V344 Carinae

V344 Carinae

A light curve for V344 Carinae, plotted from TESS data[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Carina
Right ascension 08h 46m 42.54928s[2]
Declination −56° 46′ 11.1922″[2]
Apparent magnitude (V) 4.50[3] (4.40–4.51)[4]
Characteristics
Spectral type B3V(n)[5]
B−V color index −0.169±0.008[3]
Variable type Be[6]
Astrometry
Radial velocity (Rv)+27.0±7.4[3] km/s
Proper motion (μ) RA: −9.29[2] mas/yr
Dec.: +8.85[2] mas/yr
Parallax (π)5.39 ± 0.14 mas[2]
Distance610 ± 20 ly
(186 ± 5 pc)
Absolute magnitude (MV)−1.84[3]
Details
Mass7.1±0.1[7] M☉
Radius3.00±0.06[8] R☉
Luminosity2,328+120
−105[9] L☉
Surface gravity (log g)3.79±0.18[9] cgs
Temperature17,660±560[9] K
Rotational velocity (v sin i)268±18[9] km/s
Age31.6±3.9[7] Myr
Other designations
f Car, V344 Car, CPD−56°1865, FK5 2695, GC 12138, HD 75311, HIP 43105, HR 3498, SAO 236268[10]
Database references
SIMBADdata

V344 Carinae is a single[11] star in the southern constellation of Carina. It has the Bayer designation f Carinae, while V344 Carinae is its variable star designation. This star has a blue-white hue and is visible to the naked eye with an apparent visual magnitude that fluctuates around 4.50.[3] Historically, it was mentioned in the Almagest, suggesting that some time around 130 BCE it was brighter than its current magnitude.[12] This object is located at a distance of approximately 610 light-years from the Sun based on parallax.[2] The star is drifting further away with a radial velocity of around +27 km/s.[3]

This is a B-type main-sequence star with a stellar classification of B3V(n).[5] It is a Be star; a rapidly rotating star that is hosting a circumstellar disk of hot, decreted gas.[13] It is a photometrically variable Be star, having a brightness that ranges from 4.4 down to 4.51 in visual magnitude, and has been classified as a Gamma Cassiopeiae variable.[4] The star is 32[7] million years old and is spinning with a projected rotational velocity of 268 km/s.[9] It has seven[7] times the mass of the Sun and around 3.0[8] times the Sun's radius. The star is radiating 2,328[9] times the luminosity of the Sun from its photosphere at an effective temperature of 17,660 K.[9]

  1. ^ Cite error: The named reference MAST was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  3. ^ a b c d e f Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference vsx was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference houk1979 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Samus2017 was invoked but never defined (see the help page).
  7. ^ a b c d Cite error: The named reference Tetzlaff2011 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Arcos2018 was invoked but never defined (see the help page).
  9. ^ a b c d e f g Cite error: The named reference Zorec2016 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Hertzog1984 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Touhami2011 was invoked but never defined (see the help page).