(Translated by https://www.hiragana.jp/)
Mu Aurigae - Wikipedia Jump to content

Mu Aurigae

From Wikipedia, the free encyclopedia
Mu Aurigae
Location of μみゅー Aurigae (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Auriga
Right ascension 05h 13m 25.71733s[1]
Declination +38° 29′ 04.1879″[1]
Apparent magnitude (V) +4.88[2]
Characteristics
Spectral type A4 Vm[3][4] (kA3hA8VmA8[5])
U−B color index +0.10[2]
B−V color index +0.18[2]
Astrometry
Radial velocity (Rv)+26.0±1.2[6] km/s
Proper motion (μみゅー) RA: −19.545[7] mas/yr
Dec.: −72.456[7] mas/yr
Parallax (πぱい)20.7218 ± 0.4971 mas[7]
Distance157 ± 4 ly
(48 ± 1 pc)
Absolute magnitude (MV)+1.47[8]
Details
Mass2.09[9] M☉
Radius3.15[7] R☉
Luminosity22.95[7] L☉
Surface gravity (log g)3.4[10] cgs
Temperature7,500[10] K
Metallicity [Fe/H]−0.3[10] dex
Rotational velocity (v sin i)80.0[10] km/s
Age560[9] Myr
Other designations
μみゅー Aur, 11 Aurigae, BD+38°1063, FK5 192, HD 33641, HIP 24340, HR 1689, SAO 57755, WDS J05134+3829AB[11]
Database references
SIMBADdata

Mu Aurigae, Latinized as μみゅー Aurigae, is the Bayer designation for an unconfirmed binary star[12] in the northern constellation of Auriga. It is visible to the naked eye with an apparent visual magnitude of +4.88.[2] Based upon an annual parallax shift of 20.7218±0.4971 mas as seen from Earth,[7] is located 157 light-years from the Sun.

This is an A-type main-sequence star with a stellar classification of A4 Vm;[4] the 'm' suffix indicating that abnormal abundances of heavier elements appear in the star's spectrum, making this an Am star. It is 560[9] million years old with a projected rotational velocity of 80 km/s.[10] It has double[9] the mass of the Sun and is radiating 23[7] times the Sun's luminosity at an effective temperature of 7,500 K.[10]

A very close companion has been reported using speckle interferometry,[12] but this remains unconfirmed. The separation at discovery in 1986 was 0.07 mas and it was measured at 0.066 mas in 1999. It was catalogued by Hipparcos as a problem binary, indicating that the measurements of its position were not consistent with the motion of a single star, but no satisfactory orbit could be found to match the motion[12]

Name

[edit]

This star, along with λらむだ Aur and σしぐま Aur, were Kazwini's Al Ḣibāʽ (ألحباع), the Tent.[13] According to the catalogue of stars in the Technical Memorandum 33-507 - A Reduced Star Catalog Containing 537 Named Stars, Al Ḣibāʽ were the title for three stars: λらむだ Aur as Al Ḣibāʽ I, μみゅー Aur as Al Ḣibāʽ II and σしぐま Aur as Al Ḣibāʽ III.[14]

In Chinese, 天てん潢 (Tiān Guāng), meaning Celestial Pier, refers to an asterism consisting of μみゅー Aurigae, 19 Aurigae, φふぁい Aurigae, 14 Aurigae and σしぐま Aurigae.[15] Consequently, μみゅー Aurigae itself is known as 天てん潢五 (Tiān Guāng wu, English: the First Star of Celestial Pier).[16]

References

[edit]
  1. ^ a b van Leeuwen, F. (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. ^ Royer, F.; et al. (October 2002), "Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i", Astronomy and Astrophysics, 393: 897–911, arXiv:astro-ph/0205255, Bibcode:2002A&A...393..897R, doi:10.1051/0004-6361:20020943, S2CID 14070763.
  4. ^ a b Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
  5. ^ Abt, Helmut A.; Morrell, Nidia I. (1995), "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars", The Astrophysical Journal Supplement Series, 99: 135, Bibcode:1995ApJS...99..135A, doi:10.1086/192182.
  6. ^ de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, S2CID 59451347, A61.
  7. ^ a b c d e f g Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  8. ^ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
  9. ^ a b c d De Rosa, R. J.; et al. (January 2014), "The VAST Survey - III. The multiplicity of A-type stars within 75 pc", Monthly Notices of the Royal Astronomical Society, 437 (2): 1216–1240, arXiv:1311.7141, Bibcode:2014MNRAS.437.1216D, doi:10.1093/mnras/stt1932, S2CID 88503488.
  10. ^ a b c d e f Gebran, M.; Farah, W.; Paletou, F.; Monier, R.; Watson, V. (2016), "A new method for the inversion of atmospheric parameters of A/Am stars", Astronomy and Astrophysics, 589: A83, arXiv:1603.01146, Bibcode:2016A&A...589A..83G, doi:10.1051/0004-6361/201528052, S2CID 118549566.
  11. ^ "mu Aur", SIMBAD, Centre de données astronomiques de Strasbourg, retrieved 2022-02-08.
  12. ^ a b c Mason, Brian D.; Martin, Christian; Hartkopf, William I.; Barry, Donald J.; Germain, Marvin E.; Douglass, Geoffrey G.; Worley, Charles E.; Wycoff, Gary L.; Ten Brummelaar, Theo; Franz, Otto G. (1999), "Speckle Interferometry of New and Problem HIPPARCOS Binaries", The Astronomical Journal, 117 (4): 1890, Bibcode:1999AJ....117.1890M, doi:10.1086/300823.
  13. ^ Allen, R. H. (1963), Star Names: Their Lore and Meaning (Reprint ed.), New York, NY: Dover Publications Inc, p. 91, ISBN 0-486-21079-0, retrieved 2010-12-12.
  14. ^ Rhoads, Jack W. (November 15, 1971), Technical Memorandum 33-507-A Reduced Star Catalog Containing 537 Named Stars (PDF), Jet Propulsion Laboratory, California Institute of Technology.
  15. ^ (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.
  16. ^ (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 13 日にち
[edit]
Retrieved from "https://en.wikipedia.org/w/index.php?title=Mu_Aurigae&oldid=1251910722"