Omega Aurigae

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Omega Aurigae
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga[1]
Right ascension Template:RA[2]
Declination Template:DEC[2]
Apparent magnitude (V) 4.95[3]
Characteristics
Evolutionary stage main sequence[4]
Spectral type A1 V[5]
U−B Template:Engvar +0.01[3]
B−V Template:Engvar +0.05[3]
R−I Template:Engvar 0.03
Astrometry
Radial velocity (Rv)+7.7±2.5[6] km/s
Proper motion (μ) RA: +45.340 mas/yr[2]
Dec.: −97.647 mas/yr[2]
Parallax (π)20.1236±0.2385 mas[2]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)+1.34[1]
Details
ω Aur A
MassScript error: No such module "val".[4] Template:Solar mass
Radius2.0[7] Template:Solar radius
Luminosity27[1] Template:Solar luminosity
Surface gravity (log g)4.33[5] cgs
Temperature9,230[5] K
Metallicity [Fe/H]−0.12[5] dex
Rotational velocity (v sin i)107[8] km/s
Age317[9] Myr
ω Aur B
Mass1.1[10] Template:Solar mass
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[11]
Database references
SIMBADdata

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Omega Aurigae is a double star[12] in the northern constellation of Auriga. Its name is a Bayer designation that is Latinized from ω Aurigae, and abbreviated Omega Aur or ω Aur. This star has a combined apparent visual magnitude of 4.95,[3] which is bright enough to be seen with the naked eye. The distance to this system, as determined using parallax measurements, is approximately Script error: No such module "convert"..[2] It is receding from the Sun with a radial velocity of +8 km/s.[6] The system is a member of the Columba group of co-moving stars.[13]

The primary component is an A-type main sequence star with a stellar classification of A1 V.[5] It is 317[9] million years old with a high rate of spin, showing a projected rotational velocity of 107 km/s.[8] The star has 2.3[4] times the mass of the Sun and double[7] the Sun's radius. It is radiating 27[1] times the Sun's luminosity from its photosphere at an effective temperature of 9,230 K.[5] The object displays an infrared excess, suggesting an orbiting debris disk with a temperature of 20 K at a mean radius of Script error: No such module "val". from the host star.[7]

There is a magnitude 8.18 companion at an angular separation of Script error: No such module "val". along a position angle of 4.30°. This corresponds to a physical separation of Script error: No such module "val"..[10] The system is an X-ray source with a luminosity of Script error: No such module "val"..[14]

References

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  1. ↑ a b c d Template:Cite XHIP
  2. ↑ a b c d e Template:Cite Gaia DR3
  3. ↑ a b c d Script error: No such module "citation/CS1".
  4. ↑ a b c Script error: No such module "citation/CS1".
  5. ↑ a b c d e f Script error: No such module "citation/CS1".
  6. ↑ a b Script error: No such module "citation/CS1".
  7. ↑ a b c Script error: No such module "citation/CS1".
  8. ↑ a b Script error: No such module "citation/CS1".
  9. ↑ a b Script error: No such module "citation/CS1".
  10. ↑ a b Script error: No such module "citation/CS1".
  11. ↑ Template:Cite simbad
  12. ↑ Script error: No such module "citation/CS1".
  13. ↑ Script error: No such module "citation/CS1".
  14. ↑ Script error: No such module "citation/CS1".

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External links

Template:Stars of Auriga

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