Wikipedia
4 Persei
4 Persei is a single[10] star in the northern constellation of Perseus, located around 670 light years away from the Sun.[1] It is visible to the naked eye as a faint, blue-white hued star with an apparent visual magnitude of 5.04[2] The Bayer designation for this star is g Persei; 4 Persei is the Flamsteed designation. This object has a peculiar velocity of 26.3 km/s and may be a runaway star.[11]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Perseus |
| Right ascension | 02h 02m 18.11081s[1] |
| Declination | 54° 29′ 15.1488″[1] |
| Apparent magnitude (V) | 5.04[2] |
| Characteristics | |
| Spectral type | B8 III[3] |
| U−B color index | −0.32[2] |
| B−V color index | −0.08[2] |
| Astrometry | |
| Radial velocity (Rv) | −2.30[4] km/s |
| Proper motion (μ) | RA: +32.886[1] mas/yr Dec.: −3.515[1] mas/yr |
| Parallax (π) | 4.2743 ± 0.1856 mas[1] |
| Distance | 760 ± 30 ly (230 ± 10 pc) |
| Absolute magnitude (MV) | −1.75[5] |
| Details | |
| Radius | 3.2[6] R☉ |
| Luminosity | 670[5] L☉ |
| Surface gravity (log g) | 4.19[7] cgs |
| Temperature | 12,230[7] K |
| Metallicity [Fe/H] | +0.30[7] dex |
| Rotational velocity (v sin i) | 60[8] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
The stellar classification for 4 Persei is B8 III,[3] matching an aging B-type giant star that has evolved off the main sequence. It is spinning with a projected rotational velocity of 60 km/s[8] and has about 3.2[6] times the Sun's radius The star is radiating 670[5] times the luminosity of the Sun from its photosphere at an effective temperature of 12,230 K.[7] 4 Persei is embedded in a small, relatively dense dust cloud, which is resulting in infrared emission from the cold dust.[12]
References edit
- ^ a b c d e f 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. Gaia DR2 record for this source at VizieR.
- ^ a b c d 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.
- ^ a b Hoffleit, D.; Warren, W. H. (1995). "VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)". VizieR On-line Data Catalog: V/50. Originally Published in: 1964BS....C......0H. 5050. Bibcode:1995yCat.5050....0H.
- ^ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.
- ^ a b c 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. Vizier catalog entry
- ^ a b Pasinetti Fracassini, L. E.; Pastori, L.; Covino, S.; Pozzi, A. (February 2001). "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)". Astronomy and Astrophysics. 367 (Third ed.): 521–524. arXiv:astro-ph/0012289. Bibcode:2001A&A...367..521P. doi:10.1051/0004-6361:20000451. S2CID 425754.
- ^ a b c d Wu, Yue; Singh, H. P.; Prugniel, P.; Gupta, R.; Koleva, M. (2010). "Coudé-feed stellar spectral library – atmospheric parameters". Astronomy & Astrophysics. 525: A71. arXiv:1009.1491. Bibcode:2011A&A...525A..71W. doi:10.1051/0004-6361/201015014. S2CID 53480665.
- ^ a b Abt, Helmut A.; Levato, Hugo; Grosso, Monica (2002). "Rotational Velocities of B Stars". The Astrophysical Journal. 573 (1): 359–365. Bibcode:2002ApJ...573..359A. doi:10.1086/340590.
- ^ "4 Per". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-03-27.
- ^ Eggleton, P. P.; Tokovinin, A. A. (2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
- ^ 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
- ^ Tovmassian, H. M.; et al. (February 1995), "Dust Shells of Distant Young Stars", Astrophysics and Space Science, 224 (1–2): 577–578, Bibcode:1995Ap&SS.224..577T, doi:10.1007/BF00667963, S2CID 189848223