Astronomy:Zeta Persei

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Short description: Star in the constellation Perseus
ζ Persei
Location of ζ Persei (circled)
Observation data
Equinox J2000.0]] (ICRS)
Constellation Perseus
Right ascension  03h 54m 07.92143s[1]
Declination +31° 53′ 01.0869″[1]
Apparent magnitude (V) 2.86[2]
Characteristics
Evolutionary stage Blue supergiant
Spectral type B1 Ib[3]
U−B color index –0.72[2]
B−V color index +0.10[2]
Astrometry
Radial velocity (Rv)20.1 ± 1.2[4] km/s
Proper motion (μ) RA: +7.274[1] mas/yr
Dec.: –9.141[1] mas/yr
Parallax (π)3.8556 ± 0.4169[1] mas
Distance1,300±200 ly
(400±64 pc)
Absolute magnitude (MV)−4.55±0.1[5]
Details
Mass14.5 ± 1.9[6] M☉
Radius26–27[7] R☉
Luminosity47,039[6] L☉
Temperature20,800[6] K
Rotational velocity (v sin i)40[3] km/s
Age12.6 ± 1.5[8] Myr
Other designations
ζ Per, 44 Per, BD+31 666, FK5 144, HD 24398, HIP 18246, HR 1203, SAO 56799[9]
Database references
SIMBADdata

Zeta Persei (ζ Per, ζ Persei) is a star in the northern constellation of Perseus. With an apparent visual magnitude of 2.9,[2] it can be readily seen with the naked eye. Parallax measurements place it at a distance of about 846 light-years (259 parsecs) from Earth,[1] though measurements of its Ca II lines place it at 1,300 light-years (400 parsecs).[10]

Description

This is a lower luminosity supergiant star with a stellar classification of B1 Ib.[3] This is an enormous star, with an estimated 26–27[7] times the Sun's radius and 13–16 times the Sun's mass.[6] It has about 47,000 times the luminosity of the Sun and it is radiating this energy at an effective temperature of 20,800 K,[6] giving it the blue-white hue of a B-type star.[11] The spectrum displays anomalously high levels of carbon.[12] Zeta Persei has a strong stellar wind that is expelling 0.23×10−6 times the mass of the Sun per year, or the equivalent of the Sun's mass every 4.3 million years.[13]

Zeta Persei has a 9th magnitude companion at an angular separation of 12.9 arcseconds. The two stars have the same proper motion, so they may be physically associated. If so, they are separated by at least 4,000 Astronomical Units.[14] Zeta Persei is a confirmed member of the Perseus OB2 association (Per OB2), also called the Zeta Persei association, which is a moving group of stars that includes 17 massive, high luminosity members with spectral types of O or B, giving them a blue hue. These stars have a similar trajectory through space,[4] suggesting they originated in the same molecular cloud and are about the same age.[15]

Ambiguity

Some sources, including Starry Night (planetarium software), an atlas,[16] and a web site[17] attribute the name 'Atik' to Zeta Persei instead of nearby Omicron Persei.

See also

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 Lutz, T. E.; Lutz, J. H. (June 1977), "Spectral classification and UBV photometry of bright visual double stars", Astronomical Journal 82: 431–434, doi:10.1086/112066, Bibcode: 1977AJ.....82..431L 
  3. ↑ 3.0 3.1 3.2 Abt, Helmut A.; Levato, Hugo; Grosso, Monica (July 2002), "Rotational Velocities of B Stars", The Astrophysical Journal 573 (1): 359–365, doi:10.1086/340590, Bibcode: 2002ApJ...573..359A 
  4. ↑ 4.0 4.1 Steenbrugge, K. C. et al. (May 2003), "Radial velocities of early-type stars in the Perseus OB2 association", Astronomy and Astrophysics 402 (2): 587–605, doi:10.1051/0004-6361:20030277, Bibcode: 2003A&A...402..587S 
  5. ↑ Neuhäuser, R.; Torres, G.; Mugrauer, M.; Neuhäuser, D. L.; Chapman, J.; Luge, D.; Cosci, M. (2022), "Colour evolution of Betelgeuse and Antares over two millennia, derived from historical records, as a new constraint on mass and age", Monthly Notices of the Royal Astronomical Society 516 (1): 693, doi:10.1093/mnras/stac1969, Bibcode: 2022MNRAS.516..693N 
  6. ↑ 6.0 6.1 6.2 6.3 6.4 Hohle, M. M.; Neuhäuser, R.; Schutz, B. F. (April 2010), "Masses and luminosities of O- and B-type stars and red supergiants", Astronomische Nachrichten 331 (4): 349, doi:10.1002/asna.200911355, Bibcode: 2010AN....331..349H 
  7. ↑ 7.0 7.1 Pasinetti-Fracassini, L. E. et al. (February 2001), "Catalogue of Stellar Diameters (CADARS)", Astronomy and Astrophysics 367: 521–524, doi:10.1051/0004-6361:20000451, Bibcode: 2001A&A...367..521P 
  8. ↑ 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, doi:10.1111/j.1365-2966.2010.17434.x, Bibcode: 2011MNRAS.410..190T 
  9. ↑ "zet Per -- Variable Star", SIMBAD (Centre de Données astronomiques de Strasbourg), http://simbad.u-strasbg.fr/simbad/sim-id?Ident=Zeta+Persei, retrieved 2012-01-12 
  10. ↑ Megier, A.; Strobel, A.; Galazutdinov, G. A.; Krełowski, J. (2009-11-01), "The interstellar Ca II distance scale", Astronomy and Astrophysics 507 (2): 833–840, doi:10.1051/0004-6361/20079144, ISSN 0004-6361, Bibcode: 2009A&A...507..833M 
  11. ↑ "The Colour of Stars", Australia Telescope, Outreach and Education (Commonwealth Scientific and Industrial Research Organisation), December 21, 2004, http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html, retrieved 2012-01-16 
  12. ↑ Jaschek, M.; Jaschek, C. (December 1974), "The CNO stars", Astronomy and Astrophysics 36 (3): 401–408, Bibcode: 1974A&A....36..401J 
  13. ↑ Morel, T. et al. (June 2004), "Large-scale wind structures in OB supergiants: a search for rotationally modulated Hα variability", Monthly Notices of the Royal Astronomical Society 351 (2): 552–568, doi:10.1111/j.1365-2966.2004.07799.x, Bibcode: 2004MNRAS.351..552M 
  14. ↑ Burnham, Robert (1978), Burnham's celestial handbook: an observer's guide to the universe beyond the solar system, Dover books explaining science, 3 (2nd ed.), Courier Dover Publications, p. 1422, ISBN 0-486-23673-0, https://books.google.com/books?id=PJzIt3SIlkUC&pg=PA1422 
  15. ↑ de Zeeuw, P. T. et al. (January 1999), "A HIPPARCOS Census of the Nearby OB Associations", The Astronomical Journal 117 (1): 354–399, doi:10.1086/300682, Bibcode: 1999AJ....117..354D 
  16. ↑ Mullaney, James; Tirion, Wil (2009). The Cambridge Double Star Atlas, Chart 7. University Press, Cambridge. ISBN 978-0-521-49343-7. 
  17. ↑ Your Sky Object Catalogue: Named Stars



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