80–88, Bibcode:2017ARep...61...80S, doi:10.1134/S1063772917010085, S2CID   125853869.
  6. 1 2 3 4 Tetzlaff, N.; et al. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun", Monthly Notices of the Royal Astronomical Society, 410 (1): 190–200, arXiv: 1007.4883 , Bibcode:2011MNRAS.410..190T, doi:10.1111/j.1365-2966.2010.17434.x, S2CID   118629873.
  7. 1 2 Sokolov, N. A. (May 1995), "The determination of Teff of B, A and F main sequence stars from the continuum between 3200 A and 3600 A.", Astronomy and Astrophysics Supplement, 110: 553, Bibcode:1995A&AS..110..553S.
  8. ↑ "d Car". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 19 March 2016.
  9. ↑ van Hoof, A. (June 1973), "Six New Variable B-Stars", Information Bulletin on Variable Stars, 807: 1, Bibcode:1973IBVS..807....1V.
  10. ↑ Waelkens, C.; Rufener, F. (May 1983), "An observational study of the influence of close companions on the pulsations of beta Cephei stars", Astronomy and Astrophysics, 121: 45–50, Bibcode:1983A&A...121...45W.
  11. ↑ Koen, Chris; Eyer, Laurent (March 2002), "New periodic variables from the Hipparcos epoch photometry", Monthly Notices of the Royal Astronomical Society, 331 (1): 45–59, arXiv: astro-ph/0112194 , Bibcode:2002MNRAS.331...45K, doi:10.1046/j.1365-8711.2002.05150.x, S2CID   10505995.
  12. ↑ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv: 0806.2878 , Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID   14878976.
  13. ↑ Chini, R.; et al. (2012), "A spectroscopic survey on the multiplicity of high-mass stars", Monthly Notices of the Royal Astronomical Society, 424 (3): 1925, arXiv: 1205.5238 , Bibcode:2012MNRAS.424.1925C, doi:10.1111/j.1365-2966.2012.21317.x, S2CID   119120749.
  14. ↑ Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal, 122 (6): 3466, Bibcode:2001AJ....122.3466M, doi: 10.1086/323920 .
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