Astronomy:36 Persei

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Short description: Star in the constellation Perseus
36 Persei
Location of 36 Persei (circled)
Observation data
Equinox J2000.0]] (ICRS)
Constellation Perseus
Right ascension  03h 32m 26.25926s[1]
Declination 46° 03′ 24.7016″[1]
Apparent magnitude (V) 5.32[2]
Characteristics
Evolutionary stage main sequence[3][1]
Spectral type F4III[4]
U−B color index −0.02[2]
B−V color index +0.41[2]
Astrometry
Radial velocity (Rv)−47.5[5] km/s
Proper motion (μ) RA: −53.125[1] mas/yr
Dec.: −74.839[1] mas/yr
Parallax (π)26.0579 ± 0.0776[1] mas
Distance125.2 ± 0.4 ly
(38.4 ± 0.1 pc)
Absolute magnitude (MV)2.50[6]
Details
Mass1.40[7] M☉
Radius2.17[7] R☉
Luminosity8.3[7] L☉
Surface gravity (log g)3.91[7] cgs
Temperature6,655[7] K
Metallicity [Fe/H]0.05[8] dex
Rotational velocity (v sin i)28.0[9] km/s
Age1.81[8] Gyr
Other designations
36 Per, NSV 1182, BD+45°778, FK5 2249, GC 4210, HD 21770, HIP 16499, HR 1069, SAO 38924[10]
Database references
SIMBADdata

36 Persei is a solitary,[11] variable star located 121 light years away from the Sun in the northern constellation of Perseus. It is visible to the naked eye as a dim, yellow-white hued point of light with a baseline apparent visual magnitude of 5.32.[2] The star is drifting closer to the Sun with a heliocentric radial velocity of −47.5 km/s,[5] and may come as close as 36.6 light-years in 661,000 years.[6]

The stellar classification of 36 Persei is F4III,[4] matching an aging giant star that has used up its core hydrogen. This object is used by astronomers as a spectral standard for stars with a similar class.[12] The star is a suspected variable of unknown type, ranging in visual magnitude from 5.29 down to 5.33,[13] and is a source of X-ray emission.[14] The star is 1.8 billion years old[8] with a projected rotational velocity of 28 km/s.[9] It has an estimated 1.4 times the mass of the Sun and has not yet expanded significantly, having 2.2 times the Sun's girth. The star is radiating 8.3 times the luminosity of the Sun from its photosphere at an effective temperature of 6,655 K.[7]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues 2237. Bibcode: 2002yCat.2237....0D. 
  3. ↑ Wallerstein, George; Bohm-Vitense, Erika; Vanture, Andrew D.; Gonzalez, Guillermo (1994). "The Lithium Content and Other Properties of F2-G5 Giants in the Hertzsprung Gap". The Astronomical Journal 107: 2211. doi:10.1086/117031. Bibcode: 1994AJ....107.2211W. 
  4. ↑ 4.0 4.1 Ljunggren, B.; Oja, T. (1961). "The Uppsala spectral classification". Uppsala Astronomical Observatory Annual 4 (10): 10. Bibcode: 1961UppAn...4j...1L. 
  5. ↑ 5.0 5.1 Casagrande, L. et al. (June 2011). "New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey". Astronomy and Astrophysics 530: A138. doi:10.1051/0004-6361/201016276. Bibcode: 2011A&A...530A.138C. 
  6. ↑ 6.0 6.1 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A.  Vizier catalog entry
  7. ↑ 7.0 7.1 7.2 7.3 7.4 7.5 Stassun, Keivan G. et al. (2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. Bibcode: 2019AJ....158..138S. 
  8. ↑ 8.0 8.1 8.2 Aguilera-Gómez, Claudia; Ramírez, Iván; Chanamé, Julio (2018). "Lithium abundance patterns of late-F stars: An in-depth analysis of the lithium desert". Astronomy and Astrophysics 614: A55. doi:10.1051/0004-6361/201732209. Bibcode: 2018A&A...614A..55A. 
  9. ↑ 9.0 9.1 De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (2014). "A catalog of rotational and radial velocities for evolved stars". Astronomy & Astrophysics 561: A126. doi:10.1051/0004-6361/201220762. Bibcode: 2014A&A...561A.126D.  Vizier catalog entry
  10. ↑ "36 Per". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=36+Per. 
  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. doi:10.1111/j.1365-2966.2008.13596.x. Bibcode: 2008MNRAS.389..869E. 
  12. ↑ Garcia, B. (1989). "A list of MK standard stars". Bulletin d'Information du Centre de Données Stellaires 36: 27. Bibcode: 1989BICDS..36...27G. 
  13. ↑ Samus, N. N. et al. (2017), "General Catalogue of Variable Stars", Astronomy Reports, 5.1 61 (1): 80–88, doi:10.1134/S1063772917010085, Bibcode: 2017ARep...61...80S. 
  14. ↑ Haakonsen, Christian Bernt; Rutledge, Robert E. (September 2009). "XID II: Statistical Cross-Association of ROSAT Bright Source Catalog X-ray Sources with 2MASS Point Source Catalog Near-Infrared Sources". The Astrophysical Journal Supplement 184 (1): 138–151. doi:10.1088/0067-0049/184/1/138. Bibcode: 2009ApJS..184..138H. 



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