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HD 95086 b - 版本历史
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<p><b>新页面</b></p><div>{{Planetbox begin<br />
| name = HD 95086 b<br />
}}<br />
{{Planetbox image<br />
| image = VLT image of exoplanet HD 95086 b.jpg<br />
| caption = 甚大望远镜紅外線影像中的HD 95086 b（左下角<br>淺藍色點），藍色圓圈是[[海王星]]軌道範圍。<br />
}}<br />
{{Planetbox star<br />
| star = {{le|HD 95086}}<br />
| ra= {{RA|10|57|03}}<br />
| dec= {{DEC|-68|40|02}}<br />
| constell=[[船底座]]<br />
| app_mag = 7.36<br />
| dist_ly = 296 ± 11<br />
| dist_pc = 90.4 ± 3.3<br />
| class = A8III<br />
| mass = 1.6<br />
| radius = <br />
| temperature = <br />
| age=17{{±|3|3}} million}}<br />
{{Planetbox orbit<br />
| semimajor = 56<br />
| semimajor_gm = <br />
| semimajor_mas = <br />
| periastron = <br />
| periastron_gm = <br />
| apastron = <br />
| apastron_gm = <br />
| eccentricity = <br />
| period = <br />
| inclination = <br />
| node = <!--longitude of the node, in degrees--><br />
| period_year = <br />
| arg_peri = <br />
| t_peri = <br />
| semi-amp = <br />
}}<br />
{{Planetbox character<br />
| mass = 5.0 ± 0.5<br />
| temperature = 1000 ± 100<br />
| gravity = 3.85 ± 0.5<br />
| radius = <br />
| density = <br />
}}<br />
{{Planetbox discovery<br />
| discovery_date = 2013年6月3日新聞稿公布<br />
| discoverers = 儒利安·拉莫等人<br />
| discovery_method = 直接攝影法<br />
| discovery_site = {{CHL}}[[甚大望远镜]]<br />
| discovery_status = 初步宣布<br />
}}<br />
{{Planetbox catalog<br />
| names = <br />
}}<br />
{{Planetbox reference<br />
| star=HD+95086<br />
| planet=b<br />
}}<br />
{{Planetbox end}}<br />
<br />
'''HD 95086 b'''是一顆年齡介乎1,000至1,700萬年的[[太陽系外行星]]<ref>{{cite web | url=http://iopscience.iop.org/1538-3881/124/3/1670 | title=Post-T Tauri Stars in the Nearest OB Association | accessdate=2002-05-20 | author=Eric E. Mamajek | archive-date=2020-03-21 | archive-url=https://web.archive.org/web/20200321014600/http://validate.perfdrive.com/captcha?ssa=a5dde517-f05f-4c38-95a6-2453182d6f28&ssb=gz110hd6ilbh3p64keliia6lf&ssc=http%3A%2F%2Fiopscience.iop.org%2F1538-3881%2F124%2F3%2F1670%2F&ssd=762737798307649&sse=bmjkcfmbcplljni&ssf=daac4d708fbb4c00ad2e73884d65250ba967f370&ssg=1ea95330-efdf-4f1f-94a4-65c1227f61fd&ssh=0028cab0-f1a8-4070-99be-8736465f4f19&ssi=9bf08c38-8427-4ce9-8385-f229bc2e9554&ssj=f9a4ac76-88dd-4b2a-bd80-ba93736f1caf&ssk=support%40shieldsquare.com&ssl=836528440840&ssm=75339058211670552102098191349410&ssn=38194d6d76222e91a8055f98a2815acf863f51d96547-db38-456e-9a2206&sso=224fe5c1-927f6af689f57bdb57d38336c2731124343c6475178e1122&ssp=89344965181584771635158477239530195&ssq=65201915516085512720855160547323330130138&ssr=MjA3LjI0MS4yMzIuMzU%3D&sss=Mozilla%2F4.0%20%28Windows%20NT%205.1%29%20AppleWebKit%2F535.7%20%28KHTML%2Clike%20zeco%29%20Chrome%2F33.0.1750.154%20Safari%2F536.7&sst=Mozilla%2F5.0%20%28Windows%20NT%2010.0%3B%20Win64%3B%20x64%29%20AppleWebKit%2F537.36%20%28KHTML%2C%20like%20Gecko%29%20Chrome%2F74.0.3729.169%20Safari%2F537.36&ssu=Mozilla%2F4.0%20%28compatible%3B%20MSIE%208.0%3B%20Windows%20NT%206.1%29%20Gecko%2F20100101%20Firefox%2F39.0&ssv=%409mr9lm3p94sqon&ssw=&ssx=469826817760303&ssy=ghjdje%40gkblkmlcblmomh%40fidblickfifbehjhik&ssz=dd1311644f6dccd | dead-url=no }}</ref>，母恆星是位於[[船底座]]的[[恆星光譜|A型]]主序前星{{le|HD 95086}}，距離地球90秒差距（296光年）。