右攝提二:修订间差异
外观
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{{Starbox begin |
{{Starbox begin |
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| name = |
| name = 牧夫座τ |
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}} |
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{{Starbox image |
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| image = |
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<div style="position: relative">[[Image:Boötes constellation map.png|250px|alt=Diagram showing star positions and boundaries of the Eridanus constellation and its surroundings]] |
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<div style="position: absolute; left: 211px; top: 305px">[[File:Cercle rouge 100%.svg|10px]]</div> |
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</div> |
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| caption = 在[[星圖]]上呈現的牧夫座,以圓圈標示出牧夫座τ的位置。 |
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}} |
}} |
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{{Starbox observe |
{{Starbox observe |
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| epoch = |
| epoch = J2000.0 |
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| constell = [[牧夫座]] |
| constell = [[牧夫座]] |
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| 星官 = [[ |
| 星官 = [[左攝提]] ([[亢宿]] |
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| ra = {{RA| |
| ra = {{RA|13|47|15.74}} <ref name="hipparcos"/> |
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| dec = {{DEC| |
| dec = {{DEC|+17|27|24.9}} <ref name="hipparcos"/> |
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| appmag_v = 4. |
| appmag_v = 4.50<ref name=aaa352_495/> |
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}} |
}} |
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{{Starbox character |
{{Starbox character |
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| class = |
| class = F6 IV<ref name=aaa352_495/> |
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| |
| r-i = 0.24 |
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| |
| v-r = |
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| b-v = 0.48<ref name=aaa352_495/> |
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| variable = |
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| u-b = 0.04 |
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| variable = [[變星]] |
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}} |
}} |
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{{Starbox astrometry |
{{Starbox astrometry |
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| radial_v = |
| radial_v = -15.6 |
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| prop_mo_ra = -479.53 |
| prop_mo_ra = -479.53 ± 0.16 <ref name="hipparcos"/> |
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| prop_mo_dec = 53.49 |
| prop_mo_dec = 53.49 ± 0.13 <ref name="hipparcos"/> |
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| parallax = 64.03 |
| parallax = 64.03 |
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| p_error = 0.19 |
| p_error = 0.19 |
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| parallax_footnote = <ref name="hipparcos"/> |
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| absmag_v = 3.54 |
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| absmag_v = 3.53 |
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}} |
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{{Starbox detail |
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| mass = 1.3 / 0.4 |
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| radius =1.331 ± 0,027 |
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| luminosity = 3.0<ref name=aaa352_495/> |
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| temperature = 6,360<ref name=aar17_3_251/> |
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| gravity = 4.30<ref name=aaa352_495/> |
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| metal = 210%{{Citation needed|date=February 2012}} |
