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Zeta Persei

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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 measuremets of its Ca II lines place it at 1,300 light-years (400 parsecs).[5]

ζ Persei
Location of ζ Persei (circled)
Observation data
Epoch J2000      Equinox J2000
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 mas/yr[1]
Dec.: –9.141 mas/yr[1]
Parallax (π)3.8556 ± 0.4169 mas[1]
Distance1,300±200 ly
(400±64 pc)[5]
Absolute magnitude (MV)−4.55±0.1[6]
Details
Mass14.5 ± 1.9[7] M☉
Radius26–27[8] R☉
Luminosity47,039[7] L☉
Temperature20,800[7] K
Rotational velocity (v sin i)40[3] km/s
Age12.6 ± 1.5[9] Myr
Other designations
44 Per, FK5 144, HD 24398, HIP 18246, HR 1203, SAO 56799.[10]
Database references
SIMBADdata

Description

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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[8] times the Sun's radius and 13–16 times the Sun's mass.[7] 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,[7] 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

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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

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References

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  1. ^ a b c d e Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  2. ^ a b c d Lutz, T. E.; Lutz, J. H. (June 1977), "Spectral classification and UBV photometry of bright visual double stars", Astronomical Journal, 82: 431–434, Bibcode:1977AJ.....82..431L, doi:10.1086/112066
  3. ^ a b c Abt, Helmut A.; Levato, Hugo; Grosso, Monica (July 2002), "Rotational Velocities of B Stars", The Astrophysical Journal, 573 (1): 359–365, Bibcode:2002ApJ...573..359A, doi:10.1086/340590
  4. ^ a b 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, arXiv:astro-ph/0302428, Bibcode:2003A&A...402..587S, doi:10.1051/0004-6361:20030277, S2CID 15771155
  5. ^ a b 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. Bibcode:2009A&A...507..833M. doi:10.1051/0004-6361/20079144. ISSN 0004-6361.
  6. ^ R., Neuhäuser; G., Torres; M., Mugrauer; L., Neuhäuser, D.; J., Chapman; D., Luge; Matteo, Cosci (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 (in Italian). 516 (1). doi:10.1093/mnra (inactive 1 November 2024). hdl:10278/5003332. ISSN 0035-8711.{{cite journal}}: CS1 maint: DOI inactive as of November 2024 (link) CS1 maint: multiple names: authors list (link)
  7. ^ a b c d e 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, arXiv:1003.2335, Bibcode:2010AN....331..349H, doi:10.1002/asna.200911355, S2CID 111387483
  8. ^ a b Pasinetti-Fracassini, L. E.; et al. (February 2001) [November 2000 (arXiv)], "Catalogue of Stellar Diameters (CADARS)", Astronomy and Astrophysics, 367: 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754
  9. ^ 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
  10. ^ "zet Per -- Variable Star", SIMBAD, Centre de Données astronomiques de Strasbourg, retrieved 2012-01-12
  11. ^ "The Colour of Stars", Australia Telescope, Outreach and Education, Commonwealth Scientific and Industrial Research Organisation, December 21, 2004, archived from the original on 2013-12-03, 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, arXiv:astro-ph/0403155, Bibcode:2004MNRAS.351..552M, doi:10.1111/j.1365-2966.2004.07799.x, S2CID 17740309
  14. ^ Burnham, Robert (1978), Burnham's celestial handbook: an observer's guide to the universe beyond the solar system, Dover books explaining science, vol. 3 (2nd ed.), Courier Dover Publications, p. 1422, ISBN 0-486-23673-0
  15. ^ de Zeeuw, P. T.; et al. (January 1999), "A HIPPARCOS Census of the Nearby OB Associations", The Astronomical Journal, 117 (1): 354–399, arXiv:astro-ph/9809227, Bibcode:1999AJ....117..354D, doi:10.1086/300682, S2CID 16098861
  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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  • Kaler, James B., "Zeta Persei", Stars, University of Illinois, retrieved 2012-01-12
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