It bore the traditional Arabic name السهيل الوزن suhayl al-wazn (Al Suhail al Wazn), but as a modern navigation star this was shortened to Suhail. 'Suhail' (a common Arabic male first name) was traditionally used for at least three other stars: Canopus; Gamma Velorum (al Suhail al Muhlif); and Zeta Puppis (Suhail Hadar). In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN)[11] to catalogue and standardize proper names for stars. The WGSN approved the name Suhail for this star on 21 August 2016 and it is now so entered in the IAU Catalog of Star Names (Canopus had its name approved as is, and Zeta Puppis was given the name Naos).[10]
In Chinese astronomy, Suhail is called 天記 (Pinyin: Tiānjì), meaning Judge for Estimating the Age of Animals, because this star is marking itself and stands alone in the Judge for Estimating the Age of Animalsasterism. Ghost mansion (see: Chinese constellation),[12] 天記 (Tiānjì), was westernized into Tseen Ke, but the name Tseen Ke was designated for Psi Velorum by R. H. Allen works and the meaning is "Heaven's Record".[13]
λ Velorum is an evolved star that has exhausted the hydrogen in its core region. It has about seven times the mass of the Sun. It is likely to be on or approaching the asymptotic giant branch (AGB), although its properties do not exclude it being a slightly more massive star on the red giant branch (RGB).[16] As an AGB star it has an inert core of carbon and oxygen and is alternately fusing helium and hydrogen in two shells outside the core. The star's outer envelope has expanded to form a deep, convective, hydrogen-burning layer that is generating a magnetic field. The surface strength of this field has been measured at 1.72 ± 0.33 G.[17] Massive stars use their hydrogen "fuel" much faster than do smaller stars and Lambda Velorum is estimated to be only some 32 million years old.[9]
λ Velorum is near the upper end of the mass range for intermediate stars, which end their lives by producing a planetary nebula and a white dwarf remnant. It may be massive enough to produce an electron-capturesupernova.[18]
ReferencesEdit
^ abcdefvan 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
^ abcdJohnson, 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
^ abcRuban, E. V.; et al. (September 2006), "Spectrophotometric observations of variable stars", Astronomy Letters, 32 (9): 604–607, Bibcode:2006AstL...32..604R, doi:10.1134/S1063773706090052, S2CID 121747360. See the J/PAZh/32/672 VizieR catalogue entry.
^Keenan, Philip C.; McNeil, Raymond C. (1989). "The Perkins catalog of revised MK types for the cooler stars". Astrophysical Journal Supplement Series. 71: 245. Bibcode:1989ApJS...71..245K. doi:10.1086/191373.
^Wilson, R. E. (1953). "General Catalogue of Stellar Radial Velocities". Carnegie Institute Washington D.C. Publication. Carnegie Institute of Washington D.C.Bibcode:1953GCRV..C......0W.
^ abSetiawan, J.; Pasquini, L.; Da Silva, L.; Hatzes, A. P.; von Der Lühe, O.; Girardi, L.; De Medeiros, J. R.; Guenther, E. (2004). "Precise radial velocity measurements of G and K giants. Multiple systems and variability trend along the Red Giant Branch". Astronomy and Astrophysics. 421: 241. Bibcode:2004A&A...421..241S. doi:10.1051/0004-6361:20041042-1.
^ abcdeCarpenter, Kenneth G.; Robinson, Richard D.; Harper, Graham M.; Bennett, Philip D.; Brown, Alexander; Mullan, Dermott J. (1999). "GHRS Observations of Cool, Low-Gravity Stars. V. The Outer Atmosphere and Wind of the Nearby K Supergiant λ Velorum". The Astrophysical Journal. 521 (1): 382–406. Bibcode:1999ApJ...521..382C. doi:10.1086/307520. S2CID 121891971.
^Luck, R. Earle (2014). "Parameters and Abundances in Luminous Stars". The Astronomical Journal. 147 (6): 137. Bibcode:2014AJ....147..137L. doi:10.1088/0004-6256/147/6/137.
^ abTetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (January 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, S2CID 118629873
^ ab"IAU Catalog of Star Names". Retrieved 28 July 2016.
