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19 Aurigae

19 Aurigae

A light curve for 19 Aurigae, adapted from Chistyakov and Sokolov (1999)[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga
Right ascension 05h 20m 00.92110s[2]
Declination +33° 57′ 28.9949″[2]
Apparent magnitude (V) 5.05[3]
Characteristics
Evolutionary stage bright giant
Spectral type A5 II+[4]
B−V color index 0.287±0.004[3]
Astrometry
Radial velocity (Rv)−4.3±0.9[3] km/s
Proper motion (μ) RA: −0.264[2] mas/yr
Dec.: −3.415[2] mas/yr
Parallax (π)0.8596 ± 0.0950 mas[2]
Distanceapprox. 3,800 ly
(approx. 1,200 pc)
Details
Mass7.8±0.5[5] M☉
Radius15[6] R☉
Luminosity (bolometric)7,057[7] L☉
Surface gravity (log g)2.10±0.25[8] cgs
Temperature8,300±100[8] K
Metallicity [Fe/H]−0.19[3] dex
Rotational velocity (v sin i)8.0[9] km/s
Age36.0±2.9[5] Myr
Other designations
19 Aur, NSV 1925, BD+33°1013, GC 6515, HD 34578, HIP 24879, HR 1740, SAO 57906[10]
Database references
SIMBADdata

19 Aurigae is a single[11] star located approximately 3,800 light years away from the Sun in the northern constellation Auriga. It is visible to the naked eye as a faint, white-hued star with an apparent visual magnitude of 5.05.[3] The star is moving closer to the Earth with a heliocentric radial velocity of 4.3 km/s.[3]

This is an evolved A-type bright giant star with a stellar classification of A5 II+.[4] It is a variable star of unknown type that ranges in magnitude from 5.03 down to 5.09.[1] This star is an estimated 36[5] million years old with a projected rotational velocity of 8 km/s.[9] It has 8[5] times the mass of the Sun and about 15[6] times the Sun's radius. 19 Aurigae is radiating 7,057[7] times the total luminosity of the Sun from its photosphere at an effective temperature of 8,300 K.[8]

References

  1. ^ a b Chistyakov, Yu. N.; Sokolov, N. A. (November 1999), "On the Variability of 19 Aurigae as Observed by the Hipparcos Satellite", Information Bulletin on Variable Stars, 4808: 1, Bibcode:1999IBVS.4808....1C.
  2. ^ 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.
  3. ^ a b c d e f 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.
  4. ^ a b Gray, R. O.; et al. (2001), "The Physical Basis of Luminosity Classification in the Late A-, F-, and Early G-Type Stars. I. Precise Spectral Types for 372 Stars", The Astronomical Journal, 121 (4): 2148, Bibcode:2001AJ....121.2148G, doi:10.1086/319956.
  5. ^ a b c d Tetzlaff, N.; et al. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun", Monthly Notices of the Royal Astronomical Society, 410 (1): 190–200, arXiv:1007.4883, Bibcode:2011MNRAS.410..190T, doi:10.1111/j.1365-2966.2010.17434.x, S2CID 118629873.
  6. ^ a b Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics, 367 (Third ed.): 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754.
  7. ^ a b Hohle, M. M.; et al. (April 2010), "Masses and luminosities of O- and B-type stars and red supergiants", Astronomische Nachrichten, 331 (4): 349, arXiv:1003.2335, Bibcode:2010AN....331..349H, doi:10.1002/asna.200911355, S2CID 111387483.
  8. ^ a b c Lyubimkov, Leonid S.; et al. (February 2010), "Accurate fundamental parameters for A-, F- and G-type Supergiants in the solar neighbourhood", Monthly Notices of the Royal Astronomical Society, 402 (2): 1369–1379, arXiv:0911.1335, Bibcode:2010MNRAS.402.1369L, doi:10.1111/j.1365-2966.2009.15979.x, S2CID 119096173.
  9. ^ a b Lyubimkov, Leonid S.; et al. (2015), "Carbon abundance and the N/C ratio in atmospheres of A-, F- and G-type supergiants and bright giants", Monthly Notices of the Royal Astronomical Society, 446 (4): 3447, arXiv:1411.2722, Bibcode:2015MNRAS.446.3447L, doi:10.1093/mnras/stu2299
  10. ^ "19 Aur". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-05-21.
  11. ^ 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.
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