| 词条 | OY Carinae |
| 释义 |
| name = OY Carinae }}{{Starbox observe |epoch=J2000 | constell = Carina | ra = {{RA|10|06|22.07}} | dec = {{DEC|-70|14|04.6}} | appmag_v = +12.2 }}{{Starbox character | class = DA / M6V }}{{Starbox astrometry | dist_ly = 277.1 | dist_pc = 85[1] }}{{Starbox detail | mass = ≈0.7[1]/0.07[3] | radius = 0.011[1]/0.127[2] | luminosity = 0.0055/0.00117 | temperature = 15,000/3,000 }}{{Starbox orbit | period = 0.000172 | axis_unitless = 0.00213 AU | eccentricity = 0.0 | inclination = 83.3 }}{{Starbox catalog | names = OY Car, RX J1006.5-7014, SON 6302, 2MASS J10062206-7014045, SBC9 600, AAVSO 1004-69 }}{{Starbox reference | Simbad = OY+Car }}{{Starbox end}} OY Carinae (abbreviated OY Car) is an eclipsing binary system approximately 277 light-years away from the Sun, classed as cataclysmic variable. The system comprises an eclipsing white dwarf and red dwarf that orbit each other every 1.51 hours, and possibly a yet unconfirmed third low-mass (substellar?) companion. Planetary system?Greenhill et al. (2009) would invoke the presence of a third object to explain orbital period variations with an apparent periodicity of roughly 35 years. The third body could yield a minimum mass 7 times greater than Jupiter and be located 9.5 Astronomical Units away from the cataclysmic variable system,[3] being likely either a massive planetary object or else a very low-mass brown dwarf. It is likely that the apparent change is due to solar-cycle type magnetic activity in the secondary star. Large irregular deviations from the general trend, with time-scales of years, also occur. Further observations will be able to confirm either discard the presence of a substellar companion. {{OrbitboxPlanet begin| table_ref=[3] | period_unit=year }}{{OrbitboxPlanet hypothetical | exoplanet = b | mass = ≥7 | period = 35±3.5 | semimajor = 9.5 | eccentricity = ? }}{{Orbitbox end}} See also
References1. ^1 2 {{cite journal | url=http://www.crya.unam.mx/rmaa/APCM/PDF/apcm_mauche.pdf| author=Mauche| author2=Raymond| last-author-amp=yes| title=The EUV Emission-Line spectrum of OY Carinae in superoutburst: scattering in the wind| journal=Revista Mexicana de Astronomía y Astrofísica, Serie de Conferencias| volume=9|pages=232–233| date=2000}} {{Sky|10|06|22.07|-|70|14|04.6}}{{Stars of Carina}}2. ^1 {{cite journal | doi=10.1086/167557| author=Wood| last2=Horne | first2=Keith | last3=Berriman | first3=Graham | last4=Wade | first4=Richard A.| title=Eclipse studies of the dwarf nova OY Carinae in quiescence| journal=Astrophysical Journal| volume=341|pages=974–994| date=1989| bibcode=1989ApJ...341..974W}} 3. ^1 {{cite journal | doi=10.1111/j.1365-2966.2006.10920.x | arxiv=astro-ph/0602331| author=Greenhill| display-authors=4| last2=Hill | first2=K. M. | last3=Dieters | first3=S. | last4=Fienberg | first4=K. | last5=Howlett | first5=M. | last6=Meijers | first6=A. | last7=Munro | first7=A. | last8=Senkbeil | first8=C.| title=Decrease in the orbital period of dwarf nova OY Carinae| journal=Monthly Notices of the Royal Astronomical Society| volume=372|issue=3 |pages=1129–1132| date=2006| bibcode=2006MNRAS.372.1129G}} 7 : Carina (constellation)|Eclipsing binaries|Planetary systems|Hypothetical planetary systems|Objects with variable star designations|White dwarfs|M-type main-sequence stars |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。