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Alpha Leporis

January 01, 1970

Alpha Leporis (α Leporis, abbreviated Alpha Lep, α Lep), formally named Arneb /ˈɑːrnɛb/,[12][13] is the brightest star in the constellation of Lepus.

α Leporis
Location of α Leporis (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Lepus
Right ascension 05h 32m 43.81612s[1]
Declination −17° 49′ 20.2414″[1]
Apparent magnitude (V) 2.589[2]
Characteristics
Spectral type F0 Ib[3]
U−B color index +0.386[2]
B−V color index +0.2[4]
Astrometry
Radial velocity (Rv)+23.9[5] km/s
Proper motion (μ) RA: +3.56[1] mas/yr
Dec.: +1.18[1] mas/yr
Parallax (π)1.47 ± 0.14 mas[1]
Distance2,200 ± 200 ly
(680 ± 60 pc)[1]
Absolute magnitude (MV)-5.7[6]
Details
Mass12.2±0.1[7]–13.9±0.8[8] M☉
Radius129[9] R☉
Luminosity31,410[10] L☉
Surface gravity (log g)1.25[6] cgs
Temperature6,850–7,500[11] K
Metallicity [Fe/H]+0.01[6] dex
Rotational velocity (v sin i)13–21[4] km/s
Age17.5±1.4[7] Myr
Other designations
Arneb, 11 Leporis, BD−17°1166, FK5 207, HD 36673, HIP 25985, HR 1865, SAO 150547
Database references
SIMBADdata

Nomenclature edit

Alpha Leporis is the star's Bayer designation. The traditional name Arneb comes from the Arabic أرنب ’arnab 'hare'[14] ('Lepus' is Latin for hare). In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN)[15] to catalog and standardize proper names for stars. The WGSN's first bulletin of July 2016[16] included a table of the first two batches of names approved by the WGSN; which included Arneb for this star.

In Chinese, 廁 (Cè), meaning Toilet, refers to an asterism consisting of α Leporis, β Leporis, γ Leporis and δ Leporis.[17] Consequently, the Chinese name for α Leporis itself is 廁一 (Cè yī), "the First Star of Toilet".[18]

Properties edit

This is a massive star with about 12 times the mass of the Sun.[7] The interferometer-measured angular diameter of this star, after correction for limb darkening, is 1.77 ± 0.09 mas.[19] At an estimated distance of 2,218 light-years (680 parsecs),[1] this yields a physical size of about 129 times the radius of the Sun.[9] Alpha Leporis has a stellar classification of F0 Ib,[3] with the Ib luminosity class indicating that it is a lower luminosity yellow supergiant star. Since 1943, the spectrum of this star has served as one of the stable anchor points by which other stars are classified.[20] The effective temperature of the outer envelope is about 6,850–7,500 K, which gives the star a yellow-white hue that is typical of F-type stars.[11] It is an estimated 17.5 million years old.[7]

Alpha Leporis is an older, dying star that may have already passed through a red supergiant phase and is now contracting and heating up in the latter phases of stellar evolution, or perhaps is still expanding into the red supergiant phase. Based upon its estimated mass, it is expected to end its life in a spectacular stellar explosion known as a supernova. However, this is not expected to happen for another million years. [21]

Namesakes edit

USS Arneb (AKA-56) was a ship of the United States Navy.