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| rotation = 3.31 days<ref name=aar17_3_251/> |
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| rotational_velocity = 14 |
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| age_gyr = {{nowrap|1.6–2.3}} <ref name="Mamajek2008"/> |
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}} |
}} |
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{{Starbox catalog |
{{Starbox catalog |
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| names = [[Flamsteed designation|4 Boötis]], [[Star catalogue#ADS|ADS]] 9025, [[Durchmusterung|BD]]+18°2782, [[Catalog of Components of Double and Multiple Stars|CCDM]] 13473+1727, [[Fifth Fundamental Catalogue|FK5]] 507, [[Boss General Catalogue|GC]] 18637, [[General Catalogue of Trigonometric Parallaxes|GCTP]] 3144.00, [[Gliese-Jahreiss catalogue|GJ]] 527, [[Henry Draper catalogue|HD]] 120136, [[Hipparcos catalogue|HIP]] 67275, [[Harvard Revised catalogue|HR]] 5185, [[Luyten Two-Tenths catalogue|LTT]] 14021, [[Smithsonian Astrophysical Observatory Star Catalogue|SAO]] 100706 |
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| names = 牧夫座4,HR 5185,HIP 67275,HD 120136,BD+18 2782,SAO 100706,FK5 507 |
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}} |
}} |
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{{Starbox reference |
{{Starbox reference |
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| Simbad = HD+120136 |
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| ARICNS = <!--Code--> |
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}} |
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{{starbox sources|HIP|CCDM|HR}} |
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{{Starbox reference |
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| Simbad =IDS+13425%2B1757 }} |
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{{Starbox end}} |
{{Starbox end}} |
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'''牧夫座τ''' (τ Boo,τ Boötis) 是在[[牧夫座]]內,距離地球大約51[[光年]]的一顆[[黃白色矮星]]。這個系統也是[[聯星]]系統,它的伴星是顆[[紅矮星]]。在1999年,確認主星有一顆[[系外行星]]環繞著。 |
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'''右攝提二'''('''牧夫座τ''','''τ Boo''')是[[牧夫座]]的一个双星系统,直径为1.04*10<sup>6</sup>km,视星等为4.51,距离地球约50[[光年]]。 |
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== 恆星的伴星 == |
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牧夫座τ由两颗恒星组成:GJ 527 B(CCDM J13473+1727 B)和[[牧夫座τ]](CCDM J13473+1727 A)。<ref>{{cite web|url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=CCDM%20J13473%2B1727%20B|title=GJ 527 B -- Star in double system |author=[[SIMBAD]]|accessdate=2011-06-23}}</ref><ref>{{cite web|url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=CCDM%20J13473%2B1727%20A|title=* tau Boo -- Variable Star |author=[[SIMBAD]]|accessdate=2011-06-23}}</ref> |
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這個系統是一對[[聯星]],主星勢一顆黃白色的[[主序星|矮星]] ([[光譜類型|光譜]]為F7V),伴星是顆昏暗的[[紅矮星]] (光譜為M2V)。相較之下,這個系統很接近地球,距離大約只有51[[光年]]。在足夠黑暗的場所,以裸眼就能很容易看見主星。 |
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牧夫座τ可能含有行星[[牧夫座4 b]]<ref>{{cite web|url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=*%20tau%20Boo%20b|title=* 4 Boo b -- Extra-solar Planet Candidate |author=[[SIMBAD]]| accessdate=2011-06-23}}</ref>。 |
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主星,'''牧夫座τA''',是黃白色的矮星,它的質量比我們的[[太陽]]略大約20%,所以比太陽熱,也比太陽亮。它的直徑是太陽的1.9倍,年齡大約13億歲。由於它的質量比太陽大,因此他的壽命較短,大約只能活60億歲。牧夫座τ是除了太陽之外,我們能觀察到磁場極性改變的第一顆恆星<ref name="Donati2008"/>,他也被懷疑是一顆[[變星]]。 |
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'''牧夫座τB''' (B是大寫,以與行星有所區別) 是顆暗淡的[[紅矮星]],在240[[天文單位]]的距離上圍繞著主星公轉,繞行一周需要花費數千年的時間。 |
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== 行星系統 == |
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在1996年發現一顆[[行星]]環繞著主星運轉,命名為[[牧夫座τ b]]<ref name="Butler1997"/>。也有一些跡象顯示還有一顆距離更遙遠的行星環繞著這顆恆星。在不尋常的角色逆轉情況下,它顯示牧夫座τ已經將牧夫座τ b[[潮汐鎖定]]<ref name="Walker2008"/>。這顆行星是由[[傑夫·瑪]]和[[R.保羅·巴特勒]]領導的團隊發現的<ref name="Butler1997"/>。 |
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{{OrbitboxPlanet begin |
