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天纪一:修订间差异

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{{Starbox begin
{{Starbox begin
| name = 北冕座ξ
| name =天紀一 (ξ CrB)
}}
}}
{{Starbox observe
{{Starbox observe
| epoch = [[J2000.0]]
| epoch = [[J2000.0]]
| equinox = [[J2000.0]] ([[國際天球參考系|ICRS]])
| constell = [[北冕座]]<ref name=SIMBAD>{{cite web
| constell = [[北冕座]]
| url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=HR+6103
| 星官 = [[天紀 (星官)|天紀]]([[天市垣]])
| title =Pulsating variable Star
| ra = {{RA|16|22|05.82391}}<ref name=vanLeeuwen2007/>
| publisher=Centre de Données astronomiques de Strasbourg
| dec = {{DEC|+30|53|31.1837}}<ref name=vanLeeuwen2007/>
| work=SIMBAD
| accessdate=2012-07-13}}</ref><ref name=DATA>{{cite web
| appmag_v = 4.85<ref name=Johnson1966/>
| url=http://vizier.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=5050&-corr=PK=HR&-out.max=9999&HR=6103
| title =VizieR Detailed Page
| accessdate=2012-07-13}}</ref>
| 星官 =
| ra = {{RA|16|22|5.8}}<ref name=SIMBAD /><ref name=DATA />
| dec = {{DEC|+30|53|31}}<ref name=SIMBAD /><ref name=DATA />
| appmag_v = 4.85<ref name=SIMBAD /><ref name=DATA />
}}
}}
{{Starbox character
{{Starbox character
| class = K0III<ref name=SIMBAD /><ref name=DATA />
| class = K0&nbsp;III<ref name=Eggleton2008/>
| b-v = 0.97<ref name=SIMBAD /><ref name=DATA />
| b-v = +0.97<ref name=Johnson1966/>
| u-b = 0.8<ref name=SIMBAD /><ref name=DATA />
| u-b = +0.80<ref name=Johnson1966/>
| r-i =
| r-i = 0.46<ref name=SIMBAD /><ref name=DATA />
| variable =
| variable =
}}
}}
{{Starbox astrometry
{{Starbox astrometry
| radial_v = 0.8
| radial_v = {{Val|−29.20|0.16}}<ref name=Massarotti2008/>
| prop_mo_ra = -29
| prop_mo_ra = −97.43<ref name=vanLeeuwen2007/>
| prop_mo_dec = +107.45<ref name=vanLeeuwen2007/>
| parallax = 0.016
| p_error =
| parallax = 17.78
| p_error = 0.25
| parallax_footnote = <ref name=vanLeeuwen2007/>
| absmag_v = +1.04<ref name=Takeda2008/>
}}
{{Starbox detail
| source = <ref name=Massarotti2008/>
| mass = 2.36<ref name=Takeda2008/>
| radius = 8
| luminosity = 36
| temperature = {{Val|4853|5|fmt=commas}}
| gravity = 2.9
| metal_fe = −0.08
| rotational_velocity = 2.8
| age_myr = 676<ref name=Takeda2008/>
}}
}}
{{Starbox catalog
{{Starbox catalog
| names = [[拜耳命名法|ξ&nbsp;CrB]]、[[佛蘭斯蒂德命名法|19 CrB]]、 [[波昂星表|BD]]+31° 2845、[[HD星表|HD]]147677、[[依巴谷星表|HIP]] 80181、 [[亮星星表|HR]] 6103、[[SAO星表|SAO]]65254、[[華盛頓雙星目錄|WDS]] J16221+3054A<ref name=SIMBAD/>
| names =BD+31 2845,[[SAO星表|SAO]] 65254,[[HD星表|HD]] 147677,[[HR星表|HR]] 6103}}
}}
{{Starbox reference |Simbad=HR+6103}}
{{Starbox reference
| Simbad = ksi+CrB
}}
{{Starbox end}}
{{Starbox end}}


'''天紀一'''('''ξ CrB''')是在北天[[星座]][[北冕座]]的一對[[聯星]]系統<ref name=Eggleton2008/>。它是肉眼可見的,綜合[[視星等]]為4.85<ref name=Johnson1966/>。基於從地球上看每年偏移17.78[[毫角秒|mas]]的[[恆星視差|視差]] <ref name=vanLeeuwen2007/>,它距離[[太陽]]約183[[光年]]。
'''北冕座ξ''',又名'''BD+31 2845''','''HD 147677'''、'''SAO 65254'''、'''HR 6103''',是[[北冕座]]的一颗恒星<ref name=SIMBAD /><ref name=DATA />,视星等为4.85,位于[[銀道座標系|銀經]]50.77,[[銀道座標系|銀緯]]44.21,其[[B1900.0]]坐标为赤經{{RA|16|18|12}},赤緯{{DEC|+31|44.21|26}}。