^Carpenter, Kenneth G. (1998). "The Structure of the Outer Atmosphere and Wind of lambda Vel". Asymptotic Giant Branch Stars. 191: P206. Bibcode:1998IAUS..191P.206C.
^Grunhut, J. H.; et al. (November 2010), "Systematic detection of magnetic fields in massive, late-type supergiants", Monthly Notices of the Royal Astronomical Society, 408 (4): 2290–2297, arXiv:1006.5891, Bibcode:2010MNRAS.408.2290G, doi:10.1111/j.1365-2966.2010.17275.x, S2CID 118564860
^Nomoto, K. (1984). "Evolution of 8-10 solar mass stars toward electron capture supernovae. I - Formation of electron-degenerate O + NE + MG cores". Astrophysical Journal. 277: 791. Bibcode:1984ApJ...277..791N. doi:10.1086/161749.
October 20, 2023
lambda, velorum, suhail, redirects, here, other, uses, suhail, disambiguation, velorum, abbreviated, lambda, officially, named, suhail, star, southern, constellation, vela, with, mean, apparent, visual, magnitude, this, third, brightest, star, constellation, b. Suhail redirects here For other uses see Suhail disambiguation Lambda Velorum l Velorum abbreviated Lambda Vel l Vel officially named Suhail ˈ s uː h eɪ l 10 is a star in the southern constellation of Vela With a mean apparent visual magnitude of 2 21 2 this is the third brightest star in the constellation and one of the brighter stars in the sky The distance to this star can be measured directly using the parallax technique yielding an estimated 545 light years 167 parsecs from the Sun 1 l Velorum Suhail Location of l Velorum circled Observation dataEpoch J2000 0 Equinox J2000 0Constellation VelaRight ascension 09h 07m 59 75787s 1 Declination 43 25 57 3273 1 Apparent magnitude V 2 21 2 2 14 2 30 3 CharacteristicsSpectral type K4 Ib 4 U B color index 1 80 2 B V color index 1 65 2 Variable type LC 3 AstrometryRadial velocity Rv 18 4 5 km sProper motion m RA 24 01 1 mas yr Dec 13 52 1 mas yrParallax p 5 99 0 11 mas 1 Distance545 10 ly 167 3 pc Absolute magnitude MV 3 99 6 DetailsMass7 1 7 M Radius210 7 R Luminosity7 900 7 L Surface gravity log g 0 6 7 cgsTemperature3 800 4 000 7 KMetallicity Fe H 0 06 8 dexRotational velocity v sin i 6 7 6 km sAge31 6 1 7 9 MyrOther designationsAlsuhail Al Suhail al Wazn Suhail Al Sukhal CD 42 4990 FK5 345 HD 78647 HIP 44816 HR 3634 SAO 220878Database referencesSIMBADdataNomenclature Editl Velorum Latinised to Lambda Velorum is the star s Bayer designation It bore the traditional Arabic name السهيل الوزن suhayl al wazn Al Suhail al Wazn but as a modern navigation star this was shortened to Suhail Suhail a common Arabic male first name was traditionally used for at least three other stars Canopus Gamma Velorum al Suhail al Muhlif and Zeta Puppis Suhail Hadar In 2016 the International Astronomical Union organized a Working Group on Star Names WGSN 11 to catalogue and standardize proper names for stars The WGSN approved the name Suhail for this star on 21 August 2016 and it is now so entered in the IAU Catalog of Star Names Canopus had its name approved as is and Zeta Puppis was given the name Naos 10 In Chinese astronomy Suhail is called 天記 Pinyin Tianji meaning Judge for Estimating the Age of Animals because this star is marking itself and stands alone in the Judge for Estimating the Age of Animals asterism Ghost mansion see Chinese constellation 12 天記 Tianji was westernized into Tseen Ke but the name Tseen Ke was designated for Psi Velorum by R H Allen works and the meaning is Heaven s Record 13 Properties Edit nbsp A light curve for Lambda Velorum plotted from Hipparcos data 14 The outer envelope of l Velorum has an effective temperature of about 4 000 K giving it the cool orange hue of a K type star 15 It is an Lc type slow irregular variable star with its brightness varying between apparent magnitudes 2 14 to 2 30 3 l Velorum is an evolved star that has exhausted the hydrogen in its core region It has about seven times the mass of