| 词条 | QZ Carinae |
| 释义 |
| name=QZ Carinae }}{{Starbox image | image ={{Location mark |image=The spectacular star-forming Carina Nebula imaged by the VLT Survey Telescope.jpg |alt= |label=QZ Carinae |background= |position=right |width=300 |x=591 |y=661 |float=center |mark=Cercle rouge 100%.svg |mark_width=12 |mark_link=QZ Carinae }} | caption = QZ Carinae (circled) in the Carina Nebula | credit = ESO }}{{Starbox observe | epoch=J2000 | ra={{RA|10|44|22.91114}}[1] | dec={{DEC|−59|59|35.9550}}[1] | appmag_v =6.24[3] {{nowrap|(6.16 - 6.49[2])}} | constell=Carina }}{{Starbox character | class=A1: O9.7I A2: B2V B1: O8III B2: O9V[3] | b-v=+0.13[4] | u-b=−0.84[4] | variable=β Lyr[2] }}{{Starbox astrometry | radial_v=−2.80[5] | prop_mo_ra=−6.63[1] | prop_mo_dec=2.48[1] | parallax=1.67 | p_error=0.40 | parallax_footnote=[1] | dist_pc=2,300[3] | absmag_v= }}{{Starbox detail | component1=A1 | mass=40[3] | radius=22.5[3] | luminosity=500,000[3] | temperature=32,000[3] | metal= | rotation= | age_myr= }}{{Starbox detail|no_heading=y | component1=A2 | mass=10[3] | radius=6.0[3] | luminosity=5,000[3] | temperature=20,000[3] | metal= | rotation= | age_myr= }}{{Starbox detail|no_heading=y | component1=B1 | mass=14.1[3] | radius=26.9[3] | luminosity=200,000[3] | temperature=32,573[3] | metal= | rotation= | age_myr= }}{{Starbox detail|no_heading=y | component1=B2 | mass=28[3] | radius=8.9[3] | luminosity=79,000[3] | temperature=32,463[3] | metal= | rotation= | age_myr= }}{{Starbox orbit | reference = [3] | primary = A | name = B | period = ~25.4 | period_unitless = | axis = | axis_unitless = ~35 AU | eccentricity = 0.0 | inclination = 60 | node = | periastron = | periarg = | periarg_primary = | k1 = | k2 = }}{{Starbox orbit|no_heading=y | reference = [3] | primary = A1 | name = A2 | period = | period_unitless = 20.72 days | axis = | axis_unitless = {{solar radius|116}} | eccentricity = 0.34 | inclination = 60 | node = | periastron = | periarg = 141 | periarg_primary = | k1 = | k2 = }}{{Starbox orbit|no_heading=y | reference = [3] | primary = B1 | name = B2 | period = | period_unitless = 5.999 days | axis = | axis_unitless = {{solar radius|49}} | eccentricity = 0.1 | inclination = 86 | node = | periastron = | periarg = ~20 | periarg_primary = | k1 = | k2 = }}{{Starbox catalog | names=QZ Car, HD 93206, HIP 52526, CD−59 3287, GC 14784, SAO 238414, GSC 08626-02523 }}{{Starbox reference | Simbad=QZ+Car }}{{Starbox end}} QZ Carinae (HD 93206) is a multiple star system in the constellation Carina. It is the brightest member of the loose open cluster Collinder 228 and one of the brightest stars in the Carina Nebula. The apparent magnitude is variable from +6.16 to +6.49 with a period of 6 days. DescriptionQZ Carinae is approximately 2,300 parsecs (7,500 light-years) from Earth in the Carina Nebula star-forming region. It is composed of four massive luminous stars, designated A1 and A2, and B1 and B2. The A1/A2 and B1/B2 pairs take no more than 25 years to orbit each other, while the A pair completes an orbit around each other every 20.7 days and the B pair every 6.0 days. The system is bright at x-ray wavelengths primarily due to colliding stellar winds in the two close pairs. Pair A1/A2 contributes the bulk of the x-ray luminosity.[3] ComponentsQZ Carinae A1 is a blue supergiant of spectral type O9.7I with around 40 times the Sun's mass that has expanded to 22.5 times the Sun's radius. With a surface temperature of 32,000 K, it is around 500,000 times as luminous as the Sun. Its partner A2 is a blue-white main sequence star of spectral type B2V with around 10 times the Sun's mass and 6 times its radius. With a surface temperature of 20,000 K, it is around 5,000 times as luminous as the Sun. QZ Carinae B1 is a hot blue giant that is expanding and cooling away from the main sequence. It is of spectral type O8III with around 14.1 times the Sun's mass and 26.9 times its radius. With a surface temperature of 32,573 K, it is around 200,000 times as luminous as the Sun. Partner B2 is a hot main sequence star of spectral type O9V with around 28 times the Sun's mass and 8.9 times its radius. With a surface temperature of 32,463 K, it is around 80,000 times as luminous as the Sun. Star B1 is less massive than B2 and is assumed to have undergone significant mass loss or mass transfer to B2.[3] Together, all four stars have a combined mass 94 times that of the Sun.[35] VariabilityStar B is a Beta Lyrae variable eclipsing system. It causes the apparent magnitude of the system to vary regularly every 5.999 days from +6.16 at maximum to +6.49 at the primary minimum and +6.43 at the secondary minimum.[2] It was first noted to be variable in 1972 by observers in Auckland.[6] 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 }} 2. ^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|pages=02025|author1=Samus|first1=N. N.|last2=Durlevich|first2=O. V.|year=2009|display-authors=etal}} 3. ^1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 {{cite journal|display-authors= 4|author= Parkin, E. R.|author2= Broos, P. S.|author3= Townsley, L. K.|author4= Pittard, J. M.|author5= Moffat, A. F. J.|author6= Nazé, Y.|author7= Rauw, G.|author8= Oskinova, L. M.|author9= Waldron, W. L.|date=2011|title=X-ray emission from the double-binary OB-star system QZ Car (HD 93206)|journal=The Astrophysical Journal Supplement|volume=194|issue=1|pages=article id. 8, 11 pp.|bibcode=2011ApJS..194....8P|arxiv = 1103.0794 |doi = 10.1088/0067-0049/194/1/8 }} 4. ^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}} 5. ^{{cite journal|last1=Pourbaix|first1=D.|last2=Tokovinin|first2=A. A.|last3=Batten|first3=A. H.|last4=Fekel|first4=F. C.|last5=Hartkopf|first5=W. I.|last6=Levato|first6=H.|last7=Morrell|first7=N. I.|last8=Torres|first8=G.|last9=Udry|first9=S.|title=SB9: The ninth catalogue of spectroscopic binary orbits|journal=Astronomy and Astrophysics|volume=424|issue=2|year=2004|pages=727–732|issn=0004-6361|doi=10.1051/0004-6361:20041213|bibcode=2004A&A...424..727P|arxiv = astro-ph/0406573 }} 6. ^1 {{cite journal|bibcode=1972IBVS..681....1W|title=HD 93206 (CSV 6797) an Eclipsing System Presenting Observational Problems|date=May 1972|last1=Walker|first1=W. S. G|last2=Marino|first2=B. F.|journal=Information Bulletin on Variable Stars|volume=681|number=1|pages=1}} External linksCollinder 228 SEDS.org {{Stars of Carina}} 12 : Carina (constellation)|Carina Nebula|Beta Lyrae variables|Objects with variable star designations|Henry Draper Catalogue objects|O-type supergiants|B-type main-sequence stars|O-type giants|O-type main-sequence stars|Multiple star systems|Durchmusterung objects|Hipparcos objects |
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