Astronomy:36 Persei
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| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Perseus |
| Right ascension | 03h 32m 26.25886s[1] |
| Declination | 46° 03′ 24.7029″[1] |
| Apparent magnitude (V) | 5.32[2] |
| Characteristics | |
| Spectral type | F4III[3] |
| U−B color index | −0.02[2] |
| B−V color index | +0.41[2] |
| Astrometry | |
| Radial velocity (Rv) | −47.5[4] km/s |
| Proper motion (μ) | RA: −52.829[1] mas/yr Dec.: −74.915[1] mas/yr |
| Parallax (π) | 26.9895 ± 0.1053[1] mas |
| Distance | 120.8 ± 0.5 ly (37.1 ± 0.1 pc) |
| Absolute magnitude (MV) | 2.50[5] |
| Details | |
| Mass | 1.50[4] M☉ |
| Radius | 2.28+0.13 −0.09[1] R☉ |
| Luminosity | 8.585±0.042[1] L☉ |
| Surface gravity (log g) | 3.94[4] cgs |
| Temperature | 6,546+126 −176[1] K |
| Metallicity [Fe/H] | −0.17[4] dex |
| Rotational velocity (v sin i) | 28.0[6] km/s |
| Age | 2.20[4] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
36 Persei is a solitary,[8] 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,[4] and may come as close as 36.6 light-years in 661,000 years.[5]
The stellar classification of 36 Persei is F4III,[3] 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.[9] The star is a suspected variable of unknown type, ranging in visual magnitude from 5.29 down to 5.33,[10] and is a source of X-ray emission.[11] The star is 2.2[4] billion years old with a projected rotational velocity of 28 km/s.[6] It has an estimated 1.5[4] times the mass of the Sun and has not yet expanded significantly, having 2.3[1] times the Sun's girth. The star is radiating 8.6[1] times the luminosity of the Sun from its photosphere at an effective temperature of 6,546 [1]
References
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 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.
- ↑ 3.0 3.1 Ljunggren, B.; Oja, T. (1961). "The Uppsala spectral classification". Uppsala Astronomical Observatory Annual 4 (10): 10. Bibcode: 1961UppAn...4j...1L.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 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.
- ↑ 5.0 5.1 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
- ↑ 6.0 6.1 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
- ↑ "36 Per". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=36+Per.
- ↑ 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.
- ↑ Garcia, B. (1989). "A list of MK standard stars". Bulletin d'Information du Centre de Données Stellaires 36: 27. Bibcode: 1989BICDS..36...27G.
- ↑ 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.
- ↑ 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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