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词条 WR 86
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  1. References

{{Starbox begin
| name = WR 86
}}{{Starbox observe
| epoch = J2000.0
| equinox = J2000.0
| constell = Scorpius
| ra = {{RA|17|18|23.06137}}[1]
| dec = {{DEC|−34|24|30.6308}}[1]
| appmag_v = 9.27[3]
}}{{Starbox character
| type = Wolf-Rayet star
| class = WC7 + B0III[4]
| appmag_3_passband = J
| appmag_3 = 7.436[5]
| appmag_4_passband = K
| appmag_4 = 6.666[6]
| b-v = +0.63[7]
| u-b = −0.07[7]
| variable = β Cep[3]
}}{{Starbox astrometry
| radial_v =
| prop_mo_ra = −0.92[1]
| prop_mo_dec = −4.80[1]
| parallax = 1.84
| p_error = 1.62
| parallax_footnote = [1]
| dist_ly =
| dist_pc = 2,100 ± 800[4]
| absmag_v = −4.3 + −4.3[4]
}}{{Starbox detail
| source =
| component1 = WR
| mass =
| luminosity = 200,000[4][16]
| temperature = 56,000[16]
| radius = 10[16]
| gravity =
| metal_fe =
| rotational_velocity =
| component2 = B
| mass2 = 19
| luminosity2 = 63,000[4]
| temperature2 = 31,405[4]
| radius2 =
| gravity2 =
| metal_fe2 =
| rotational_velocity2 =
| age_myr2 = 4.0[4]
}}{{Starbox catalog
| names= V1035 Scorpii, CD−34°11622, HD 156327, HIP 84655, 2MASS J17182306-3424306, WDS J17184-3425
}}{{Starbox reference
| Simbad = WR+86
}}{{Starbox end}}

WR 86 is a visual binary in the constellation Scorpius consisting of a Wolf-Rayet star and a β Cephei variable. It lies 2° west of NGC 6357 on the edge of the Great Rift in the Milky Way in the tail of the Scorpion.

WR 86 is a binary with two components of equal visual brightness 0.3" apart. One has the emission-line spectrum of a WC7 Wolf-Rayet star, while the other is a B0 giant. The blue giant varies slightly in brightness every 3.5 hours. The WR star may also be slightly variable.[4]

The pulsations of the B-type giant are characteristic of a β Cephei variable. Analysis of its pulsations and comparison to the expected properties of a WC7 star suggest that both stars could have evolved without mass exchange. The WR and B stars would have had initial masses of {{solar mass|40}} and {{solar mass|20}} respectively four million years ago.[4]

References

1. ^{{cite journal|bibcode=2003yCat.2246....0C|title=VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)|journal=VizieR On-line Data Catalog: II/246. Originally published in: 2003yCat.2246....0C|volume=2246|author1=Cutri|first1=R. M.|last2=Skrutskie|first2=M. F.|last3=Van Dyk|first3=S.|last4=Beichman|first4=C. A.|last5=Carpenter|first5=J. M.|last6=Chester|first6=T.|last7=Cambresy|first7=L.|last8=Evans|first8=T.|last9=Fowler|first9=J.|last10=Gizis|first10=J.|last11=Howard|first11=E.|last12=Huchra|first12=J.|last13=Jarrett|first13=T.|last14=Kopan|first14=E. L.|last15=Kirkpatrick|first15=J. D.|last16=Light|first16=R. M.|last17=Marsh|first17=K. A.|last18=McCallon|first18=H.|last19=Schneider|first19=S.|last20=Stiening|first20=R.|last21=Sykes|first21=M.|last22=Weinberg|first22=M.|last23=Wheaton|first23=W. A.|last24=Wheelock|first24=S.|last25=Zacarias|first25=N.|year=2003}}
2. ^{{cite journal|bibcode=2006A&A...458..453V|arxiv=astro-ph/0609008|title=New Galactic Wolf-Rayet stars, and candidates. An annex to the VIIth Catalogue of Galactic Wolf-Rayet Stars|journal=Astronomy and Astrophysics|volume=458|issue=2|pages=453|author1=Van Der Hucht|first1=K. A.|year=2006|doi=10.1051/0004-6361:20065819}}
3. ^{{cite journal|bibcode=2007A&A...474..653V|title=Validation of the new Hipparcos reduction|journal=Astronomy and Astrophysics|volume=474|issue=2|pages=653|author1=Van Leeuwen|first1=F.|year=2007|doi=10.1051/0004-6361:20078357|arxiv = 0708.1752 }}
4. ^{{cite journal|bibcode= 2002yCat.2237....0D |title= VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system |journal= CDS/ADC Collection of Electronic Catalogues |volume= 2237 |author1= Ducati |first1= J. R. |year= 2002 }}
5. ^{{cite journal|bibcode=2002A&A...384.1012P|title=On the variability of the visual binary WR86. WC7 with a β-Cephei companion|journal=Astronomy and Astrophysics|volume=384|issue=3|pages=1012|author1=Paardekooper|first1=S. J.|last2=Veen|first2=P. M.|last3=Van Genderen|first3=A. M.|last4=Van Der Hucht|first4=K. A.|year=2002|doi=10.1051/0004-6361:20020085}}
6. ^{{cite journal|bibcode=2009yCat....102025S|title=VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)|journal=VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S|volume=1|display-authors=etal|author1=Samus|first1=N. N.|last2=Durlevich|first2=O. V.|year=2009}}
7. ^{{cite journal|bibcode=2012A&A...540A.144S|arxiv=1201.6354|title=The Galactic WC stars. Stellar parameters from spectral analyses indicate a new evolutionary sequence|journal=Astronomy & Astrophysics|volume=540|pages=A144|author1=Sander|first1=A.|last2=Hamann|first2=W.-R.|last3=Todt|first3=H.|year=2012|doi=10.1051/0004-6361/201117830}}
[1][2][3][4][5][6][7]
}}{{Stars of Scorpius}}

10 : Scorpius (constellation)|Wolf–Rayet stars|2MASS objects|Durchmusterung objects|Henry Draper Catalogue objects|Double stars|B-type giants|Beta Cephei variables|Objects with variable star designations|Hipparcos objects

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