Xem mã nguồn của HD 5980

{{Starbox begin
| name = HD 5980
}}
{{Starbox image
| image = [[Tập tin:Hd-5980-chadra.jpg|250px]]
| caption = X-ray image by [[Chandra X-ray Observatory|Chandra Observatory]]
| credit =
}}
{{Starbox observe
| epoch = [[Kỷ nguyên (thiên văn học)#Năm Julius và J2000|J2000.0]]
| equinox = [[Kỷ nguyên (thiên văn học)#Năm Julius và J2000|J2000.0]]
| constell = [[Đỗ Quyên (chòm sao)|Đỗ Quyên]]
| ra={{RA|00|59|26.569}}<ref name=tycho>{{chú thích tạp chí|bibcode=1998A&A...335L..65H|title=The TYCHO Reference Catalogue|journal=Astronomy and Astrophysics|volume=335|pages=L65|last1=Hog|first1=E.|last2=Kuzmin|first2=A.|last3=Bastian|first3=U.|last4=Fabricius|first4=C.|last5=Kuimov|first5=K.|last6=Lindegren|first6=L.|last7=Makarov|first7=V. V.|last8=Roeser|first8=S.|year=1998}}</ref>
| dec={{Dec|–72|09|53.91}}<ref name=tycho/>
| appmag_v=11.31<ref name=tycho2>{{chú thích tạp chí|bibcode=2000A&A...355L..27H|title=The Tycho-2 catalogue of the 2.5 million brightest stars|journal=Astronomy and Astrophysics|volume=355|pages=L27|last1=Høg|first1=E.|last2=Fabricius|first2=C.|last3=Makarov|first3=V. V.|last4=Urban|first4=S.|last5=Corbin|first5=T.|last6=Wycoff|first6=G.|last7=Bastian|first7=U.|last8=Schwekendiek|first8=P.|last9=Wicenec|first9=A.|year=2000|doi=10.1888/0333750888/2862|isbn=0333750888}}</ref>
}}
{{Starbox character
| class=LBV + WN4 + OI<ref name=foellmi>{{chú thích tạp chí|bibcode=2008RMxAA..44....3F|title=New insights into the nature of the SMC WR/LBV binary HD 5980|journal=Revista Mexicana de Astronomía y Astrofísica |volume=44|pages=3–27|last1=Foellmi|first1=C.|last2=Koenigsberger|first2=G.|author2-link=Gloria Suzanne Koenigsberger Horowitz|last3=Georgiev|first3=L.|last4=Toledano|first4=O.|last5=Marchenko|first5=S. V.|last6=Massey|first6=P.|last7=Dall|first7=T. H.|last8=Moffat|first8=A. F. J.|last9=Morrell|first9=N.|last10=Corcoran|first10=M.|last11=Kaufer|first11=A.|last12=Nazé|first12=Y.|last13=Pittard|first13=J.|last14=St-Louis|first14=N.|last15=Fullerton|first15=A.|last16=Massa|first16=D.|last17=Pollock|first17=A. M. T.|year=2008|arxiv = 0711.4858 }}</ref>
| b-v = −0.18<ref name=tycho2/>
| u-b = −0.99<ref name=arp>{{chú thích tạp chí|bibcode=1960AJ.....65..404A|doi = 10.1086/108284 |title = Southern hemisphere photometry. VIII. Cepheids in the Small Magellanic Cloud |journal = The Astronomical Journal |volume = 65 |pages = 404 |year = 1960 |last1 = Arp |first1 = H. }}</ref>
| variable = [[Luminous blue variable|LBV]]<ref name=triple/> and [[Algol variable|EA]]<ref name=foellmi/>
}}
{{Starbox astrometry
| radial_v = &minus;20<ref name=koenigsberger/>
| prop_mo_ra = −3.5<ref name=tycho/>
| prop_mo_dec = −2.4<ref name=tycho/>
| parallax =
| p_error =
| parallax_footnote =
| dist_ly = 200,000
| dist_pc = 64,000<ref name=triple/>
| absmag_v= −8.1 {{nowrap|(−7.1/−6.8/−6.7)}}<ref name=shenar>{{chú thích tạp chí|bibcode=2016A&A...591A..22S|title=Wolf-Rayet stars in the Small Magellanic Cloud: II. Analysis of the binaries|volume=1604|pages=A22|arxiv=1604.01022|last1=Shenar|first1=T.|last2=Hainich|first2=R.|last3=Todt|first3=H.|last4=Sander|first4=A.|last5=Hamann|first5=W.-R.|last6=Moffat|first6=A. F. J.|last7=Eldridge|first7=J. J.|last8=Pablo|first8=H.|last9=Oskinova|first9=L. M.|last10=Richardson|first10=N. D.|year=2016|doi=10.1051/0004-6361/201527916|journal=Astronomy & Astrophysics}}</ref>
}}
{{Starbox orbit
| reference = <ref name=koenigsberger/>
| primary = HD 5980 A
| name = HD 5980 B
| period =
| period_unitless = 19.2656±0.0009 days
| axis = <!--Semimajor axis (in arcseconds)-->
| axis_unitless = 151±4 {{solar radius}}
| eccentricity = 0.27±0.02
| inclination = 86
| node =
| periastron = 2451424.97±0.25
| periarg =
| periarg_primary = 134±4
| k1 = 214±6
| k2 = 200±6
}}
{{Starbox orbit
| reference = <ref name=koenigsberger/>
| primary = HD 5980 C
| name =
| period =
| period_unitless = 96.56±0.01 days
| axis =
| axis_unitless =
| eccentricity = 0.815
| inclination =
| node =
| periastron = 2451183.40±0.22
| periarg =
| periarg_primary = 252±3.3<ref name=koenigsberger/>
| k1 = 81±4
| k2 =
}}
{{Starbox detail
| component1=A
| radius = 24<ref name=shenar/> (21<ref name=foellmi/> – 280<ref name=drissen/>)
| mass = 61<ref name=shenar/>
| temperature = 45,000<ref name=shenar/> {{nowrap|(21,000 – 53,000<ref name=foellmi/>)}}
| luminosity = 2,200,000<ref name=shenar/> (2,000,000<ref name=pasemann/> – 10,000,000<ref name=drissen/>)
| rotational_velocity = 250<ref name=gloria>{{chú thích tạp chí|bibcode=2010AJ....139.2600K|title=A ~ 40 Year Variability Cycle in the Luminous Blue Variable/Wolf-Rayet Binary System HD 5980?|journal=The Astronomical Journal|volume=139|issue=6|pages=2600–2611|last1=Koenigsberger|first1=Gloria|last2=Georgiev|first2=Leonid|last3=Hillier|first3=D. John|last4=Morrell|first4=Nidia|last5=Barbá|first5=Rodolfo|last6=Gamen|first6=Roberto|year=2010|doi=10.1088/0004-6256/139/6/2600|doi-access=free}}</ref>
| metal_fe = &minus;1.0<ref name=triple/>
| component2 = B
| radius2 = 22<ref name=shenar/>
| mass2 = 66<ref name=shenar/>
| temperature2 = 45,000<ref name=shenar/>
| luminosity2 = 1,800,000<ref name=shenar/>
| rotational_velocity2 = <400<ref name=shenar/>
| metal_fe2 = &minus;1.0<ref name=triple/>
| age_myr2 = 2.6<ref name=shenar/>
}}
{{Starbox detail|no_heading=y
| component1 = C
| radius = 24<ref name=shenar/>
| mass = 34<ref name=shenar/>
| temperature = 34,000<ref name=shenar/>
| luminosity = 708,000<ref name=shenar/>
| rotational_velocity = 120<ref name=shenar/>
| metal_fe = ≅&nbsp;&minus;0.7<ref name=triple/>
| age_myr = 3.1<ref name=koenigsberger/>
}}
{{Starbox catalog
| names = [[Danh mục Henry Draper|HD]]&nbsp;5980, [[Đài thiên văn Radcliffe|RMC]]&nbsp;14, [[Nicholas Sanduleak|Sk]]&nbsp;78, [[AB (danh mục sao)|AB]]&nbsp;5, SMC&nbsp;WR5, [[Hiệp hội Quan sát Sao biến quang Hoa Kỳ|AAVSO]]&nbsp;0056-72
}}
{{Starbox reference
| Simbad=HD+5980
}}
{{Starbox end}}
'''HD 5980''' là ngôi sao đôi dạng [[sao Wolf-Rayet|Wolf-Rayet]] với khối lượng 51-67/58-79 lần [[Khối lượng Mặt trời]] trong chòm sao [[Đỗ Quyên (chòm sao)|Tucana]].

