Zeta Arae

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ζぜーた Arae
Location of ζぜーた Arae (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Ara
Right ascension 16h 58m 37.21217s[1]
Declination –55° 59′ 24.5203″[1]
Apparent magnitude (V) 3.13[2]
Characteristics
Spectral type K3 III[3]
U−B color index +1.96[2]
B−V color index +1.60[2]
Astrometry
Radial velocity (Rv)–6.0[4] km/s
Proper motion (μみゅー) RA: –17.80[1] mas/yr
Dec.: –36.67[1] mas/yr
Parallax (πぱい)5.7725 ± 0.1727 mas[5]
Distance570 ± 20 ly
(173 ± 5 pc)
Absolute magnitude (MV)–3.95[6]
Details
Mass7-8[7] M☉
Radius114[7] R☉
Luminosity3,800[7] L☉
Surface gravity (log g)1.20[7] cgs
Temperature4,246[7] K
Metallicity [Fe/H]–0.40[8] dex
Age40~50 Myr
Other designations
Tseen Yin, GJ 9581, SAO 244315, HD 152786, FK5 631, HIP 83081, HR 6285, CPD−55° 7766[9]
Database references
SIMBADdata
ARICNSdata

Zeta Arae (ζぜーた Ara, ζぜーた Arae) is the third-brightest star in the southern constellation Ara.[10] The apparent visual magnitude of this star is 3.1,[2] which can be seen from suburban skies in the southern hemisphere. From the parallax measurements, it is located at a distance of 490 light-years (150 parsecs) from Earth.[1]

The spectrum of this star matches a stellar classification of K3 III.[3] The luminosity class of 'III' indicates this is a giant star that has exhausted the hydrogen at its core and evolved away from the main sequence. It is radiating energy from its outer atmosphere at an effective temperature of 4,246 K which is what gives it the orange hue of a K-type star.[11] This star displays an excess of infrared emission that may indicate circumstellar matter.[12]

In Chinese, 龜かめ (Guī), meaning Tortoise, refers to an asterism consisting of ζぜーた Arae, εいぷしろん1 Arae, γがんま Arae, δでるた Arae and ηいーた Arae.[13] Consequently, the Chinese name for ζぜーた Arae itself is 龜かめ五ご (Guī wǔ, English: the Fifth Star of Tortoise.)[14]

Allen called it Tseen Yin /ˌsiːnˈjɪn/, together with δでるた Arae, from the Chinese 天てん陰かげ (Mandarin pronunciation tiānyīn) "dark sky".[15] However, 天てん陰かげ is in Aries.[16][17] so Allen probably confused constellation "Ara" with "Ari".

References

  1. ^ a b c d e van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600
  2. ^ a b c d 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
  3. ^ a b Houk, Nancy (1978), "Michigan catalogue of two-dimensional spectral types for the HD stars", University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations -90_ to -53_ƒ0, 1, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1975mcts.book.....H
  4. ^ Wielen, R.; et al. (1999), "Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions", Veröff. Astron. Rechen-Inst. Heidelb, 35 (35), Astronomisches Rechen-Institut Heidelberg: 1, Bibcode:1999VeARI..35....1W
  5. ^ Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  6. ^ Jasniewicz, G.; et al. (February 1999), "Late-type giants with infrared excess. I. Lithium abundances", Astronomy and Astrophysics, 342: 831–838, Bibcode:1999A&A...342..831J
  7. ^ a b c d e Cruzalèbes, P.; Jorissen, A.; Rabbia, Y.; Sacuto, S.; Chiavassa, A.; Pasquato, E.; Plez, B.; Eriksson, K.; Spang, A.; Chesneau, O. (2013). "Fundamental parameters of 16 late-type stars derived from their angular diameter measured with VLTI/AMBER". Monthly Notices of the Royal Astronomical Society. 434 (1): 437. arXiv:1306.3288. Bibcode:2013MNRAS.434..437C. doi:10.1093/mnras/stt1037. S2CID 49573767.
  8. ^ Jones, K. L.; et al. (June 1992), "Spectroscopic investigation of cool giants and the authenticity of their reported microwave emission", Monthly Notices of the Royal Astronomical Society, 256 (3): 535–544, Bibcode:1992MNRAS.256..535J, doi:10.1093/mnras/256.3.535
  9. ^ "zet Ara -- Star", SIMBAD, Centre de Données astronomiques de Strasbourg, retrieved 2012-01-05
  10. ^ Kaler, Jim (13 July 2012). "Zeta Arae". Stars. University of Illinois. Retrieved 12 September 2019.
  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. ^ Plets, H.; et al. (July 1997), "Giants with infrared excess", Astronomy and Astrophysics, 323: 513–523, Bibcode:1997A&A...323..513P
  13. ^ (in Chinese) 中國ちゅうごく星座せいざ神話しんわ, written by 陳ひね久金ひさがね. Published by 台灣たいわん書房しょぼう出版しゅっぱん有限ゆうげん公司こうし, 2005, ISBN 978-986-7332-25-7.
  14. ^ (in Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文てんもん教育きょういく資し訊網 2006 年ねん 7 月がつ 1 日にち
  15. ^ Allen, R. H. (1963). Star Names: Their Lore and Meaning (Reprint ed.). New York, NY: Dover Publications Inc. p. 64. ISBN 0-486-21079-0.
  16. ^ Chevalier, S., and Tsuchihashi, P., (1911): "Catalogue d'Étoiles fixes, observés a Pekin sous l'Empereur Kien Long (Qianlong (Chien-Lung)), XVIIIe siecle", Annales de l'Observatoire Astronomique de Zô-Sé.
  17. ^ 伊い世よ同どう (Yi Shi Tong) (1981): 『中西なかにし対照たいしょう恒星こうせい図表ずひょう』科学かがく出版しゅっぱん社しゃ.(in Chinese)

External links

Retrieved from "https://mdwiki.org/wiki/Zeta_Arae"