Astronomy:Zeta Arietis

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Short description: Star in the constellation Aries
ζ Arietis
Location of ζ Arietis (circled)
Observation data
Equinox J2000.0]] (ICRS)
Constellation Aries[1]
Right ascension  03h 14m 54.098s[2]
Declination +21° 02′ 40.01″[2]
Apparent magnitude (V) +4.874±0.023[3]
Characteristics
Spectral type A1 V[4]
U−B color index −0.01[5]
B−V color index −0.02[5]
Astrometry
Radial velocity (Rv)+7.3±2.8[6] km/s
Proper motion (μ) RA: −26.276[2] mas/yr
Dec.: −72.900[2] mas/yr
Parallax (π)12.7708 ± 0.3734[2] mas
Distance255 ± 7 ly
(78 ± 2 pc)
Absolute magnitude (MV)+0.35[1]
Details
Mass2.430±0.340[3] M☉
Radius2.974±0.115[3] R☉
Luminosity65.7±4.8[3] L☉
Surface gravity (log g)3.88±0.07[3] cgs
Temperature9,528±117[3] K
Rotational velocity (v sin i)133[7] km/s
Age333[8] Myr
Other designations
ζ Ari, 58 Arietis, BD+20 527, FK5 1089, GC 3872, HD 20150, HIP 15110, HR 972, SAO 75810, PPM 92319[9]
Database references
SIMBADdata

Zeta Arietis is a star in the northern constellation of Aries. Its name is a Bayer designation that is Latinized from ζ Arietis, and abbreviated Zeta Ari or ζ Ari. This star is dimly visible to the naked eye with an apparent visual magnitude of +4.87.[3] Based upon an annual parallax shift of 12.77 mas,[2] the distance to this star is approximately 255 light-years (78 parsecs). It is receding from the Sun with a radial velocity of +7 km/s.[6]

This is an A-type main sequence star with a stellar classification of A1 V.[4] It is an estimated 333[8] million years old and is spinning rapidly with a projected rotational velocity of 133 km/s.[7] Zeta Arietis has 2.4 times the mass of the Sun and 3.0 times the Sun's radius.[3] It is radiating 66 times the luminosity of the Sun from its photosphere at an effective temperature of 9,528 K,[3] giving it the characteristic white-hued glow of an A-type star.[10]

Name

This star, along with δ Ari, ε Ari, π Ari, and ρ3 Ari, were Al Bīrūnī's Al Buṭain (ألبطين), the dual of Al Baṭn, the Belly.[11] According to the catalogue of stars in the Technical Memorandum 33-507 - A Reduced Star Catalog Containing 537 Named Stars, Al Buṭain was the title for five stars: δ Ari as Botein, π Ari as Al Buṭain I, ρ3 Ari as Al Buṭain II, ε Ari as Al Buṭain III, and ζ Ari as Al Buṭain IV.[12]

In Chinese, 天陰 (Tiān Yīn), meaning Yin Force, refers to an asterism consisting of ζ Arietis, 63 Arietis, δ Arietis, τ Arietis and 65 Arietis.[13] Consequently, the Chinese name for ζ Arietis itself is 天陰二 (Lóu Su èr, English: the Second Star of Yin Force.)[14]

References

  1. ↑ 1.0 1.1 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A.  XHIP record for this object at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 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.
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 Stassun, Keivan G. et al. (September 2019), "The Revised TESS Input Catalog and Candidate Target List" (in en), The Astronomical Journal 158 (4): 138, doi:10.3847/1538-3881/ab3467, ISSN 1538-3881, Bibcode: 2019AJ....158..138S. 
  4. ↑ 4.0 4.1 Cowley, A. et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal 74: 375–406, doi:10.1086/110819, Bibcode: 1969AJ.....74..375C. 
  5. ↑ 5.0 5.1 Johnson, H. L. et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory 4 (99): 99, Bibcode: 1966CoLPL...4...99J. 
  6. ↑ 6.0 6.1 Kharchenko, N. V. et al. (2007), "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ∼55000 stars and mean radial velocities of 516 Galactic open clusters and associations", Astronomische Nachrichten 328 (9): 889, doi:10.1002/asna.200710776, Bibcode: 2007AN....328..889K. 
  7. ↑ 7.0 7.1 Royer, F. et al. (February 2007), "Rotational velocities of A-type stars. III. Velocity distributions", Astronomy and Astrophysics 463 (2): 671–682, doi:10.1051/0004-6361:20065224, Bibcode: 2007A&A...463..671R. 
  8. ↑ 8.0 8.1 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, Bibcode: 2015ApJ...804..146D. 
  9. ↑ "zet Ari". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=zet+Ari. 
  10. ↑ "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 
  11. ↑ Star Names: Their Lore and Meaning (Reprint ed.), New York, NY: Dover Publications Inc, 1963, p. 83, ISBN ((0-486-21079-0)), https://archive.org/details/starnamestheirlo00alle/page/83, retrieved 2010-12-12. 
  12. ↑ Rhoads, Jack W. (November 15, 1971), Technical Memorandum 33-507-A Reduced Star Catalog Containing 537 Named Stars, Jet Propulsion Laboratory, California Institute of Technology, https://ntrs.nasa.gov/citations/19720005197, retrieved 2025-05-04. 
  13. ↑ Script error: The function "in_lang" does not exist. 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, ISBN 978-986-7332-25-7.
  14. ↑ Script error: The function "in_lang" does not exist. AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 22 日



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