Psi1 Aurigae
Location of ψ1 Aurigae (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga
Right ascension 06h 24m 53.90155s[1]
Declination +49° 17′ 16.4112″[1]
Apparent magnitude (V) 4.91[2]
Characteristics
Spectral type K5-M1Iab-Ib[3]
U−B color index +2.29[2]
B−V color index +1.97[2]
R−I color index 1.07
Variable type LC[4]
Astrometry
Radial velocity (Rv)+4.7[5] km/s
Proper motion (μ) RA: –0.155[1] mas/yr
Dec.: –2.131[1] mas/yr
Parallax (π)0.4426 ± 0.1103 mas[1]
Distanceapprox. 7,000 ly
(approx. 2,300 pc)
Absolute magnitude (MV)−5.53[6]
Details
Mass14.4 ± 0.8[7] M☉
Radius726[8] R☉
Luminosity63,579[9] L☉
Temperature3,750[10] K
Metallicity [Fe/H]+0.08[11] dex
Age12.3 ± 0.4[7] Myr
Other designations
46 Aurigae, BD+49 1488, FK5 242, HD 44537, HIP 30520, HR 2289, SAO 41076[12]
Database references
SIMBADdata

Psi1 Aurigae (ψ1 Aur, ψ1 Aurigae) is a star in the northern constellation of Auriga. It is faintly visible to the naked eye with an apparent visual magnitude of 4.91.[2] Based upon a measured annual parallax shift of 0.44 mas,[1] it is approximately 7,500 light-years (2,300 parsecs) distant from the Earth. It is receding from the Sun with a radial velocity of +4.7 km/s.[5]

A visual band light curve for Psi1 Aurigae, adapted from Percy et al. (2001)[13]

This is a massive supergiant star with a stellar classification of K5-M1Iab-Ib.[3] It is a slow irregular variable of the LC type, with its brightness varying in magnitude by 0.44.[4] The star is more than 14[7] times as massive as the Sun and is blazing with 63,579[9] times the Sun's luminosity. This energy is being radiated into outer space from its outer atmosphere at an effective temperature of 3,750 K,[10] giving it the orange-red hue of a cool M-type star.

See also

References

  1. 1 2 3 4 5 6 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. 1 2 3 4 Nicolet, B. (1978), "Photoelectric photometric Catalogue of homogeneous measurements in the UBV System", Astronomy and Astrophysics Supplement Series, 34: 1–49, Bibcode:1978A&AS...34....1N.
  3. 1 2 Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins Catalog of Revised MK Types for the Cooler Stars", The Astrophysical Journal Supplement Series, 71: 245, Bibcode:1989ApJS...71..245K, doi:10.1086/191373.
  4. 1 2 Adelman, Saul J. (2001), "Stars with the Largest Hipparcos Photometric Amplitudes", Baltic Astronomy, 10 (4): 589–593, Bibcode:2001BaltA..10..589A, doi:10.1515/astro-2001-0403, S2CID 116386247.
  5. 1 2 Wielen, R.; et al. (1999), "Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions", Veroeffentlichungen des Astronomischen Rechen-Instituts Heidelberg, Astronomisches Rechen-Institut Heidelberg, 35 (35): 1, Bibcode:1999VeARI..35....1W.
  6. ↑ Schiavon, Ricardo P. (July 2007), "Population Synthesis in the Blue. IV. Accurate Model Predictions for Lick Indices and UBV Colors in Single Stellar Populations", The Astrophysical Journal Supplement Series, 171 (1): 146–205, arXiv:astro-ph/0611464, Bibcode:2007ApJS..171..146S, doi:10.1086/511753, S2CID 13946698.
  7. 1 2 3 Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (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.
  8. ↑ Stassun K.G.; et al. (October 2019), "The revised TESS Input Catalog and Candidate Target List", The Astronomical Journal, 158 (4): 138, arXiv:1905.10694, Bibcode:2019AJ....158..138S, doi:10.3847/1538-3881/ab3467, S2CID 166227927.
  9. 1 2 Hohle, M. M.; Neuhäuser, R.; Schutz, B. F. (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.
  10. 1 2 Levesque, Emily M.; et al. (August 2005), "The Effective Temperature Scale of Galactic Red Supergiants: Cool, but Not As Cool As We Thought", The Astrophysical Journal, 628 (2): 973–985, arXiv:astro-ph/0504337, Bibcode:2005ApJ...628..973L, doi:10.1086/430901, S2CID 15109583.
  11. ↑ Bakos, Gustav A. (October 1971), "Abundances of Heavy Elements in Late-Type Stars", Journal of the Royal Astronomical Society of Canada, 65: 222, Bibcode:1971JRASC..65..222B.
  12. ↑ "psi01 Aur", SIMBAD, Centre de données astronomiques de Strasbourg, retrieved 2012-08-23.
  13. ↑ Percy, John R.; Wilson, Joseph B.; Henry, Gregory W. (August 2001), "Long-Term VRI Photometry of Small-Amplitude Red Variables. I. Light Curves and Periods", Publications of the Astronomical Society of the Pacific, 113 (786): 983–996, Bibcode:2001PASP..113..983P, doi:10.1086/322153, S2CID 14609175.
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