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| name = 牧夫座τ A |
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| table_ref = <ref name="Butler2006"/> |
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}} |
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{{OrbitboxPlanet |
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| exoplanet = [[牧夫座τ b|b]] |
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| mass = >4.13 ± 0.34 |
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| period = 3.312463 ± 0.000014 |
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| semimajor = 0.0481 ± 0.028 |
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| eccentricity = 0.023 ± 0.015 |
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}} |
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{{Orbitbox end}} |
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== 參考資料 == |
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{{Reflist|colwidth=30em|refs= |
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<ref name="Butler1997">{{cite journal | url=http://iopscience.iop.org/1538-4357/474/2/L115/fulltext/ | title=Three New 51 Pegasi Type Planets | last1=Butler | first1=R. Paul | last2=Marcy | first2=Geoffrey W. | last3=Williams | first3=Eric | last4=Hauser | first4=Heather | last5=Shirts | first5=Phil | display-authors=1 | journal=The [[Astrophysical Journal]] Letters | year=1997 | volume=474 | issue=2 | pages=L115–L118 | doi=10.1086/310444 | bibcode=1997ApJ...474L.115B}}</ref> |
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<ref name="Butler2006">{{cite journal | url=http://www.iop.org/EJ/article/0004-637X/646/1/505/64046.html | title=Catalog of Nearby Exoplanets | journal=The Astrophysical Journal | volume=646 | issue=1 | pages=505–522 | year=2006 | doi=10.1086/504701 | last1=Butler | first1=R. P. | last2=Wright | first2=J. T. | last3=Marcy | first3=G. W. | last4=Fischer | first4=D. A. | last5=Vogt | first5=S. S. | last6=Tinney | first6=C. G. | last7=Jones | first7=H. R. A. | last8=Carter | first8=B. D. | last9=Johnson | first9=J. A. | display-authors=1 | bibcode=2006ApJ...646..505B | arxiv=astro-ph/0607493 }}</ref> |
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<ref name="Donati2008">{{cite journal | title=Magnetic cycles of the planet-hosting star Tau Boötis | last1=Donati | first1=J.-F. | last2=Moutou | first2=C. | last3=Farès | first3=R. | last4=Bohlender | first4=D. | last5=Catala | first5=C. | last6=Deleuil | first6=M. | last7=Shkolnik | first7=E. | last8=Cameron | first8=A. C. | last9=Jardine | first9=M. M. | display-authors=1 | date=12 February 2008 | journal=Monthly Notices of the Royal Astronomical Society | volume=385 | issue=3 | pages=1179–1185 | doi=10.1111/j.1365-2966.2008.12946.x | arxiv=0802.1584 | bibcode=2008MNRAS.385.1179D }}</ref> |
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<ref name="hipparcos">{{cite web | url=http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/311/hip2&recno=67047 | title=HIP 67275 | work=Hipparcos, the New Reduction | author=van Leeuwen, F. | year=2007 | accessdate=2009-12-08}}</ref> |
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<ref name="Mamajek2008">{{cite journal | title=Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics | url=http://iopscience.iop.org/0004-637X/687/2/1264/fulltext/ | last1=Mamajek | first1=Eric E. | last2=Hillenbrand | first2=Lynne A. | journal=The Astrophysical Journal | year=2008 | volume=687 | issue=2 | pages=1264–1293 | doi=10.1086/591785 | bibcode=2008ApJ...687.1264M |arxiv = 0807.1686 }}</ref> |
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<ref name="Walker2008">{{cite journal | title=MOST detects variability on tau Bootis possibly induced by its planetary companion | url=http://www.aanda.org/articles/aa/full/2008/17/aa8952-07/aa8952-07.html | last1=Walker | first1=G. A. H. | last2=Croll | first2=B. | last3=Matthews | first3=J. M. | last4=Kuschnig | first4=R. | last5=Huber | first5=D. | last6=Weiss | first6=W. W. | last7=Shkolnik | first7=E. | last8=Rucinski | first8=S. M. | last9=Guenther | first9=D. B. | display-authors=1 | year=2008 | journal=Astronomy and Astrophysics | volume=482 | issue=2 | pages=691–697 | doi=10.1051/0004-6361:20078952 | arxiv=0802.2732 | bibcode=2008A&A...482..691W }}</ref> |