the Sun It is likely to be on or approaching the asymptotic giant branch AGB although its properties do not exclude it being a slightly more massive star on the red giant branch RGB 16 As an AGB star it has an inert core of carbon and oxygen and is alternately fusing helium and hydrogen in two shells outside the core The star s outer envelope has expanded to form a deep convective hydrogen burning layer that is generating a magnetic field The surface strength of this field has been measured at 1 72 0 33 G 17 Massive stars use their hydrogen fuel much faster than do smaller stars and Lambda Velorum is estimated to be only some 32 million years old 9 l Velorum is near the upper end of the mass range for intermediate stars which end their lives by producing a planetary nebula and a white dwarf remnant It may be massive enough to produce an electron capture supernova 18 References Edit a b c d e f 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 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 a b c Ruban E V et al September 2006 Spectrophotometric observations of variable stars Astronomy Letters 32 9 604 607 Bibcode 2006AstL 32 604R doi 10 1134 S1063773706090052 S2CID 121747360 See the J PAZh 32 672 VizieR catalogue entry Keenan Philip C McNeil Raymond C 1989 The Perkins catalog of revised MK types for the cooler stars Astrophysical Journal Supplement Series 71 245 Bibcode 1989ApJS 71 245K doi 10 1086 191373 Wilson R E 1953 General Catalogue of Stellar Radial Velocities Carnegie Institute Washington D C Publication Carnegie Institute of Washington D C Bibcode 1953GCRV C 0W a b Setiawan J Pasquini L Da Silva L Hatzes A P von Der Luhe O Girardi L De Medeiros J R Guenther E 2004 Precise radial velocity measurements of G and K giants Multiple systems and variability trend along the Red Giant Branch Astronomy and Astrophysics 421 241 Bibcode 2004A amp A 421 241S doi 10 1051 0004 6361 20041042 1 a b c d e Carpenter Kenneth G Robinson Richard D Harper Graham M Bennett Philip D Brown Alexander Mullan Dermott J 1999 GHRS Observations of Cool Low Gravity Stars V The Outer Atmosphere and Wind of the Nearby K Supergiant l Velorum The Astrophysical Journal 521 1 382 406 Bibcode 1999ApJ 521 382C doi 10 1086 307520 S2CID 121891971 Luck R Earle 2014 Parameters and Abundances in Luminous Stars The Astronomical Journal 147 6 137 Bibcode 2014AJ 147 137L doi 10 1088 0004 6256 147 6 137 a b Tetzlaff N Neuhauser R Hohle M M January 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 S2CID 118629873 a b IAU Catalog of Star Names Retrieved 28 July 2016 IAU Working Group on Star Names WGSN International Astronomical Union retrieved 22 May 2016 in Chinese AEEA Activities of Exhibition and Education in Astronomy 天文教育資訊網 2006 年 6 月 29 日 Allen Richard Hinckley Star Names Their Lore and Meaning Argo Navis Hipparcos Tools Interactive Data Access Hipparcos ESA Retrieved 8 December 2021 The Colour of Stars Australia Telescope Outreach and Education Commonwealth Scientific and Industrial Research Organisation December 21 2004 archived from the original on February 22 2012 retrieved 2012 01 16 Carpenter Kenneth G 1998 The Structure of the Outer Atmosphere and Wind of lambda Vel Asymptotic Giant Branch Stars 191 P206 Bibcode 1998IAUS 191P 206C Grunhut J H et al November 2010 Systematic detection of magnetic fields in massive late type supergiants Monthly Notices of the Royal Astronomical Society 408 4 2290 2297 arXiv 1006 5891 Bibcode 2010MNRAS 408 2290G doi 10 1111 j 1365 2966 2010 17275 x S2CID 118564860 Nomoto K 1984 Evolution of 8 10 solar mass stars toward electron capture supernovae I Formation of electron degenerate O NE MG cores Astrophysical Journal 277 791 Bibcode 1984ApJ 277 791N doi 10 1086 161749 Retrieved from https en wikipedia org w index php title Lambda Velorum amp oldid 1170122416, wikipedia, wiki, book, books, library,