== Tham khảo ==

{{thể loại Commons}}
{{Tham khảo|refs=<ref name=triple>{{chú thích tạp chí|bibcode=2011AJ....142..191G|title=Wind Structure and Luminosity Variations in the Wolf-Rayet/Luminous Blue Variable HD 5980|journal=The Astronomical Journal|volume=142|issue=6|pages=191|last1=Georgiev|first1=Leonid|last2=Koenigsberger|first2=Gloria|last3=Hillier|first3=D. John|last4=Morrell|first4=Nidia|last5=Barbá|first5=Rodolfo|last6=Gamen|first6=Roberto|year=2011|doi=10.1088/0004-6256/142/6/191|url=http://sedici.unlp.edu.ar/handle/10915/84382|doi-access=free}}</ref>

<ref name=koenigsberger>{{chú thích tạp chí|bibcode=2014AJ....148...62K|title=The HD 5980 Multiple System: Masses and Evolutionary Status|journal=The Astronomical Journal|volume=148|issue=4|pages=62|last1=Koenigsberger|first1=Gloria|last2=Morrell|first2=Nidia|last3=Hillier|first3=D. John|last4=Gamen|first4=Roberto|last5=Schneider|first5=Fabian R. N.|last6=González-Jiménez|first6=Nicolás|last7=Langer|first7=Norbert|last8=Barbá|first8=Rodolfo|year=2014|doi=10.1088/0004-6256/148/4/62|arxiv = 1408.0556 }}</ref>

<ref name=drissen>{{chú thích tạp chí|bibcode=2001ApJ...546..484D|title=Physical Parameters of Erupting Luminous Blue Variables: NGC 2363-V1 Caught in the Act|journal=The Astrophysical Journal|volume=546|pages=484–495|last1=Drissen|first1=Laurent|last2=Crowther|first2=Paul A.|last3=Smith|first3=Linda J.|last4=Robert|first4=Carmelle|author4-link=Carmelle Robert|last5=Roy|first5=Jean-René|last6=Hillier|first6=D. John|year=2001|issue=1|doi=10.1086/318264|arxiv = astro-ph/0008221 }}</ref>

<ref name=pasemann>{{chú thích tạp chí |title=Spectral analyses of the Wolf-Rayet stars in the Small Magellanic Cloud |journal=Société Royale des Sciences de Liège |volume=80 |pages=180–184 |date=2011 |bibcode=2011BSRSL..80..180P |last1=Pasemann |first1=Diana |last2=Rühling |first2=Ute |last3=Hamann |first3=Wolf-Rainer}}</ref>}}{{Sơ khai thiên văn học}}
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{{Chòm sao Đỗ Quyên}}

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