| 释义 |
- References
{{Starbox begin
| name = ξ Eridani}}{{Starbox observe
| epoch = J2000.0
| equinox = J2000.0 (ICRS)
| constell = Eridanus
| ra = {{RA|04|23|40.85270}}
| dec = {{DEC|−03|44|43.6771}}
| appmag_v = 5.17[3]
}}{{Starbox character
| class = A2 V[4]
| u-b = +0.08[3]
| b-v = +0.08[3]
| r-i =
}}{{Starbox astrometry
| radial_v = −11.0[7]
| prop_mo_ra = −47.36
| prop_mo_dec = −54.91
| parallax = 15.60
| p_error = 0.25
| parallax_footnote =
| absmag_v= +1.59[11]
}}{{Starbox detail
| mass = 2.29[12]
| radius = 2.2[13]
| luminosity = 27.6[14]
| temperature = 8,400[14]
| gravity = 3.73[16]
| metal_fe =
| rotational_velocity = {{Val|194.3|2.3}}[4]
| rotation =
| age_myr = 450[12]
}}{{Starbox catalog
| names = ξ Eri, BD−04° 818, 42 Eridani, FK5 1120, HD 27861, HIP 20507, HR 1383, SAO 131176.[19]
}}{{Starbox reference
| Simbad = ksi+Eri
}}{{Starbox end}}ξ Eridani (Latinised as Xi Eridani) is a solitary[12] star in the constellation Eridanus. With an apparent visual magnitude of 5.17,[3] it is faintly visible to the naked eye on a clear, dark night. Based upon an annual parallax shift of 0.00156 arcseconds,[ it is located around 209 light years from the Sun. The star is considered a member of the Sirius supercluster.[11]]This is an ordinary A-type main sequence star with a stellar classification of A2 V,[4] indicating that it is generating energy through the thermonuclear fusion of hydrogen into helium in its core region. It is around 450[12] million years old and has a relatively high rate of rotation with a projected rotational velocity of 194 km/s.[4] The star has about 2.3 times the mass of the Sun,[12] 2.2 times the Sun's radius,[13] and radiates 27.6[14] times the solar luminosity from its outer atmosphere at an effective temperature of 8,400 K.[14] References1. ^1 2 {{citation | title=The Sirius Supercluster and Missing Mass near the Sun | last1=Eggen | first1=Olin J. | journal=The Astronomical Journal | postscript=. | volume=116 | issue=2 | pages=782–788 | date=August 1998 | doi=10.1086/300465 | bibcode=1998AJ....116..782E }}
2. ^1 2 3 4 {{citation | display-authors=1 | last1=Díaz | first1=C. G. | last2=González | first2=J. F. | last3=Levato | first3=H. | last4=Grosso | first4=M. | title=Accurate stellar rotational velocities using the Fourier transform of the cross correlation maximum | journal=Astronomy & Astrophysics | volume=531 | page=A143 |date=July 2011 | doi=10.1051/0004-6361/201016386 | bibcode=2011A&A...531A.143D | arxiv=1012.4858 | postscript=. }}
3. ^1 {{citation | display-authors=1 | last1=Wielen | first1=R. | last2=Schwan | first2=H. | last3=Dettbarn | first3=C. | last4=Lenhardt | first4=H. | last5=Jahreiß | first5=H. | last6=Jährling | first6=R. | title=Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions | publisher=Veröffentlichungen des Astronomisches Rechen-Institut Heidelberg | volume=35 | date=1999 | postscript=. | bibcode=1999VeARI..35....1W }}
4. ^1 2 3 4 5 {{citation | display-authors=1 | last1=De Rosa, R. J. | last2=Patience, J. | last3=Wilson, P. A. | last4=Schneider, A. | last5=Wiktorowicz, S. J. | last6=Vigan, A. | last7=Marois, C. | last8=Song, I. | last9=Macintosh, B. | last10=Graham, J. R. | last11=Doyon, R. | last12=Bessell, M. S. | last13=Thomas, S. | last14=Lai, O. | title=The VAST Survey – III. The multiplicity of A-type stars within 75 pc | journal=Monthly Notices of the Royal Astronomical Society | volume=437 | issue=2 | pages=1216–1240 | date=January 2014 | doi=10.1093/mnras/stt1932 | bibcode=2014MNRAS.437.1216D | arxiv=1311.7141 | postscript=. }}
5. ^1 2 3 4 {{citation | display-authors=1 | last1=McDonald | first1=I. | last2=Zijlstra | first2=A. A. | last3=Boyer | first3=M. L. | title=Fundamental Parameters and Infrared Excesses of Hipparcos Stars | journal=Monthly Notices of the Royal Astronomical Society | volume=427 | issue=1 | pages=343–57 | date=2012 | bibcode=2012MNRAS.427..343M | arxiv=1208.2037 | doi=10.1111/j.1365-2966.2012.21873.x | postscript=. }}
6. ^1 {{citation | display-authors=1 | last1=King | first1=Jeremy R. | last2=Villarreal | first2=Adam R. | last3=Soderblom | first3=David R. | last4=Gulliver | first4=Austin F. | last5=Adelman | first5=Saul J. | title=Stellar Kinematic Groups. II. A Reexamination of the Membership, Activity, and Age of the Ursa Major Group | journal=The Astronomical Journal | volume=125 | issue=4 | pages=1980–2017 |date=April 2003 | doi=10.1086/368241 | bibcode=2003AJ....125.1980K | postscript=. }}
7. ^1 2 {{citation | display-authors=1 | last1=Pasinetti Fracassini | first1=L. E. | last2=Pastori | first2=L. | last3=Covino | first3=S. | last4=Pozzi | first4=A. | title=Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) – Third edition – Comments and statistics | journal=Astronomy and Astrophysics | volume=367 | issue=2 | pages=521–524 | date=February 2001 | doi=10.1051/0004-6361:20000451 | bibcode=2001A&A...367..521P | arxiv=astro-ph/0012289 | postscript=. }}
8. ^1 2 3 4 {{citation | last1=Mermilliod | first1=J.-C. | title=Compilation of Eggen's UBV data, transformed to UBV (unpublished) | journal=SIMBAD | date=1986 | bibcode=1986EgUBV........0M | postscript=. }}
9. ^1 {{cite simbad | title=* ksi Eri | accessdate=2016-11-03 | postscript=. }}
[1][2][3][4][5][6][7][8][9]
}}{{Stars of Eridanus|state=collapsed}} 8 : A-type main-sequence stars|Eridanus (constellation)|Bayer objects|Flamsteed objects|Henry Draper Catalogue objects|Hipparcos objects|HR objects|Durchmusterung objects |