References edit

  1. ^ a b c d e f g 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 Gutierrez-Moreno, Adelina; et al. (1966), "A System of photometric standards", Publications of the Department of Astronomy University of Chile, 1, Publicaciones Universidad de Chile, Department de Astronomy: 1–17, Bibcode:1966PDAUC...1....1G
  3. ^ a b Gray, R. O.; Napier, M. G.; Winkler, L. I. (April 2001), "The Physical Basis of Luminosity Classification in the Late A-, F-, and Early G-Type Stars. I. Precise Spectral Types for 372 Stars", The Astronomical Journal, 121 (4): 2148–2158, Bibcode:2001AJ....121.2148G, doi:10.1086/319956
  4. ^ a b Ayres, Thomas R. (February 20, 2018). "Cracking the Conundrum of F-Supergiant Coronae". The Astrophysical Journal. 854 (2): 95. arXiv:1802.02552. Bibcode:2018ApJ...854...95A. doi:10.3847/1538-4357/aaa6d7. ISSN 0004-637X.
  5. ^ Evans, D. S. (June 20–24, 1966), "The Revision of the General Catalogue of Radial Velocities", in Batten, Alan Henry; Heard, John Frederick (eds.), Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30, vol. 30, University of Toronto: International Astronomical Union, p. 57, Bibcode:1967IAUS...30...57E
  6. ^ a b c Giridhar, S.; Goswami, A.; Kunder, A.; Muneer, S.; Selvakumar, G. (August 1, 2013). "Identification of metal-poor stars using the artificial neural network". Astronomy and Astrophysics. 556: A121. arXiv:1307.6308. Bibcode:2013A&A...556A.121G. doi:10.1051/0004-6361/201219918. ISSN 0004-6361. Alpha Leporis' database entru at VizieR.
  7. ^ a b c d Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (January 1, 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. ISSN 0035-8711. Alpha Leporis' database entry at VizieR.
  8. ^ Lyubimkov, Leonid S.; et al. (February 2010). "Accurate fundamental parameters for A-, F- and G-type Supergiants in the solar neighbourhood". Monthly Notices of the Royal Astronomical Society. 402 (2): 1369–1379. arXiv:0911.1335. Bibcode:2010MNRAS.402.1369L. doi:10.1111/j.1365-2966.2009.15979.x. S2CID 119096173.
  9. ^ a b Lang, Kenneth R. (2006), Astrophysical formulae, Astronomy and astrophysics library, vol. 1 (3rd ed.), Birkhäuser, ISBN 3-540-29692-1. The radius (R*) is given by:
     
  10. ^ McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (November 1, 2012). "Fundamental parameters and infrared excesses of Hipparcos stars". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–357. arXiv:1208.2037. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x. ISSN 0035-8711. Alpha Leporis' database entry at VizieR.
  11. ^ a b Soubiran, Caroline; Le Campion, Jean-François; Brouillet, Nathalie; Chemin, Laurent (June 1, 2016). "The PASTEL catalogue: 2016 version". Astronomy and Astrophysics. 591: A118. arXiv:1605.07384. Bibcode:2016A&A...591A.118S. doi:10.1051/0004-6361/201628497. ISSN 0004-6361. here Alpha Leporis' database entry at VizieR.
  12. ^ Kunitzsch, Paul; Smart, Tim (2006). A Dictionary of Modern star Names: A Short Guide to 254 Star Names and Their Derivations (2nd rev. ed.). Cambridge, Massachusetts: Sky Pub. ISBN 978-1-931559-44-7.
  13. ^ "IAU Catalog of Star Names". Retrieved July 28, 2016.
  14. ^ Allen, Richard Hinckley (1899), Star-names and Their Meanings, G. E. Stechert, p. 268
  15. ^ "IAU Working Group on Star Names (WGSN)". Retrieved May 22, 2016.
  16. ^ "Bulletin of the IAU Working Group on Star Names, No. 1" (PDF). Retrieved July 28, 2016.
  17. ^ (in Chinese) 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.
  18. ^ (in Chinese) 香港太空館 - 研究資源 - 亮星中英對照表 2008-10-25 at the Wayback Machine, Hong Kong Space Museum. Accessed on line November 23, 2010.
  19. ^ Richichi, A.; Percheron, I.; Khristoforova, M. (February 2005), "CHARM2: An updated Catalog of High Angular Resolution Measurements", Astronomy and Astrophysics, 431 (2): 773–777, Bibcode:2005A&A...431..773R, doi:10.1051/0004-6361:20042039
  20. ^ Garrison, R. F. (December 1993), , Bulletin of the American Astronomical Society, 25: 1319, Bibcode:1993AAS...183.1710G, archived from the original on June 25, 2019, retrieved February 4, 2012
  21. ^ Kaler, James B., "ARNEB (Alpha Leporis)", Stars, University of Illinois, retrieved January 8, 2012

