| 词条 | YZ Cassiopeiae |
| 释义 |
| name=YZ Cas }}{{Starbox image | image={{Location mark |image=Cassiopeia constellation map.svg|alt=|float=center|width=260 |label=|position=right |mark=Red circle.svg|mark_width=8|mark_link=YZ Cas |x=470|y=100 }} |caption=Location of YZ Cassiopeiae (circled) }}{{Starbox observe 2s | epoch=J2000 | constell=Cassiopeia | component1 = A | ra1={{RA|00|45|39.0777}}[1] | dec1={{DEC|+74|59|17.063}}[1] | appmag_v1=5.653[3] | component2 = B | ra2={{RA|00|45|42,1503}}[4] | dec2={{DEC|+74|58|43.242}}[4] | appmag_v2=11.23[6] }}{{Starbox character | component1 = A | class={{nowrap|A2IV[7] (A1Vm + F2V[8])}} | b-v=+0.05[6] | u-b=+0.07[6] | variable=Algol[11] | component2 = B | class2=F2V[12] | b-v2=+0.94[6] | u-b2=+0.64[6] | variable2= }}{{Starbox astrometry | radial_v=+8.90±0.4[15] | prop_mo_ra=−15.07[1] | prop_mo_dec=−22.17[1] | parallax=11.24 | p_error=0.55 | parallax_footnote=[1] | dist_pc = 103.8[12] | absmag_v=+0.251[8] }}{{Starbox visbin | reference=[21] | name=TYC 4307-2168-1 | period=86 580 | axis= | eccentricity= | inclination= | node= | periarg= | periastron= }}{{Starbox orbit | reference = [12] | primary = Aa | name = Ab | period_unitless = 4.467 days | eccentricity = 0.0 | inclination = 88.332 | axis_unitless = {{solar radius|17.47}}[23] }}{{Starbox detail | component1 = Aa | mass = 2.308[23] | temperature = 9,200[23] | radius = 2.547[23] | luminosity = 41.69[23] | gravity = 3.988[12] | rotational_velocity = 29.2[12] | component2 = Ab | mass2 = 1.325[30] | temperature2 = 6,890[30] | radius2 = 1.359[23] | luminosity2 = 3.34[23] | gravity2 = 4.311[12] | rotational_velocity2 = 15.0[12] | metal_fe2 = +0.10[30] | age_myr2 = 490 - 550[12] }}{{Starbox catalog | names=21 Cassiopeiae, HR 192, BD+74 27, HD 4161, SAO 4216, HIP 3572, GC 891, ADS 624 A, CCDM J00457+7459[1] }}{{Starbox reference | Simbad = YZ+Cas }}{{Starbox end}}YZ Cassiopeiae (21 Cas) is a star system {{convert|103.8|pc|ly|lk=on}} away from Earth, in the constellation Cassiopeia. It comprises three stars: an eclipsing Algol-type binary and a visually fainter star about 3000 AU distant.[21] The primary star in the YZ Cassiopeiae system is a white subgiant (main sequence) star of spectral type A1Vm and 2.31 solar masses[21] ({{Solar mass|link=y}}) with a less massive main sequence dwarf star of type F2V[2] and 1.35 {{Solar mass|link=y}}.[21] The apparent magnitude of the eclipsing binary varies from 5.65 to 6.05[2] with a period of 4.4672 days.[21] Combined, they appear to have a spectral type of A2IV.[21] The binary has a dimmer (magnitude 9.7 according to Norton, or 10.5 by SIMBAD) companion of 0.8 {{Solar mass}}[21] orbiting with a period of about 86 580 years.[21] References1. ^{{cite simbad|title=V* YZ Cas|accessdate=26 January 2018}} [3][4][5][6][7][8][9][10][11][12][13]2. ^1 2 Jerzy M. Kreiner, Chun-Hwey Kim, Il-Seong Nha. YZ CAS: Atlas of O-C Diagrams of Eclipsing Binary Stars 3. ^1 2 3 4 5 6 7 8 Tokovinin 1997-1999. J/A+AS/124/75. Multiple star catalogue (MSC) 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|display-authors=etal|author1=Samus|first1=N. N.|last2=Durlevich|first2=O. V.|year=2009}} 5. ^1 2 3 4 5 {{cite journal | first=F. | last=van Leeuwen |date=November 2007 | title=Validation of the new Hipparcos reduction | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 |arxiv = 0708.1752 }} 6. ^1 {{cite journal|bibcode=1999A&AS..137..451G|title=Radial velocities. Measurements of 2800 B2-F5 stars for HIPPARCOS|journal=Astronomy and Astrophysics Supplement|volume=137|issue=3|pages=451|author1=Grenier|first1=S.