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<ref name=aar17_3_251>{{citation | last1=Strassmeier | first1=Klaus G. | title=Starspots | journal=The Astronomy and Astrophysics Review | volume=17 | issue=3 | pages=251–308 | month=September | year=2009 | doi=10.1007/s00159-009-0020-6 | bibcode=2009A&ARv..17..251S }}</ref> |
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<ref name=aaa352_495>{{citation | last1=Mallik | first1=Sushma V. | title=Lithium abundance and mass | journal=Astronomy and Astrophysics | volume=352 | pages=495–507 | month=December | year=1999 | bibcode=1999A&A...352..495M }}</ref> |
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}} |
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== |
== 外部鏈結 == |
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* {{cite web |title=VizieR: HR 5185 |url=http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%205185 |work=[[Centre de Données astronomiques de Strasbourg]] |accessdate=2009-05-15 }} |
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{{Reflist}} |
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* {{cite web |title=VizieR: CCDM J13473+1727 |url=http://webviz.u-strasbg.fr/viz-bin/VizieR-S?CCDM%20J13473%2b1727A |work=Centre de Données astronomiques de Strasbourg |accessdate=2009-05-15 }} |
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* {{cite web |title=Aladin Previewer: Tau Boötis |url=http://aladin.u-strasbg.fr/AladinPreview?-c=NSV++6444&ident=NSV++6444&submit=Aladin+previewer |work=Centre de Données astronomiques de Strasbourg |accessdate=2009-05-15 }} |
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* {{cite web |last=Schirber |first=Michael |title=Role Reversal: Planet Controls a Star |url=http://www.space.com/scienceastronomy/050523_star_tide.html |work=SPACE.com |date=23 May 2005 |accessdate=2008-06-25 }} |
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* {{cite web |url=http://exoplanet.eu/star.php?st=Tau+Boo |title=Notes for star Tau Boo |accessdate=2008-06-25 |work=The Extrasolar Planets Encyclopaedia}} |
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* {{cite web |url=http://www.solstation.com/stars2/tau-boo2.htm |title=Tau Boötis 2 |accessdate=2008-06-25 |work=SolStation}} |
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* {{cite web |url=http://www.extrasolar.net/startour.asp?StarCatID=normal&StarID=9 |title=Tau Bootis |accessdate=2008-06-25 |work=Extrasolar Visions}} |
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* {{cite web |url=http://www.astro.uiuc.edu/~kaler/sow/tauboo.html |title=Tau Bootis |accessdate=2008-06-25 |work=The Planet Project}} |
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{{Sky|13|47|15.7|+|17|27|25|50.84}} |
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{{Nearest star systems|11}} |
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{{Stars of Boötes}} |
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{{DEFAULTSORT:Tau Bootis}} |
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[[Category:右摄提 (星官)]] |
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[[Category:牧夫座]] |
[[Category:拜耳天體|牧夫座τ]] |
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[[Category: |
[[Category:聯星]] |
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[[Category: 牧夫座]] |
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[[Category:佛氏天體|Bootis, 04]] |
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[[Category:HD天體|120136]] |
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[[Category:依巴谷天體|067275]] |
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[[Category:HR天體|5185]] |
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[[Category: GJ天體|0527]] |