January 01, 1970
alpha, leporis, leporis, abbreviated, alpha, formally, named, arneb, ɑːr, brightest, star, constellation, lepus, leporislocation, leporis, circled, observation, dataepoch, j2000, equinox, j2000, constellation, lepus, right, ascension, 81612s, declination, 2414. Alpha Leporis a Leporis abbreviated Alpha Lep a Lep formally named Arneb ˈ ɑːr n ɛ b 12 13 is the brightest star in the constellation of Lepus a LeporisLocation of a Leporis circled Observation dataEpoch J2000 Equinox J2000 Constellation Lepus Right ascension 05h 32m 43 81612s 1 Declination 17 49 20 2414 1 Apparent magnitude V 2 589 2 Characteristics Spectral type F0 Ib 3 U B color index 0 386 2 B V color index 0 2 4 AstrometryRadial velocity Rv 23 9 5 km sProper motion m RA 3 56 1 mas yr Dec 1 18 1 mas yrParallax p 1 47 0 14 mas 1 Distance2 200 200 ly 680 60 pc 1 Absolute magnitude MV 5 7 6 DetailsMass12 2 0 1 7 13 9 0 8 8 M Radius129 9 R Luminosity31 410 10 L Surface gravity log g 1 25 6 cgsTemperature6 850 7 500 11 KMetallicity Fe H 0 01 6 dexRotational velocity v sin i 13 21 4 km sAge17 5 1 4 7 Myr Other designationsArneb 11 Leporis BD 17 1166 FK5 207 HD 36673 HIP 25985 HR 1865 SAO 150547 Database referencesSIMBADdata Contents 1 Nomenclature 2 Properties 3 Namesakes 4 ReferencesNomenclature editAlpha Leporis is the star s Bayer designation The traditional name Arneb comes from the Arabic أرنب arnab hare 14 Lepus is Latin for hare In 2016 the International Astronomical Union organized a Working Group on Star Names WGSN 15 to catalog and standardize proper names for stars The WGSN s first bulletin of July 2016 16 included a table of the first two batches of names approved by the WGSN which included Arneb for this star In Chinese 廁 Ce meaning Toilet refers to an asterism consisting of a Leporis b Leporis g Leporis and d Leporis 17 Consequently the Chinese name for a Leporis itself is 廁一 Ce yi the First Star of Toilet 18 Properties editThis is a massive star with about 12 times the mass of the Sun 7 The interferometer measured angular diameter of this star after correction for limb darkening is 1 77 0 09 mas 19 At an estimated distance of 2 218 light years 680 parsecs 1 this yields a physical size of about 129 times the radius of the Sun 9 Alpha Leporis has a stellar classification of F0 Ib 3 with the Ib luminosity class indicating that it is a lower luminosity yellow supergiant star Since 1943 the spectrum of this star has served as one of the stable anchor points by which other stars are classified 20 The effective temperature of the outer envelope is about 6 850 7 500 K which gives the star a yellow white hue that is typical of F type stars 11 It is an estimated 17 5 million years old 7 Alpha Leporis is an older dying star that may have already passed through a red supergiant phase and is now contracting and heating up in the latter phases of stellar evolution or perhaps is still expanding into the red supergiant phase Based upon its estimated mass it is expected to end its life in a spectacular stellar explosion known as a supernova However this is not expected to happen for another million years 21 Namesakes editUSS Arneb AKA 56 was a ship of the United States Navy References edit a b c d e f g van Leeuwen F November 2007 Validation of the new Hipparcos reduction Astronomy and Astrophysics 474 2 653 664 arXiv 0708 1752 Bibcode 2007A amp A 474 653V doi 10 1051 0004 6361 20078357 S2CID 18759600 a b Gutierrez Moreno Adelina et al 1966 A System of photometric standards Publications of the Department of Astronomy University of Chile 1 Publicaciones Universidad de Chile Department de Astronomy 1 17 Bibcode 1966PDAUC 1 1G a b Gray R O Napier M G Winkler L I April 2001 The Physical Basis of Luminosity Classification in the