| 词条 | WR 9 |
| 释义 |
| name = WR 9 }}{{Starbox observe | epoch = J2000.0 | equinox = J2000.0 | constell = Puppis | ra = {{RA|07|45|50.39754}}[1] | dec = {{DEC|−34|19|48.5067}}[1] | appmag_v = 10.50[3] }}{{Starbox character | class = WC4 + O7[4] | appmag_3_passband = J | appmag_3 = 8.452[5] | appmag_4_passband = K | appmag_4 = 7.545[5] | b-v = +0.93[3] | u-b = +0.04[3] | variable = Eclipsing + WR[9] }}{{Starbox astrometry | radial_v = 321 ± 12[10] | prop_mo_ra = −4.43[1] | prop_mo_dec = +2.76[1] | parallax = 0.94 | p_error = 1.48 | parallax_footnote = [1] | dist_ly = | dist_pc = 1,470[14] | absmag_v = WR: −3.34 O: −4.01[14] }}{{Starbox orbit | reference = [10] | period_unitless = 14.305 | inclination = 55 ± 34 | eccentricity = 0 | axis = | axis_unitless = {{solar radius|123}}[17] | k1 = 186 ± 19 | k2 = 56 ± 28 }}{{Starbox detail | source = | component1 = WR | mass = 9[18] | luminosity = 500,000[19] | temperature = 139,700[19] | radius = 5[17] | gravity = | metal_fe = | rotational_velocity = | component2 = O | mass2 = 32[18] | luminosity2 = | temperature2 = | radius2 = | gravity2 = | metal_fe2 = | rotational_velocity2 = | age_myr2 = }}{{Starbox catalog | names= V443 Puppis, CD−34° 3879, HD 63099, HIP 37876 }}{{Starbox reference | Simbad = WR+9 }}{{Starbox end}} WR 9 is a spectroscopic binary in the constellation Cygnus consisting of a Wolf-Rayet star and a class O star. It is around 4,800 light years away. WR 9 is a binary with two components in a circular 14 day orbit. The Wolf-Rayet component is often identified as the primary because it dominates the spectrum with its broad emission lines, although it is less massive, less luminous, and less visually bright than its companion. The companion is an approximately O7 star. The spectrum is dominated by broad emission lines, those of CIV being the strongest, followed by HeII. CIII lines are seen but much weaker. OV lines are also stronger than CIII. The classification is usually given as WC4, although it has previously been assigned as WC5. By comparison the absorption lines of the secondary star are narrower and weaker, although at blue and shorter wavelengths they become stronger than the WR lines. The spectral type of the secondary can be set at O7.[4] The luminosity class cannot be determined clearly, although it has been suggested to be a supergiant. The Wolf-Rayet star shows no hydrogen in its spectrum and is though to be hydrogen-free. It is calculated to consist of 42% helium and 58% heavier elements, mostly carbon and oxygen.[19] WR 9 is listed as an eclipsing binary in the General Catalogue of Variable Stars, as well as having the more irregular brightness changes frequently seen in Wolf Rayet stars. The total amplitude is only 0.04 magnitudes.[9] The eclipses are so shallow because only the atmosphere of the WR star eclipses the O star on each orbit.[17] References1. ^1 2 {{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}} [1][2][3][4][5][6][7][8][9][10]2. ^1 2 {{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}} 3. ^1 2 3 4 5 {{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. ^1 2 3 {{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. ^1 2 {{cite journal|bibcode=2001MNRAS.324...18B|title=Magellanic Cloud WC/WO Wolf-Rayet stars - I. Binary frequency and Roche lobe overflow formation|journal=Monthly Notices of the Royal Astronomical Society|volume=324|pages=18|author1=Bartzakos|first1=P.|last2=Moffat|first2=A. F. J.|last3=Niemela|first3=V. S.|year=2001|doi=10.1046/j.1365-8711.2001.04126.x}} 6. ^1 2 {{cite journal|bibcode=2001MNRAS.324...33B|title=Magellanic Cloud WC/WO Wolf-Rayet stars - II. Colliding winds in binaries|journal=Monthly Notices of the Royal Astronomical Society|volume=324|pages=33|author1=Bartzakos|first1=P.|last2=Moffat|first2=A. F. J.|last3=Niemela|first3=V. S.|year=2001|doi=10.1046/j.1365-8711.2001.04127.x}} 7. ^1 2 {{cite journal|bibcode=2001NewAR..45..135V|title=The VIIth catalogue of galactic Wolf-Rayet stars|journal=New Astronomy Reviews|volume=45|issue=3|pages=135|author1=Van Der Hucht|first1=Karel A.|year=2001|doi=10.1016/S1387-6473(00)00112-3}} 8. ^1 2 {{cite journal|bibcode=2005A&A...435.1013P|arxiv=astro-ph/0504242|title=Constraining the mass transfer in massive binaries through progenitor evolution models of Wolf-Rayet+O binaries|journal=Astronomy and Astrophysics|volume=435|issue=3|pages=1013|author1=Petrovic|first1=J.|last2=Langer|first2=N.|last3=Van Der Hucht|first3=K. A.|year=2005|doi=10.1051/0004-6361:20042368}} 9. ^1 2 3 {{cite journal|bibcode=1996AJ....112.2227L|title=Photometric Determination of Orbital Inclinations and Mass Loss Rates for Wolf-Rayet Stars in WR+O Binaries|journal=Astronomical Journal |volume=112|pages=2227|author1=Lamontagne|first1=Robert|last2=Moffat|first2=Anthony F. J.|last3=Drissen|first3=Laurent|last4=Robert|first4=Carmelle|last5=Matthews|first5=Jaymie M.|year=1996|doi=10.1086/118175}} 10. ^1 2 3 {{cite journal|bibcode=2000A&A...360..227N|title=Mass-loss rates of Wolf-Rayet stars as a function of stellar parameters|journal=Astronomy and Astrophysics|volume=360|pages=227|author1=Nugis|first1=T.|last2=Lamers|first2=H. J. G. L. M.|year=2000}} }}{{Stars of Puppis}} 8 : Puppis|Wolf–Rayet stars|Durchmusterung objects|Henry Draper Catalogue objects|Spectroscopic binaries|Objects with variable star designations|Hipparcos objects|O-type stars |
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