| 词条 | KQ Puppis |
| 释义 |
| name = KQ Puppis }}{{Starbox observe | epoch = J2000 | constell = Puppis | ra = {{RA|07|33|47.96383}}[1] | dec = {{DEC|-14|31|26.0026}}[1] | appmag_v = +4.97[2] {{nowrap|(4.82 - 5.17[4])}} }}{{Starbox character | class = M2Iab + B0Ve[3] | b-v = +1.41[2] | u-b = +0.29[2] | variable = LC[4] }}{{Starbox astrometry | radial_v = +22[5] | prop_mo_ra = -6.98[1] | prop_mo_dec = +4.82[1] | parallax = 2.12 | p_error = 0.45 | parallax_footnote = [1] | dist_pc = 1,400[13] | absmag_v = }}{{Starbox orbit | reference=[6] | period_unitless=9,752 days | eccentricity=0.46 | inclination=60-80 }}{{Starbox detail | component1=Cool primary | mass = 13-20[6] | radius = 570[6] | luminosity = 59,800[6] | temperature = 3,662[7] | gravity = | metal_fe = | rotational_velocity = | component2=Hot secondary | mass2 = 17[6] | radius2 = 4.35[6] | luminosity2 = 13,800[6] | temperature2 = 30,000[6] | gravity2 = | metal_fe2 = | rotational_velocity2 = | age_myr2 = }}{{Starbox catalog |names=KQ Pup, BD−14° 1971, HIP 36773, HR 2902, NGC 2422 9, SAO 153072 |component1=Primary |names1=HD 60414 |component2=Secondary |names2=HD 60415 }}{{Starbox reference | Simbad=KQ+Pup }}{{Starbox end}} KQ Puppis (KQ Pup) is a spectroscopic binary variable star in the constellation Puppis. A red supergiant star and a hot main sequence star orbit each other every 9,742 days. Its apparent magnitude varies between 4.82 and 5.17. The KQ Puppis system consists of a fairly typical M2 supergiant, in orbit with a hotter less luminous star. The hotter star is surrounded by a disc of material being transferred from the cool supergiant. This type of binary is referred to a VV Cephei system, although in this case there are no eclipses of either star.[6] A portion of the disc does appear to be eclipsed and this is detected as a strong drop in far-ultraviolet radiation for about a third of the orbit.[3] The red supergiant primary star has been compared to Betelgeuse.[6] It shows small amplitude irregular pulsations, and also some variation associated with the orbital motion.[8] The nature of the secondary is less certain. The spectrum shows high excitation features that would indicate an early B or hotter spectral type, but these may be associated with the disc rather than that star itself. Other studies have found a spectrum similar to an A supergiant, but this is thought to be an artefact of a B-type shell star.[9] KQ Puppis has been catalogued as an outlying member of the open cluster Messier 47 (NGC 2422) and would be the brightest member of that cluster.[10] Membership is uncertain as it appears to be more distant than the other stars in the cluster.[11] References1. ^1 2 3 4 {{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 }} {{Stars of Puppis}}2. ^1 2 {{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|pages=0|author1=Ducati|first1=J. R.|year=2002}} 3. ^1 {{cite journal|doi=10.1051/0004-6361:20021830|title=First far-UV observations of KQ Puppis with FUSE|journal=Astronomy and Astrophysics|volume=399|issue=2|pages=681|year=2003|last1=González-Riestra|first1=R.|last2=Rossi|first2=C.|last3=Viotti|first3=R. F.|bibcode=2003A&A...399..681G}} 4. ^1 {{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|pages=02025|author1=Samus|first1=N. N.|last2=Durlevich|first2=O. V.|year=2009|display-authors=etal}} 5. ^{{cite journal|bibcode=1953GCRV..C......0W|title=General catalogue of stellar radial velocities|journal=Washington|pages=0|author1=Wilson|first1=Ralph Elmer|year=1953}} 6. ^1 2 3 4 5 6 7 8 9 10 {{cite journal|bibcode=1992A&A...256..133R|title=The spectrum of the VV Cephei star KQ Puppis (Boss 1985). III - A possible model|journal=Astronomy and Astrophysics|volume=256|pages=133|author1=Rossi|first1=C.|last2=Altamore|first2=A.|last3=Baratta|first3=G. B.|last4=Friedjung|first4=M.|last5=Viotti|first5=R.|year=1992}} 7. ^{{cite journal|bibcode= 2012MNRAS.427..343M|title= Fundamental parameters and infrared excesses of Hipparcos stars|journal= Monthly Notices of the Royal Astronomical Society|volume= 427|pages= 343|author1= McDonald|first1= I.|last2= Zijlstra|first2= A. A.|last3= Boyer|first3= M. L.|year= 2012|doi= 10.1111/j.1365-2966.2012.21873.x|arxiv = 1208.2037 }} 8. ^{{cite journal|bibcode=1998A&AS..128..447V|title=Optical and near-IR observations of variable stars with AURELIE|journal=Astronomy and Astrophysics Supplement|volume=128|issue=3|pages=447|author1=Viotti|first1=R.|last2=Rossi|first2=C.|last3=Muratorio|first3=G.|year=1998|doi=10.1051/aas:1998156}} 9. ^{{cite journal|bibcode=1998ApJS..119...83P|title=Ultraviolet and Optical Studies of Binaries with Luminous Cool Primaries and Hot Companions. V. The Entire IUE Sample|journal=The Astrophysical Journal Supplement Series|volume=119|pages=83|author1=Parsons|first1=Sidney B.|last2=Ake|first2=Thomas B.|year=1998|doi=10.1086/313152}} 10. ^{{cite journal|bibcode=1966VeBon..74....1V|title=Untersuchungen uber die Eigenbewegungen von Sternhaufen. XII. NGC 2422, NGC 2423, NGC 7209 und An. Bakhatova I im Sel. Area 40|journal=Veroeff. Univ. Sternw. Bonn|volume=74|pages=1|author1=Van Schewick|first1=H.|year=1966}} 11. ^{{cite journal|bibcode=2000A&AS..146..251B|arxiv=astro-ph/0010306|title=Absolute proper motions of open clusters. I. Observational data|journal=Astronomy and Astrophysics Supplement|volume=146|issue=2|pages=251|author1=Baumgardt|first1=H.|last2=Dettbarn|first2=C.|last3=Wielen|first3=R.|year=2000|doi=10.1051/aas:2000362}} 11 : Puppis|M-type supergiants|Slow irregular variables|Objects with variable star designations|B-type main-sequence stars|Emission-line stars|Spectroscopic binaries|Durchmusterung objects|Hipparcos objects|Henry Draper Catalogue objects|HR objects |
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