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]

4 Persei
Location of 4 Persei (circled)
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[1] mas
Distance760 ± 30 ly
(230 ± 10 pc)
Absolute magnitude (MV)-1.75[5]
Details
Radius3.2[6] R☉
Luminosity670[5] L☉
Surface gravity (log g)4.19[7] cgs
Temperature12,230[7] K
Metallicity [Fe/H]+0.30[7] dex
Rotational velocity (v sin i)60[8] km/s
Other designations
g Persei, 4 Per, BD+53°439, FK5 1054, GC 2442, HD 12303, HIP 9505, HR 590, SAO 22859[9]
Database references
SIMBADdata

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
  1. 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.
  2. 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. 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.
  4. Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
  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. Vizier catalog entry
  6. 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 (Third ed.). 367: 521–524. arXiv:astro-ph/0012289. Bibcode:2001A&A...367..521P. doi:10.1051/0004-6361:20000451.
  7. 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.
  8. Abt, Helmut A.; Levato, Hugo; Grosso, Monica (2002). "Rotational Velocities of B Stars". The Astrophysical Journal. 573: 359. Bibcode:2002ApJ...573..359A. doi:10.1086/340590.
  9. "4 Per". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-03-27.
  10. 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.
  11. 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
  12. 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
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