14 Aurigae

14 Aurigae

A visual band light curve for 14 Aurigae, adapted from Fitch and Wisniewski (1979)[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga
Right ascension 05h 15m 24.39398s[2]
Declination +32° 41′ 15.3638″[2]
Apparent magnitude (V) 5.01[3] (5.08 + 7.86)[4]
Characteristics
Spectral type A9IV + ? + F5V + M3V: + WDA[4]
U−B color index +0.19[5]
B−V color index +0.222±0.004[3]
Variable type δ Scuti[6]
Astrometry
Radial velocity (Rv)−9.3±0.2[3] km/s
Proper motion (μ) RA: −25.062[2] mas/yr
Dec.: +12.056[2] mas/yr
Parallax (π)12.1306 ± 0.1712 mas[2]
Distance269 ± 4 ly
(82 ± 1 pc)
Absolute magnitude (MV)0.31[3]
Details
14 Aur Aa
Mass1.64[7] M☉
Luminosity62.07[3] L☉
Surface gravity (log g)3.46[8] cgs
Temperature7,498[8] K
Metallicity [Fe/H]−0.02[3] dex
Rotation2.11 h[6]
Rotational velocity (v sin i)27.6[8] km/s
Age609[7] Myr
Other designations
14 Aur, KW Aurigae, AG+32° 492, BD+32° 922, GC 6411, HD 33959, HIP 24504, HR 1706, SAO 57799, ADS 3824, CCDM J05154+3242, TYC 2394-2028-1, GCRV 3112, GSC 02394-02028[9]
Database references
SIMBADdata

14 Aurigae is a quadruple star system located 269[2] light years away from the Sun in the zodiac constellation of Auriga. It has the variable star designation KW Aurigae, whereas 14 Aurigae is the Flamsteed designation.[9] It is visible to the naked eye as a faint, white-hued star with a combined apparent visual magnitude of 5.01.[3] The system is moving closer to the Sun with a heliocentric radial velocity of −9 km/s.[3]

The magnitude 5.08[4] primary member, designated component A, is a single-lined spectroscopic binary system in a circular orbit with a period of 3.7887 days.[10] The visible member has a stellar classification of A9 IV or A V, depending on the source,[11] and is a Delta Scuti variable with an amplitude of 0.08 magnitude and a period of 2.11 hours.[6] It is 609 million years old with 1.64 times the mass of the Sun.[7]

Component B lies about 10″ to the north of the primary and is merely a visual companion. However, component C, an F-type main sequence star of magnitude 7.86,[4] shares a common proper motion with component A and thus they form a system. This member is also a single-lined spectroscopic binary, having a period of 2.9934 days. The final member of the system, now designated component Cb, is a white dwarf star that is separated from the C, or rather Ca pair by 2″. If it is indeed bound to Ca, its orbital period is around 1,300 years.[11]

  1. ^ Cite error: The named reference Fitch 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 f g h Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  4. ^ a b c d Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference EgUBV was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference Solano1997 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference David2015 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference Schröder2009 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Simbad was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Pourbaix2004 was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference Barstow2001 was invoked but never defined (see the help page).