Late A F and Early G Type Stars I Precise Spectral Types for 372 Stars The Astronomical Journal 121 4 2148 2158 Bibcode 2001AJ 121 2148G doi 10 1086 319956 a b Ayres Thomas R February 20 2018 Cracking the Conundrum of F Supergiant Coronae The Astrophysical Journal 854 2 95 arXiv 1802 02552 Bibcode 2018ApJ 854 95A doi 10 3847 1538 4357 aaa6d7 ISSN 0004 637X Evans D S June 20 24 1966 The Revision of the General Catalogue of Radial Velocities in Batten Alan Henry Heard John Frederick eds Determination of Radial Velocities and their Applications Proceedings from IAU Symposium no 30 vol 30 University of Toronto International Astronomical Union p 57 Bibcode 1967IAUS 30 57E a b c Giridhar S Goswami A Kunder A Muneer S Selvakumar G August 1 2013 Identification of metal poor stars using the artificial neural network Astronomy and Astrophysics 556 A121 arXiv 1307 6308 Bibcode 2013A amp A 556A 121G doi 10 1051 0004 6361 201219918 ISSN 0004 6361 Alpha Leporis database entru at VizieR a b c d Tetzlaff N Neuhauser R Hohle M M January 1 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 ISSN 0035 8711 Alpha Leporis database entry at VizieR Lyubimkov Leonid S et al February 2010 Accurate fundamental parameters for A F and G type Supergiants in the solar neighbourhood Monthly Notices of the Royal Astronomical Society 402 2 1369 1379 arXiv 0911 1335 Bibcode 2010MNRAS 402 1369L doi 10 1111 j 1365 2966 2009 15979 x S2CID 119096173 a b Lang Kenneth R 2006 Astrophysical formulae Astronomy and astrophysics library vol 1 3rd ed Birkhauser ISBN 3 540 29692 1 The radius R is given by 2 R 10 3 680 1 77 AU 0 0046491 AU R 259 R displaystyle begin aligned 2 cdot R amp frac 10 3 cdot 680 cdot 1 77 text AU 0 0046491 text AU R bigodot amp approx 259 cdot R bigodot end aligned nbsp McDonald I Zijlstra A A Boyer M L November 1 2012 Fundamental parameters and infrared excesses of Hipparcos stars Monthly Notices of the Royal Astronomical Society 427 1 343 357 arXiv 1208 2037 Bibcode 2012MNRAS 427 343M doi 10 1111 j 1365 2966 2012 21873 x ISSN 0035 8711 Alpha Leporis database entry at VizieR a b Soubiran Caroline Le Campion Jean Francois Brouillet Nathalie Chemin Laurent June 1 2016 The PASTEL catalogue 2016 version Astronomy and Astrophysics 591 A118 arXiv 1605 07384 Bibcode 2016A amp A 591A 118S doi 10 1051 0004 6361 201628497 ISSN 0004 6361 here Alpha Leporis database entry at VizieR Kunitzsch Paul Smart Tim 2006 A Dictionary of Modern star Names A Short Guide to 254 Star Names and Their Derivations 2nd rev ed Cambridge Massachusetts Sky Pub ISBN 978 1 931559 44 7 IAU Catalog of Star Names Retrieved July 28 2016 Allen Richard Hinckley 1899 Star names and Their Meanings G E Stechert p 268 IAU Working Group on Star Names WGSN Retrieved May 22 2016 Bulletin of the IAU Working Group on Star Names No 1 PDF Retrieved July 28 2016 in Chinese 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 in Chinese 香港太空館 研究資源 亮星中英對照表 Archived 2008 10 25 at the Wayback Machine Hong Kong Space Museum Accessed on line November 23 2010 Richichi A Percheron I Khristoforova M February 2005 CHARM2 An updated Catalog of High Angular Resolution Measurements Astronomy and Astrophysics 431 2 773 777 Bibcode 2005A amp A 431 773R doi 10 1051 0004 6361 20042039 Garrison R F December 1993 Anchor Points for the MK System of Spectral Classification Bulletin of the American Astronomical Society 25 1319 Bibcode 1993AAS 183 1710G archived from the original on June 25 2019 retrieved February 4 2012 Kaler James B ARNEB Alpha Leporis Stars University of Illinois retrieved January 8 2012 Retrieved from https en wikipedia org w index php title Alpha Leporis amp oldid 1225425587, wikipedia, wiki, book, books, library,

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