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[[Category:Durchmusterung objects|BD+18 02782]] |
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[[Category:M-型主序星]] |
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[[Category:F-型主序星]] |
2013年4月7日 (日) 10:16的版本
在星圖上呈現的牧夫座,以圓圈標示出牧夫座τ的位置。 | |
觀測資料 曆元 J2000.0 | |
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星座 | 牧夫座 |
星官 | 左攝提 (亢宿 |
赤經 | 13h 47m 15.74s [1] |
赤緯 | +17° 27′ 24.9″ [1] |
視星等(V) | 4.50[2] |
特性 | |
光谱分类 | F6 IV[2] |
U−B 色指数 | 0.04 |
B−V 色指数 | 0.48[2] |
R−I 色指数 | 0.24 |
变星类型 | 變星 |
天体测定 | |
徑向速度 (Rv) | -15.6 km/s |
自行 (μ) | 赤经:-479.53 ± 0.16 [1] mas/yr 赤纬:53.49 ± 0.13 [1] mas/yr |
视差 (π) | 64.03 ± 0.19[1] mas |
距离 | 50.9 ± 0.2 ly (15.62 ± 0.05 pc) |
绝对星等 (MV) | 3.53 |
詳細資料 | |
質量 | 1.3 / 0.4 M☉ |
半徑 | 1.331 ± 0,027 R☉ |
表面重力 (log g) | 4.30[2] |
亮度 | 3.0[2] L☉ |
溫度 | 6,360[3] K |
金屬量 | 210%[來源請求] |
自轉 | 3.31 days[3] |
自轉速度 (v sin i) | 14 km/s |
年齡 | 1.6–2.3 [4] Gyr |
其他命名 | |
參考資料庫 | |
SIMBAD | 资料 |
资料来源: | |
依巴谷星表、CCDM (2002)、亮星星表 | |
參考資料庫 | |
SIMBAD | 资料 |
牧夫座τ (τ Boo,τ Boötis) 是在牧夫座內,距離地球大約51光年的一顆黃白色矮星。這個系統也是聯星系統,它的伴星是顆紅矮星。在1999年,確認主星有一顆系外行星環繞著。
恆星的伴星
這個系統是一對聯星,主星勢一顆黃白色的矮星 (光譜為F7V),伴星是顆昏暗的紅矮星 (光譜為M2V)。相較之下,這個系統很接近地球,距離大約只有51光年。在足夠黑暗的場所,以裸眼就能很容易看見主星。
主星,牧夫座τA,是黃白色的矮星,它的質量比我們的太陽略大約20%,所以比太陽熱,也比太陽亮。它的直徑是太陽的1.9倍,年齡大約13億歲。由於它的質量比太陽大,因此他的壽命較短,大約只能活60億歲。牧夫座τ是除了太陽之外,我們能觀察到磁場極性改變的第一顆恆星[5],他也被懷疑是一顆變星。
牧夫座τB (B是大寫,以與行星有所區別) 是顆暗淡的紅矮星,在240天文單位的距離上圍繞著主星公轉,繞行一周需要花費數千年的時間。
行星系統
在1996年發現一顆行星環繞著主星運轉,命名為牧夫座τ b[6]。也有一些跡象顯示還有一顆距離更遙遠的行星環繞著這顆恆星。在不尋常的角色逆轉情況下,它顯示牧夫座τ已經將牧夫座τ b潮汐鎖定[7]。這顆行星是由傑夫·瑪和R.保羅·巴特勒領導的團隊發現的[6]。
成員 (依恆星距離) |
质量 | 半長軸 (AU) |
轨道周期 (天) |
離心率 | 傾角 | 半径 |
---|---|---|---|---|---|---|
b | >4.13 ± 0.34 MJ | 0.0481 ± 0.028 | 3.312463 ± 0.000014 | 0.023 ± 0.015 | — | — |
參考資料
- ^ 1.0 1.1 1.2 1.3 1.4 van Leeuwen, F. HIP 67275. Hipparcos, the New Reduction. 2007 [2009-12-08].
- ^ 2.0 2.1 2.2 2.3 2.4 Mallik, Sushma V., Lithium abundance and mass, Astronomy and Astrophysics, 1999, 352: 495–507, Bibcode:1999A&A...352..495M 已忽略未知参数
|month=
(建议使用|date=
) (帮助) - ^ 3.0 3.1 Strassmeier, Klaus G., Starspots, The Astronomy and Astrophysics Review, 2009, 17 (3): 251–308, Bibcode:2009A&ARv..17..251S, doi:10.1007/s00159-009-0020-6 已忽略未知参数
|month=
(建议使用|date=
) (帮助) - ^ Mamajek, Eric E.; Hillenbrand, Lynne A. Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics. The Astrophysical Journal. 2008, 687 (2): 1264–1293. Bibcode:2008ApJ...687.1264M. arXiv:0807.1686 . doi:10.1086/591785.
- ^ Donati, J.-F.; et al. Magnetic cycles of the planet-hosting star Tau Boötis. Monthly Notices of the Royal Astronomical Society. 12 February 2008, 385 (3): 1179–1185. Bibcode:2008MNRAS.385.1179D. arXiv:0802.1584 . doi:10.1111/j.1365-2966.2008.12946.x.
- ^ 6.0 6.1 Butler, R. Paul; et al. Three New 51 Pegasi Type Planets. The Astrophysical Journal Letters. 1997, 474 (2): L115–L118. Bibcode:1997ApJ...474L.115B. doi:10.1086/310444.
- ^ Walker, G. A. H.; et al. MOST detects variability on tau Bootis possibly induced by its planetary companion. Astronomy and Astrophysics. 2008, 482 (2): 691–697. Bibcode:2008A&A...482..691W. arXiv:0802.2732 . doi:10.1051/0004-6361:20078952.
- ^ Butler, R. P.; et al. Catalog of Nearby Exoplanets. The Astrophysical Journal. 2006, 646 (1): 505–522. Bibcode:2006ApJ...646..505B. arXiv:astro-ph/0607493 . doi:10.1086/504701.
外部鏈結
- VizieR: HR 5185. Centre de Données astronomiques de Strasbourg. [2009-05-15].
- VizieR: CCDM J13473+1727. Centre de Données astronomiques de Strasbourg. [2009-05-15].
- Aladin Previewer: Tau Boötis. Centre de Données astronomiques de Strasbourg. [2009-05-15].
- Schirber, Michael. Role Reversal: Planet Controls a Star. SPACE.com. 23 May 2005 [2008-06-25].
- Notes for star Tau Boo. The Extrasolar Planets Encyclopaedia. [2008-06-25].
- Tau Boötis 2. SolStation. [2008-06-25].
- Tau Bootis. Extrasolar Visions. [2008-06-25].
- Tau Bootis. The Planet Project. [2008-06-25].
天球赤道座標: 13h 47m 15.7s,+17° 27′ 25″ Template:Star systems within 50 – 55 light-years
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