Astronomy:Zeta Sculptoris

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Short description: Star in the constellation Sculptor
ζ Sculptoris
Sculptor constellation map.svg
Red circle.svg
Location of ζ Sculptoris (circled)
Observation data
Equinox J2000.0]] (ICRS)
Constellation Sculptor
Right ascension  00h 02m 19.92035s[1]
Declination −29° 43′ 13.4873″[1]
Apparent magnitude (V) 5.04[2]
Characteristics
Spectral type B5 V[3]
U−B color index -0.55[4]
B−V color index -0.16[4]
Astrometry
Radial velocity (Rv)+8.6±1.6[5] km/s
Proper motion (μ) RA: +9.34[1] mas/yr
Dec.: +14.50[1] mas/yr
Parallax (π)6.49 ± 0.25[1] mas
Distance500 ± 20 ly
(154 ± 6 pc)
Absolute magnitude (MV)−0.89[2]
Orbit[6]
Period (P)1,740±22 d
Eccentricity (e)0.316±0.043
Periastron epoch (T)2453381 ± 37 JD
Argument of periastron (ω)
(secondary)		43.5±6.9°
Semi-amplitude (K1)
(primary)		12.4±0.6 km/s
Details
Mass5.5[7] M☉
Luminosity496[2] L☉
Temperature16,100[3] K
Metallicity [Fe/H]0.00[8] dex
Rotation1.75222[9] d
Rotational velocity (v sin i)15[10] km/s
Other designations
Database references
SIMBADdata

Zeta Sculptoris, Latinized from ζ Sculptoris, is a multiple star system in the constellation Sculptor. It is faintly visible to the naked eye with an apparent magnitude of 5.04.[2] The annual parallax shift is 6.49 mas, which yields a distance estimate of about 500 light years from the Sun. It is moving further away with a radial velocity of +8.6 km/s.[5] Zeta Sculptoris is near the Blanco 1 cluster as viewed from Earth, although parallax measurements indicate it to be substantially closer.[6]

The primary component, designated Zeta Sculptoris A, is a single-lined, low amplitude spectroscopic binary system with an orbital period of 4.8 years and an eccentricity of 0.32.[6] The visible member of this pair is a B-type main-sequence star with a stellar classification of B5 V.[3] It has a 13th magnitude companion, Zeta Sculptoris B, at an angular separation of 3 arcseconds along a position angle of 330° (as of 1927).[11] According to Eggleton and Tokovinin (2008), it is most likely gravitationally bound to the primary component.[12]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V.  Vizier catalog entry
  2. ↑ 2.0 2.1 2.2 2.3 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A.  Vizier catalog entry
  3. ↑ 3.0 3.1 3.2 Zorec, J.; Cidale, L.; Arias, M. L.; Frémat, Y.; Muratore, M. F.; Torres, A. F.; Martayan, C. (2009). "Fundamental parameters of B supergiants from the BCD system". Astronomy and Astrophysics 501 (1): 297–320. doi:10.1051/0004-6361/200811147. Bibcode: 2009A&A...501..297Z. 
  4. ↑ 4.0 4.1 Mallama, A. (2014). "Sloan Magnitudes for the Brightest Stars". The Journal of the American Association of Variable Star Observers 42 (2): 443. Bibcode: 2014JAVSO..42..443M. Vizier catalog entry
  5. ↑ 5.0 5.1 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. Bibcode: 2006AstL...32..759G. 
  6. ↑ 6.0 6.1 6.2 González, J. F.; Levato, H. (November 2009), "Spectroscopic study of the open cluster Blanco 1", Astronomy and Astrophysics 507 (1): 541–547, doi:10.1051/0004-6361/200912772, Bibcode: 2009A&A...507..541G 
  7. ↑ Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (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.  Vizier catalog entry
  8. ↑ Gontcharov, G. A. (2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters 38 (12): 771–782. doi:10.1134/S1063773712120031. Bibcode: 2012AstL...38..771G.  Vizier catalog entry
  9. ↑ Barraza, L. F.; Gomes, R. L.; Messias, Y. S.; Leão, I. C.; Almeida, L. A.; Janot-Pacheco, E.; Brito, A. C.; Brito, F. A. C. et al. (2022). "Rotation Signature of TESS B-type Stars. A Comprehensive Analysis". The Astrophysical Journal 924 (2): 117. doi:10.3847/1538-4357/ac3335. Bibcode: 2022ApJ...924..117B. 
  10. ↑ Abt, Helmut A.; Levato, Hugo; Grosso, Monica (2002). "Rotational Velocities of B Stars". The Astrophysical Journal 573 (1): 359–365. doi:10.1086/340590. Bibcode: 2002ApJ...573..359A. 
  11. ↑ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (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. Bibcode: 2001AJ....122.3466M.  Vizier catalog entry
  12. ↑ 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. doi:10.1111/j.1365-2966.2008.13596.x. Bibcode: 2008MNRAS.389..869E. 



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