V343 Carinae

This article is about d Carinae. For D Carinae, see HD 66591.
V343 Carinae

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]
Distance1,440 ± 70 ly
(440 ± 20 pc)
Absolute magnitude (MV)−3.91[3]
Details
Mass12.5±0.6[6] M☉
Luminosity6,322.92[3] L☉
Temperature27,600±3,630[7] K
Age15.7±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
SIMBADdata

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]

  1. ^ Cite error: The named reference MAST was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  3. ^ a b c d e f g h Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference houk1979 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Samus2017 was invoked but never defined (see the help page).
  6. ^ a b c d Cite error: The named reference Tetzlaff2011 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Sokolov1995 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference vanHoof1973 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Waelkens1983 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Koen2002 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference chini2012 was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference WDSC2014 was invoked but never defined (see the help page).