截至 2009 年,該聯星對的[[角距離]]為91MAS,[[位置角]]為139.4°<ref name=Hartkopf2009/>。較亮的成員,主星Aa<ref name=Hartkopf2009/>,是一顆[[恆星演化|演化]]的[[橙矮星|K型]][[巨星]],[[恆星分類]]為K0 III<ref name=Eggleton2008/>。它是一顆[[紅群聚]]恆星,通過[[氦融合]]在其[[恆星核心|核心]]產生能量<ref name=Alves2000/>。估計這顆恆星的質量是[[太陽質量]]的2.36倍,並且已經膨脹到[[太陽半徑]]的8倍。它在4,853K的[[有效溫度]]下,從其[[光球]]輻射的[[光度]]是[[太陽光度]]的36倍<ref name=Massarotti2008/>。
== 参考文献 ==

{{reflist}}
== 參考資料 ==
{{reflist|refs=

<ref name=vanLeeuwen2007>{{citation
| title=Validation of the new Hipparcos reduction
| last1=van Leeuwen | first1=F.
| journal=Astronomy and Astrophysics
| volume=474 | issue=2 | pages=653–664 | date=2007
| arxiv=0708.1752 | bibcode=2007A&A...474..653V
| doi=10.1051/0004-6361:20078357 | s2cid=18759600 | postscript=. }}</ref>

<ref name=Alves2000>{{citation
| last1=Alves | first1=David R.
| title=K-Band Calibration of the Red Clump Luminosity
| journal=The Astrophysical Journal
| volume=539 | issue=2 | pages=732–741 | date=August 2000
| doi=10.1086/309278 | bibcode=2000ApJ...539..732A
| arxiv=astro-ph/0003329 | s2cid=16673121
| postscript=. }}</ref>

<ref name=Hartkopf2009>{{citation
| title=Speckle Interferometry at Mount Wilson Observatory: Observations Obtained in 2006-2007 and 35 New Orbits
| journal=The Astronomical Journal | postscript=.
| volume=138 | issue=3 | pages=813 | year=2009
| last1=Hartkopf | first1=William I. | last2=Mason | first2=Brian D.
| bibcode=2009AJ....138..813H | doi=10.1088/0004-6256/138/3/813 | url=https://apps.dtic.mil/sti/pdfs/ADA505053.pdf| archive-url=https://web.archive.org/web/20170925092738/http://www.dtic.mil/get-tr-doc/pdf?AD=ADA505053| url-status=live| archive-date=September 25, 2017| doi-access=free }}</ref>

<ref name=Takeda2008>{{citation
| display-authors=1 | last1=Takeda | first1=Yoichi
| last2=Sato | first2=Bun'ei | last3=Murata | first3=Daisuke
| title=Stellar Parameters and Elemental Abundances of Late-G Giants
| journal=Publications of the Astronomical Society of Japan
| volume=60 | issue=4 | pages=781–802 | date=August 2008
| bibcode=2008PASJ...60..781T | doi=10.1093/pasj/60.4.781
| arxiv = 0805.2434 | s2cid=16258166 | postscript=.}}</ref>

<ref name=Eggleton2008>{{citation
| last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A.
| title=A catalogue of multiplicity among bright stellar systems
| journal=[[Monthly Notices of the Royal Astronomical Society]]
| volume=389 | issue=2 | pages=869–879 | date=September 2008
| doi=10.1111/j.1365-2966.2008.13596.x | bibcode=2008MNRAS.389..869E
| postscript=. |arxiv = 0806.2878 | s2cid=14878976 }}</ref>

<ref name=Massarotti2008>{{citation | display-authors=1
| last1=Massarotti | first1=Alessandro | last2=Latham | first2=David W.
| last3=Stefanik | first3=Robert P. | last4=Fogel | first4=Jeffrey
| title=Rotational and radial velocities for a sample of 761 HIPPARCOS giants and the role of binarity
| journal=The Astronomical Journal | postscript=.
| volume=135 | issue=1 | pages=209–231 | date=January 2008
| doi=10.1088/0004-6256/135/1/209 | bibcode=2008AJ....135..209M | s2cid=121883397 | doi-access=free }}</ref>

<ref name=Johnson1966>{{citation | display-authors=1
| last1=Johnson | first1=H. L. | last2=Iriarte | first2=B.
| last3=Mitchell | first3=R. I. | last4=Wisniewskj | first4=W. Z.
| title=UBVRIJKL photometry of the bright stars
| journal=Communications of the Lunar and Planetary Laboratory
| volume=4 | issue=99 | year=1966
| page=99 | bibcode=1966CoLPL...4...99J | postscript=. }}</ref>

<ref name=SIMBAD>{{cite simbad
| title=ksi CrB
| access-date=2017-05-03 }}</ref>

}}


{{北冕座|state=collapsed}}
{{star-stub}}


{{DEFAULTSORT:Xi Coronae Borealis}}
{{北冕座恒星}}
[[Category:K型巨星]]
[[Category:水平分支星]]
[[Category:聯星]]
[[Category:北冕座]]
[[Category:北冕座]]
[[Category:拜耳天體|北冕座, ξ]]
[[Category: BD、CD和CP天體]]
[[Category:佛氏天體|北冕座, 19]]
[[Category:HD和HDE天體|147677]]
[[Category:HD和HDE天體|147677]]
[[Category:HIP天體|080181]]
[[Category:HR天體|6103]]
[[Category:HR天體|6103]]
[[Category:SAO體|65254]]
[[Category:天纪 (星官)]]

