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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  mas [1]
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
SIMBAD data

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]

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. ^ 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.
  2. ^ 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.
  3. ^ 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.
  4. ^ 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.
  5. ^ 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
  6. ^ 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.
  7. ^ 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.
  8. ^ 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.
  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, S2CID  14878976.
  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, S2CID  118629873
  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, S2CID  189848223
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