PU Aurigae

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PU Aurigae
PUAurLightCurve.png
A light curve for PU Aurigae, plotted from Hipparcos data [1]
Observation data
Epoch J2000       Equinox J2000
Constellation Auriga
Right ascension 05h 18m 15.69826s [2]
Declination +42° 47′ 31.6133″ [2]
Apparent magnitude  (V)5.55 [3]
Characteristics
Spectral type M4 III [3]
B−V color index 1.492±0.012 [3]
Variable type Lb [4]
Astrometry
Radial velocity (Rv)−38.41±1.02 [3] km/s
Proper motion (μ)RA: +17.98 [5] mas/yr
Dec.: −30.61 [5] mas/yr
Parallax (π)5.7462±0.2309  mas [2]
Distance 570 ± 20  ly
(174 ± 7  pc)
Absolute magnitude  (MV)−0.63 [3]
Details
Radius 107 [6]   R☉
Luminosity 1,523 [6]   L☉
Temperature 3,482 [6]   K
Other designations
PU Aurigae , BD+42° 1239, HD 34269, HIP 24738, HR 1722, SAO 40214 [7]
Database references
SIMBAD data

PU Aurigae is an irregular variable star located in the constellation Auriga. A red giant, it varies by 0.1 magnitude around magnitude 5.64, [8] so it is faintly visible to the naked eye. Located around 560 light-years distant, it shines with a luminosity approximately 1,523 times that of the Sun and has a surface temperature of 3,482 K. [6]

Although the star was first found to be variable by Joel Stebbins and Charles Morse Huffer in 1928, [9] it was not given its variable star designation until 1977. [10]

References

  1. ↑ "Hipparcos Tools Interactive Data Access". Hipparcos. ESA. Retrieved 8 December 2021.
  2. 1 2 3 Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics . 616. A1. arXiv: 1804.09365 . Bibcode: 2018A&A...616A...1G . doi: 10.1051/0004-6361/201833051 .
  3. 1 2 3 4 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.
  4. ↑ Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
  5. 1 2 van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv: 0708.1752 , Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID   18759600.
  6. 1 2 3 4 McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (2012). "Fundamental Parameters and Infrared Excesses of Hipparcos Stars". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–57. arXiv: 1208.2037 . Bibcode:2012MNRAS.427..343M. doi: 10.1111/j.1365-2966.2012.21873.x . S2CID   118665352.
  7. ↑ "HD 34269". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 22 August 2018.
  8. ↑ Watson, Christopher (4 January 2010). "PU Aurigae". The International Variable Star Index. American Association of Variable Star Observers . Retrieved 17 June 2015.
  9. ↑ Stebbins, Joel; Huffer, C. M. (1928). "The Constancy of the Light of Red Stars". Publications of the Washburn Observatory. 15: 137–174. Bibcode:1928PWasO..15..137S . Retrieved 12 October 2024.
  10. ↑ Kukarkin, B. V.; Kholopov, P. N.; Fedorovich, V. P.; Kireyeva, N. N.; Kukarkina, N. P.; Medvedeva, G. I.; Perova, N. B. (March 1977). "62nd Name-List of Variable Stars" (PDF). Information Bulletin on Variable Stars. 1248: 1. Bibcode:1977IBVS.1248....1K . Retrieved 12 October 2024.


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