Nu Aurigae

Variable star in the constellation Auriga
ν Aurigae
Location of ν Aurigae (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga
Right ascension 05h 51m 29.36946s[1]
Declination +39° 08′ 54.6861″[1]
Apparent magnitude (V) 3.957[2]
Characteristics
Spectral type G9.5 III Fe1 Ba0.2 + wd[3]
U−B color index +1.084[2]
B−V color index +1.138[2]
R−I color index 0.56
Astrometry
Radial velocity (Rv)+9.92 ± 0.14[4] km/s
Proper motion (μ) RA: +7.958 mas/yr[1]
Dec.: +0.713 mas/yr[1]
Parallax (π)16.1414 ± 0.4427 mas[1]
Distance202 ± 6 ly
(62 ± 2 pc)
Absolute magnitude (MV)−0.27[5]
Details
Mass2.12[6] M☉
Radius17.85+0.51
−0.53[7] R☉
Luminosity126±8[7] L☉
Surface gravity (log g)2.4[4] cgs
Temperature4,576±50[7] K
Metallicity [Fe/H]–0.14[4] dex
Rotational velocity (v sin i)5.0[4] km/s
Age1.11[6] Gyr
Other designations
ν Aur, 32 Aurigae, ADS 4440, BD+39 1429, FK5 221, HD 39003, HIP 27673, HR 2012, SAO 58502.[8]
Database references
SIMBADdata

Nu Aurigae, Latinised from ν Aurigae, is the Bayer designation for a star in the northern constellation of Auriga. It is visible to the naked eye with an apparent visual magnitude of 3.96[2] and is approximately 200 light-years (61 parsecs) distant from the Earth.[1] This is an evolved giant star with a stellar classification of G9.5 III.[9] It is a red clump star, which indicates that it is generating energy through the fusion of helium at its core.[10] The outer envelope has expanded to 18 times the radius of the Sun and cooled to 4,576 K,[7] giving it the characteristic yellow-hued glow of a G-type star.[11] It shines with 126 times the luminosity of the Sun.[7]

This is an astrometric binary with a suspected white dwarf companion.[3] A 10th-magnitude star 54.6 arcseconds away is an optical companion.

See also

References

  1. ^ a b c d e Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  2. ^ a b c d Oja, T. (August 1986), "UBV photometry of stars whose positions are accurately known. III", Astronomy and Astrophysics Supplement Series, 65 (2): 405–409, Bibcode:1986A&AS...65..405O.
  3. ^ a b Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
  4. ^ a b c d Massarotti, Alessandro; et al. (January 2008), "Rotational and Radial Velocities for a Sample of 761 HIPPARCOS Giants and the Role of Binarity", The Astronomical Journal, 135 (1): 209–231, Bibcode:2008AJ....135..209M, doi:10.1088/0004-6256/135/1/209.
  5. ^ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
  6. ^ a b Luck, R. Earle (2015), "Abundances in the Local Region. I. G and K Giants", Astronomical Journal, 150 (3), 88, arXiv:1507.01466, Bibcode:2015AJ....150...88L, doi:10.1088/0004-6256/150/3/88, S2CID 118505114.
  7. ^ a b c d e Baines, Ellyn K.; Thomas Armstrong, J.; Clark, James H.; Gorney, Jim; Hutter, Donald J.; Jorgensen, Anders M.; Kyte, Casey; Mozurkewich, David; Nisley, Ishara; Sanborn, Jason; Schmitt, Henrique R.; Van Belle, Gerard T. (2021). "Angular Diameters and Fundamental Parameters of Forty-four Stars from the Navy Precision Optical Interferometer". The Astronomical Journal. 162 (5): 198. arXiv:2211.09030. Bibcode:2021AJ....162..198B. doi:10.3847/1538-3881/ac2431.
  8. ^ "* 32 Aur". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2012-08-19.
  9. ^ Eggen, O. J. (1962), "Space-velocity vectors for 3483 stars with proper motion and radial velocity", Royal Observatory Bulletin, 51: 79, Bibcode:1962RGOB...51...79E.
  10. ^ Valentini, M.; Munari, U. (November 2010), "A spectroscopic survey of faint, high-Galactic-latitude red clump stars. I. The high resolution sample", Astronomy and Astrophysics, 522: A79, arXiv:1007.0207, Bibcode:2010A&A...522A..79V, doi:10.1051/0004-6361/201014870, S2CID 119156545.[permanent dead link]
  11. ^ "The Colour of Stars". Australia Telescope, Outreach and Education. Commonwealth Scientific and Industrial Research Organisation. December 21, 2004. Archived from the original on December 3, 2013. Retrieved 2012-01-16.

External links

  • HR 2012
  • CCDM J05515+3909
  • Image Nu Aurigae
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