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Psi9 Aurigae

From Wikipedia, the free encyclopedia
Star in the constellation Auriga
For other stars with a similarBayer designation, seeψ Aurigae.
Psi9 Aurigae
Location of ψ9 Aurigae (circled)
Observation data
Epoch J2000      Equinox J2000
ConstellationAuriga
Right ascension06h 56m 32.05797s[1]
Declination+46° 16′ 26.3957″[1]
Apparent magnitude (V)5.75[2]
Characteristics
Spectral typeB8 IIIe[3]
U−Bcolor index−0.46[4]
B−Vcolor index−0.06[4]
Astrometry
Radial velocity (Rv)−41.1[5] km/s
Proper motion (μ)RA: −3.263[1]mas/yr
Dec.: +5.040[1]mas/yr
Parallax (π)3.4481±0.0560 mas[1]
Distance950 ± 20 ly
(290 ± 5 pc)
Absolute magnitude (MV)−2.03[6]
Details
Mass2.4[7] M☉
Radius3.7[2] R☉
Luminosity868[6] L☉
Surface gravity (log g)2.71[7] cgs
Temperature9,573[7] K
Metallicity [Fe/H]−0.55[8] dex
Rotational velocity (v sin i)235[9] km/s
Other designations
ψ9 Aur,BD+46 1203,HD 50658,HIP 33377,HR 2568,SAO 41446[10]
Database references
SIMBADdata

Psi9 Aurigae,Latinised from ψ9 Aurigae, is astar in thenorthernconstellation ofAuriga. It is dimly visible to the naked eye with anapparent visual magnitude of 5.75. Based upon an annualparallax shift of2.59 mas the distance to this star is approximately 950light-years (290parsecs).

Thespectrum of Psi9 Aurigae matches agiant star with astellar classification of B8 IIIe.[3] The 'e' suffix indicates this is aBe star that shows emission lines of hydrogen in its spectrum. This is caused by acircumstellar shell of hot gas. The emission undergoes variability on a time scale of sixteen years.[3]

References

[edit]
  1. ^abcdeVallenari, 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 atVizieR.
  2. ^abPasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics",Astronomy and Astrophysics,367 (2):521–524,arXiv:astro-ph/0012289,Bibcode:2001A&A...367..521P,doi:10.1051/0004-6361:20000451,S2CID 425754.
  3. ^abcGhosh, K. K. (September 1989), "Search for rapid spectral variability in Psi(9) Aurigae",Publications of the Astronomical Society of the Pacific,101:839–843,Bibcode:1989PASP..101..839G,doi:10.1086/132504.
  4. ^abCrawford, D. L. (February 1963), "U, b, v, and Hβ Photometry for the Bright B8- and B9-TYPE Stars",Astrophysical Journal,137: 530,Bibcode:1963ApJ...137..530C,doi:10.1086/147526.
  5. ^Wilson, Ralph Elmer (1953), "General Catalogue of Stellar Radial Velocities",Carnegie Institute Washington D.C. Publication, Washington: Carnegie Institution of Washington,Bibcode:1953GCRV..C......0W.
  6. ^abAnderson, 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.
  7. ^abcStassun, Keivan G.; Oelkers, Ryan J.; Pepper, Joshua; Paegert, Martin; De Lee, Nathan; Torres, Guillermo; Latham, David W.; Charpinet, Stéphane; Dressing, Courtney D.; Huber, Daniel; Kane, Stephen R.; Lépine, Sébastien; Mann, Andrew; Muirhead, Philip S.; Rojas-Ayala, Bárbara; Silvotti, Roberto; Fleming, Scott W.; Levine, Al; Plavchan, Peter; the TESS Target Selection Working Group (2018), "The TESS Input Catalog and Candidate Target List",The Astronomical Journal,156 (3): 102,arXiv:1706.00495,Bibcode:2018AJ....156..102S,doi:10.3847/1538-3881/aad050.
  8. ^Cardiel, Nicolás; Zamorano, Jaime; Carrasco, Josep Manel; Masana, Eduard; Bará, Salvador; González, Rafael; Izquierdo, Jaime; Pascual, Sergio; Sánchez De Miguel, Alejandro (2021), "RGB photometric calibration of 15 million Gaia stars",Monthly Notices of the Royal Astronomical Society,507 (1): 318,arXiv:2107.08734,Bibcode:2021MNRAS.507..318C,doi:10.1093/mnras/stab2124.
  9. ^Abt, Helmut A.; Levato, Hugo; Grosso, Monica (July 2002), "Rotational Velocities of B Stars",The Astrophysical Journal,573 (1):359–365,Bibcode:2002ApJ...573..359A,doi:10.1086/340590.
  10. ^"* psi09 Aur".SIMBAD.Centre de données astronomiques de Strasbourg. Retrieved2012-08-23.

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