Astronomy:34 Persei

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Short description: Binary star system in the constellation Perseus
34 Persei
Perseus constellation map.svg
Red circle.svg
Location of 34 Persei (circled)
Observation data
Equinox J2000.0]] (ICRS)
Constellation Perseus
Right ascension  03h 29m 22.05019s[1]
Declination 49° 30′ 32.2114″[1]
Apparent magnitude (V) 4.67[2] (4.76 + 7.18)[3]
Characteristics
Spectral type B3V[4]
U−B color index −0.57[5]
B−V color index −0.09[5]
Astrometry
Radial velocity (Rv)−3.50[6] km/s
Proper motion (μ) RA: +22.20[1] mas/yr
Dec.: −29.49[1] mas/yr
Parallax (π)6.05 ± 0.36[1] mas
Distance540 ± 30 ly
(165 ± 10 pc)
Absolute magnitude (MV)−1.62[2]
Details
32 Per A
Mass6.9±0.1[7] M
Radius3.1[8] R
Luminosity671[2] L
Surface gravity (log g)4.076[9] cgs
Temperature16,421[9] K
Rotational velocity (v sin i)200[9] km/s
Age29.3±3.4[7] Myr
Other designations
34 Per, BD+49°945, FK5 1549, GC 4133, HD 21428, HIP 16244, HR 1044, SAO 38872, CCDM J03294+4931AB, WDS J03294+4931AB[10]
Database references
SIMBADdata

34 Persei is a binary star[3] system in the northern constellation of Perseus. It is visible to the naked eye as a faint, blue-white hued point of light with a combined apparent visual magnitude of 4.67.[2] The system is located approximately 540 light years away from the Sun based on parallax,[1] but it is drifting closer with a radial velocity of −3.5 km/s.[6] It is a likely member of the Alpha Persei Cluster.[11]

The primary member, designated component A, is a B-type main-sequence star with a stellar classification of B3V[4] and visual magnitude 4.76.[3] It is an estimated 29[7] million years old with a high rate of spin, showing a projected rotational velocity of 200 km/s.[9] The star has 6.9[7] times the mass of the Sun and about 3.1[8] times the Sun's radius. It is radiating 671[2] times the Sun's luminosity from its photosphere at an effective temperature of 16,421 K.[9]

The secondary companion, component B, has an angular separation of 0.6 from the primary and visual magnitude of 7.34.[12]

References

  1. 1.0 1.1 1.2 1.3 1.4 1.5 Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode2007A&A...474..653V.  Vizier catalog entry
  2. 2.0 2.1 2.2 2.3 2.4 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode2012AstL...38..331A.  Vizier catalog entry
  3. 3.0 3.1 3.2 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. Bibcode2008MNRAS.389..869E. 
  4. 4.0 4.1 Hoffleit, D.; Warren, W. H. (1995). "Bright Star Catalogue". VizieR On-line Data Catalog: V/50. Originally Published in: 1964BS....C......0H 5050. Bibcode1995yCat.5050....0H. 
  5. 5.0 5.1 Mallama, A. (2014). "Sloan Magnitudes for the Brightest Stars". The Journal of the American Association of Variable Star Observers 42 (2): 443. Bibcode2014JAVSO..42..443M. Vizier catalog entry
  6. 6.0 6.1 Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759–771. doi:10.1134/S1063773706110065. Bibcode2006AstL...32..759G. 
  7. 7.0 7.1 7.2 7.3 Tetzlaff, N. et al. (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. doi:10.1111/j.1365-2966.2010.17434.x. Bibcode2011MNRAS.410..190T. 
  8. 8.0 8.1 Pasinetti Fracassini, L. E. et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics 367 (2): 521–524, doi:10.1051/0004-6361:20000451, Bibcode2001A&A...367..521P 
  9. 9.0 9.1 9.2 9.3 9.4 David, Trevor J.; Hillenbrand, Lynne A. (2015). "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets". The Astrophysical Journal 804 (2): 146. doi:10.1088/0004-637X/804/2/146. Bibcode2015ApJ...804..146D. 
  10. "34 Per". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=34+Per. 
  11. Zuckerman, B. et al. (June 2012). "Stellar Membership and Dusty Debris Disks in the α Persei Cluster". The Astrophysical Journal 752 (1): 12. doi:10.1088/0004-637X/752/1/58. 58. Bibcode2012ApJ...752...58Z. 
  12. Mason, Brian D. et al. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal 122 (6): 3466. doi:10.1086/323920. Bibcode2001AJ....122.3466M.  Vizier catalog entry