該行星發現至今可能是直接攝影法發現的系外行星中質量最低的。<br />
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==概要==<br />
HD 95086 b的質量大約是[[木星]]的5倍，軌道半長軸56天文單位。天文學家使用甚大望遠鏡的 NACO 儀器以直接攝影的方式在紅外線波段影像中發現了該行星<ref>{{cite web | url=http://arxiv.org/abs/1305.7428 | title=Discovery of a probable 4-5 Jupiter-mass exoplanet to HD 95086 by direct-imaging | accessdate=2013-06-06 | author=Rameau, J | archive-date=2013-10-19 | archive-url=https://web.archive.org/web/20131019185617/http://arxiv.org/abs/1305.7428 | dead-url=no }}</ref>。天文學家在這個行星系統周圍以次毫米波的波段發現了[[岩屑盤]]，但在影像中並未被解析出。HD 95086 b在天球上和母恆星距離623.9 ± 7.4毫角秒，方位角151.8 ± 0.8°。該行星目前只是初步被偵測到，目前仍需要更高的[[信噪比]]資料或使用不同的儀器觀測確認後才能真正證實其存在。<br />
<br />
HD 95086 b的母恆星很可能是[[天蠍-半人馬星協|下半人馬－南十字恆星形成區域]]的成員星<ref>{{cite web | url=http://iopscience.iop.org/1538-3881/117/1/354/fulltext/980283.text.html | title=A Hipparcos census of the nearby OB associations| accessdate=1998-09-14 | author=P. T. De Zeeuw}}</ref>。母恆星HD 95086的質量是太陽的1.6倍，使其光譜為晚期A型星<ref>{{cite web | url=http://cds.aanda.org/index.php?option=com_article&access=bibcode&bibcode=2007A%252526A...474..653V | title=Validation of the new Hipparcos reduction | accessdate=2007-08-08 | author=F. van Leeuwen | archive-url=https://web.archive.org/web/20131101195817/http://cds.aanda.org/index.php?option=com_article&access=bibcode&bibcode=2007A%252526A...474..653V | archive-date=2013-11-01 | dead-url=yes }}</ref>。<br />
<br />
HD 95086 b是一顆軌道半徑極大的巨大行星，因此該行星可能在距離母恆星極近的地方形成，之後因為和其他環繞母恆星的天體重力交互作用而向外[[行星遷移|遷移]]。在岩屑盤中，這些天體可能是其他行星或[[微行星]]。相關散射機制已在過密流體單元的狀況，例如擁有行星的[[原行星盤]]中被確認<ref name="cloutier">{{cite journal | author=R. Cloutier, M-K. Lin | title=Orbital migration of giant planets induced by gravitationally unstable gaps: the effect of planet mass | journal=arXiv | arxiv=1306.2514 | year=2013 | bibcode=2013arXiv1306.2514C}}</ref>。行星盤內的散射機制也許可以解釋軌道半徑極大的大質量行星形成原因。<br />
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==參考資料==<br />
{{reflist}}<br />
<br />
==外部連結==<br />
*[http://exoplanet.eu/catalog/hd_95086_b/ The Extrasolar Planet Encyclopaedia — HD 95086 b]{{Wayback|url=http://exoplanet.eu/catalog/hd_95086_b/ |date=20130613043939 }}<br />
*[http://www.eso.org/public/news/eso1324/ Lightest Exoplanet Imaged So Far?]{{Wayback|url=http://www.eso.org/public/news/eso1324/ |date=20130623095143 }}<br />
<br />
[[Category:2013年發現的系外行星]]<br />
[[Category:直接影像法发现的系外行星]]<br />
[[Category:類木行星]]<br />
[[Category:船底座]]</div>
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