2024年6月25日 (二) 08:52的最新版本

天紀一 (ξ CrB)
觀測資料
曆元 J2000.0
星座 北冕座
星官 天紀天市垣
赤經 16h 22m 05.82391s[1]
赤緯 +30° 53′ 31.1837″[1]
視星等(V) 4.85[2]
特性
光谱分类K0 III[3]
U−B 色指数+0.80[2]
B−V 色指数+0.97[2]
天体测定
徑向速度 (Rv)−29.20±0.16[4] km/s
自行 (μ) 赤经:−97.43[1] mas/yr
赤纬:+107.45[1] mas/yr
视差 (π)17.78 ± 0.25[1] mas
距离183 ± 3 ly
(56.2 ± 0.8 pc)
绝对星等 (MV)+1.04[5]
詳細資料 [4]
質量2.36[5] M
半徑8 R
表面重力 (log g)2.9
亮度36 L
溫度4,853±5 K
金属量 [Fe/H]−0.08 dex
自轉速度 (v sin i)2.8 km/s
年齡676[5] Myr
其他命名
ξ CrB19 CrBBD+31° 2845、HD147677、HIP 80181、 HR 6103、SAO65254、WDS J16221+3054A[6]
參考資料庫
SIMBAD资料

天紀一ξ CrB)是在北天星座北冕座的一對聯星系統[3]。它是肉眼可見的,綜合視星等為4.85[2]。基於從地球上看每年偏移17.78mas視差 [1],它距離太陽約183光年

截至 2009 年,該聯星對的角距離為91MAS,位置角為139.4°[7]。較亮的成員,主星Aa[7],是一顆演化K型巨星恆星分類為K0 III[3]。它是一顆紅群聚恆星,通過氦融合在其核心產生能量[8]。估計這顆恆星的質量是太陽質量的2.36倍,並且已經膨脹到太陽半徑的8倍。它在4,853K的有效溫度下,從其光球輻射的光度太陽光度的36倍[4]

參考資料

[编辑]
  1. ^ 1.0 1.1 1.2 1.3 1.4 1.5 van Leeuwen, F., Validation of the new Hipparcos reduction, Astronomy and Astrophysics, 2007, 474 (2): 653–664, Bibcode:2007A&A...474..653V, S2CID 18759600, arXiv:0708.1752可免费查阅, doi:10.1051/0004-6361:20078357. 
  2. ^ 2.0 2.1 2.2 2.3 Johnson, H. L.; et al, UBVRIJKL photometry of the bright stars, Communications of the Lunar and Planetary Laboratory, 1966, 4 (99): 99, Bibcode:1966CoLPL...4...99J. 
  3. ^ 3.0 3.1 3.2 Eggleton, P. P.; Tokovinin, A. A., A catalogue of multiplicity among bright stellar systems, Monthly Notices of the Royal Astronomical Society, September 2008, 389 (2): 869–879, Bibcode:2008MNRAS.389..869E, S2CID 14878976, arXiv:0806.2878可免费查阅, doi:10.1111/j.1365-2966.2008.13596.x. 
  4. ^ 4.0 4.1 4.2 Massarotti, Alessandro; et al, Rotational and radial velocities for a sample of 761 HIPPARCOS giants and the role of binarity, The Astronomical Journal, January 2008, 135 (1): 209–231, Bibcode:2008AJ....135..209M, S2CID 121883397, doi:10.1088/0004-6256/135/1/209可免费查阅. 
  5. ^ 5.0 5.1 5.2 Takeda, Yoichi; et al, Stellar Parameters and Elemental Abundances of Late-G Giants, Publications of the Astronomical Society of Japan, August 2008, 60 (4): 781–802, Bibcode:2008PASJ...60..781T, S2CID 16258166, arXiv:0805.2434可免费查阅, doi:10.1093/pasj/60.4.781. 
  6. ^ ksi CrB. SIMBAD. 斯特拉斯堡天文資料中心. 
  7. ^ 7.0 7.1 Hartkopf, William I.; Mason, Brian D., Speckle Interferometry at Mount Wilson Observatory: Observations Obtained in 2006-2007 and 35 New Orbits (PDF), The Astronomical Journal, 2009, 138 (3): 813, Bibcode:2009AJ....138..813H, doi:10.1088/0004-6256/138/3/813可免费查阅, (原始内容存档于September 25, 2017). 
  8. ^ Alves, David R., K-Band Calibration of the Red Clump Luminosity, The Astrophysical Journal, August 2000, 539 (2): 732–741, Bibcode:2000ApJ...539..732A, S2CID 16673121, arXiv:astro-ph/0003329可免费查阅, doi:10.1086/309278.