|last2=Baylac|first2=M.-O.|last3=Rolland|first3=L.|last4=Burnage|first4=R.|last5=Arenou|first5=F.|last6=Briot|first6=D.|last7=Delmas|first7=F.|last8=Duflot|first8=M.|last9=Genty|first9=V.|last10=Gómez|first10=A. E.|last11=Halbwachs|first11=J.-L.|last12=Marouard|first12=M.|last13=Oblak|first13=E.|last14=Sellier|first14=A.|year=1999|doi=10.1051/aas:1999489}} 7. ^1 2 3 4 5 {{cite journal|bibcode=1963AJ.....68..483E|title=Three-color photometry of the components in 228 wide double and multiple systems|journal=Astronomical Journal|volume=68|pages=483|author1=Eggen|first1=O. J.|year=1963|doi=10.1086/109000}} 8. ^1 2 {{cite journal|bibcode=1998A&A...335L..65H|title=The TYCHO Reference Catalogue|journal=Astronomy and Astrophysics|volume=335|pages=L65|author1=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}} 9. ^1 {{cite journal|bibcode=2006AstL...32..759G|title=Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system|journal=Astronomy Letters|volume=32|issue=11|pages=759|author1=Gontcharov|first1=G. A.|year=2006|doi=10.1134/S1063773706110065|arxiv = 1606.08053 }} 10. ^1 2 {{cite journal|bibcode=2008AN....329..835B|arxiv=0806.1290|title=New absolute magnitude calibrations for detached binaries|journal=Astronomische Nachrichten|volume=329|issue=8|pages=835|author1=Bilir|first1=S.|last2=Ak|first2=T.|last3=Soydugan|first3=E.|last4=Soydugan|first4=F.|last5=Yaz|first5=E.|last6=Filiz Ak|first6=N.|last7=Eker|first7=Z.|last8=Demircan|first8=O.|last9=Helvaci|first9=M.|year=2008|doi=10.1002/asna.200811002}} 11. ^1 2 3 {{cite journal|bibcode=2015A&A...575A..36M|arxiv=1412.7891|title=Bayesian mass and age estimates for transiting exoplanet host stars|journal=Astronomy & Astrophysics|volume=575|pages=A36|author1=Maxted|first1=P. F. L.|last2=Serenelli|first2=A. M.|last3=Southworth|first3=J.|year=2015|doi=10.1051/0004-6361/201425331}} 12. ^1 2 3 4 5 6 7 {{cite journal|bibcode=2015AJ....149..131E |title=Main-Sequence Effective Temperatures from a Revised Mass-Luminosity Relation Based on Accurate Properties |journal=The Astronomical Journal |volume=149 |issue=4 |pages=131 |author1=Eker |first1=Z. |last2=Soydugan |first2=F. |last3=Soydugan |first3=E. |last4=Bilir |first4=S. |last5=Yaz Gökçe |first5=E. |last6=Steer |first6=I. |last7=Tüysüz |first7=M. |last8=Şenyüz |first8=T. |last9=Demircan |first9=O. |year=2015 |doi=10.1088/0004-6256/149/4/131 |arxiv = 1501.06585 }} 13. ^1 2 3 4 5 6 7 8 {{cite journal|bibcode=2014MNRAS.438..590P|arxiv=1311.3482|title=Absolute dimensions of detached eclipsing binaries - III. The metallic-lined system YZ Cassiopeiae|journal=Monthly Notices of the Royal Astronomical Society|volume=438|pages=590|author1=Pavlovski|first1=K.|last2=Southworth|first2=J.|last3=Kolbas|first3=V.|last4=Smalley|first4=B.|year=2014|doi=10.1093/mnras/stt2229}} }}{{Sky|00|45|39.0777|+|74|59|17.063|290}}{{Stars of Cassiopeia}} 11 : Triple star systems|Eclipsing binaries|Cassiopeia (constellation)|A-type subgiants|F-type main-sequence stars|Flamsteed objects|Objects with variable star designations|Durchmusterung objects|Henry Draper Catalogue objects|Hipparcos objects|HR objects |
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