V376 Carinae

This article is about b1 Carinae. For b2 Carinae, see HD 77370. For B Carinae, see HR 3220.
Not to be confused with β Carinae.
V376 Carinae

A light curve for V376 Carinae, plotted from TESS data[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Carina
Right ascension 08h 56m 58.41666s[2]
Declination −59° 13′ 45.6032″[2]
Apparent magnitude (V) 4.69[3] (4.87 + 6.58)[4]
Characteristics
Spectral type B2V[5] + B9.5V[3]
B−V color index −0.182±0.004[6]
Astrometry
Radial velocity (Rv)+26.8±2.8[6] km/s
Proper motion (μ) RA: −8.409±0.406[2] mas/yr
Dec.: +8.421±0.322[2] mas/yr
Parallax (π)5.0495 ± 0.1667 mas[2]
Distance650 ± 20 ly
(198 ± 7 pc)
Absolute magnitude (MV)−1.64[6]
Details
A
Mass7.8±0.1[7] M☉
Luminosity (bolometric)2,998[8] L☉
Temperature21,150[8] K
Age12.5±1.6[7] Myr
Other designations
b1 Car, V376 Carinae, CD−58°1301, FK5 1233, GC 12405, HD 77002, HIP 43937, HR 3582, SAO 236436, CCDM J08570-5914, WDS J08570-5914[9]
Database references
SIMBADdata

V376 Carinae is a binary star[3] system in the southern constellation of Carina. It has the Bayer designation b1 Carinae; V376 Carinae is the variable star designation. The system is visible to the naked eye as a faint point of light with a combined apparent magnitude of +4.69.[3] The distance to this system from the Sun is approximately 650 light years based on parallax.[2] It is drifting further away with a radial velocity of +27 km/s.[6]

The magnitude 4.87[4] primary, designated component A, is a B-type main-sequence star with a stellar classification of B2V.[5] During a search for Beta Cephei variables in the southern sky, it was initially classed as a very short period variable.[10] However, this variability was not confirmed by subsequent observations.[11] Samus et al. (2017) now suspect it is a constant star that was assigned a variable designation in haste.[12] It has an estimated age of 12.5 million years with 7.8 times the mass of the Sun.[7] The star is radiating nearly three thousand times the Sun's luminosity from its photosphere at an effective temperature of 21,150 K.[8]

The companion star, component B, was discovered by Scottish astronomer James Dunlop in 1836.[4] It has a class of B9.5V[3] with an apparent magnitude of +6.58. As of 2010, the secondary had an angular separation of 40.1″ from the primary along a position angle of 76°.[4]

  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 GaiaDR2 was invoked but never defined (see the help page).
  3. ^ a b c d e Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  4. ^ a b c d Cite error: The named reference WDSC2014 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. ^ a b c d Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference Tetzlaff2011 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference Hohle2010 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Jakate1979 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Balona1982 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Samus2017 was invoked but never defined (see the help page).