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{{Starbox begin
|name=[http://simbad.u-strasbg.fr/simbad/sim-id?Ident=GD%20362 GD 362]
}}
{{Starbox observe
|epoch=[[J2000.0]] ([[国际天球参考系统|ICRS]])
|constell=[[武仙座]]<ref>[http://vizier.u-strasbg.fr/vizier/VizieR/constellations.htx Constellation boundaries] {{Wayback|url=http://vizier.u-strasbg.fr/vizier/VizieR/constellations.htx |date=20190717180728 }}, [[斯特拉斯堡天文数据中心|CDS]]. Accessed on line October 4, 2007.</ref>
|ra={{RA|17|31|34.33}}<ref name="revl" />
|dec={{DEC|+37|05|20.6}}<ref name="revl" />
|appmag_v=16.23<ref name="revl">[http://adsabs.harvard.edu/abs/2003ApJ...582.1011S Improved Astrometry and Photometry for the Luyten Catalog. II. Faint Stars and the Revised Catalog] {{Wayback|url=http://adsabs.harvard.edu/abs/2003ApJ...582.1011S |date=20140703080402 }}, Samir Salim and Andrew Gould, ''Astrophysical Journal'' '''582''', #2 (January 2003), pp. 1011–1031; [[斯特拉斯堡天文数据中心|CDS]] ID [http://vizier.u-strasbg.fr/viz-bin/Cat?J/ApJ/582/1011 J/ApJ/582/1011] {{Wayback|url=http://vizier.u-strasbg.fr/viz-bin/Cat?J%2FApJ%2F582%2F1011 |date=20140703080402 }}. Entry for NLTT 44986. Accessed on line October 4, 2007.</ref>
}}
{{Starbox character
| b-v=0.2<ref name="metalrich">[http://adsabs.harvard.edu/abs/2004ApJ...617L..57G Discovery of a Cool, Massive, and Metal-rich DAZ White Dwarf] {{Wayback|url=http://adsabs.harvard.edu/abs/2004ApJ...617L..57G |date=20170621051943 }}, A. Gianninas, P. Dufour, and P. Bergeron, ''The Astrophysical Journal'' '''617''', #1 (December 2004), pp. L57–L60.</ref>
}}
{{Starbox astrometry
| prop_mo_ra=27<ref name="revl" />
| prop_mo_dec=-223<ref name="revl" />
| dist_pc=~50<ref name="Reuters" />
| dist_ly=~150<ref name="Reuters" />
}}
{{Starbox detail
|mass=0.73±0.02<ref name="Zuckerman07" />
|gravity=8.24±0.04<ref name="Zuckerman07" />
|temperature=10540±200<ref name="Zuckerman07" />
}}
{{Starbox catalog
| names=G 204-14, NLTT 44986, WD 1729+371, EGGR 545, 2MASS J17313433+3705209, PG 1729+371<ref name="simbad">[[SIMBAD]]. [http://simbad.u-strasbg.fr/simbad/sim-id?Ident=GD%20362 Entry for GD 362] {{Wayback|url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=GD%20362 |date=20160304225559 }}. Accessed on line October 4, 2007.</ref>
}}
{{Starbox end}}

'''GD 362'''是一顆距離地球約150光年的[[白矮星]]，位於[[武仙座]]<ref name="Reuters" />。

==研究==
2004年對GD 362的[[光譜]]觀測顯示和其他白矮星相較，有相對較豐富的[[金屬量|金屬]]存在於它的大氣層中。因為白矮星的強大[[重力場]]可以使重元素快速移動到大氣層底部，這代表它的大氣曾被外來的金屬來源汙染<ref name="metalrich" />。2005年[[紅外線]][[測光 (天文學)|測光]]觀測結果顯示有一個體積相當於[[土星環]]的塵埃環存在於該白矮星周圍，解釋了大氣層金屬汙染來源<ref>[http://adsabs.harvard.edu/abs/2005ApJ...632L.119B A Dusty Disk around GD 362, a White Dwarf with a Uniquely High Photospheric Metal Abundance] {{Wayback|url=http://adsabs.harvard.edu/abs/2005ApJ...632L.119B |date=20190722103525 }}, E.E. Becklin, J. Farihi, M. Jura, Inseok Song, A. J. Weinberger, and B. Zuckerman, ''The Astrophysical Journal'' '''632''', #2 (October 2005), pp. L119–L122.</ref>。

2006年時[[班傑明·朱克曼]]、[[麥可·朱拉]]等天文學家使用[[凱克望遠鏡]]獲得了GD 362的高解析度[[電磁波譜]]影像，發現大氣層內的重元素聚集模式類似地球－月球系統<ref name="Zuckerman07" />。該團隊的結論認為GD 362的塵埃環和大氣層汙染是因為一顆直徑約200公里的岩石小行星在10萬到100萬年前因為[[潮汐力]]而被粉碎。如果是這樣的話，光譜將會顯示這顆小行星的成分將類似地球的[[地殼]]，並顯示它在形成[[紅巨星]]以前周圍有一顆類地球行星存在<ref name="Reuters">{{cite news| url=http://www.reuters.com/article/scienceNews/idUSN1636758720070816| title=Burned-out star harbors signs of Earthlike planets| date=2007-08-16| publisher=Reuters| first=Will| last=Dunham| accessdate=2007-08-17| archive-date=2007-08-23| archive-url=https://web.archive.org/web/20070823175716/http://www.reuters.com/article/scienceNews/idUSN1636758720070816| dead-url=no}}</ref><ref name="Zuckerman07">{{cite journal | url=http://www.iop.org/EJ/article/0004-637X/671/1/872/72207.html | author=Zuckerman ''et al.'' | title=The Chemical Composition of an Extrasolar Minor Planet | journal=The [[天文物理期刊|Astrophysical Journal]] | volume=671 | issue=1 | year=2007 | pages=872–877 | doi=10.1086/522223 | bibcode=2007ApJ...671..872Z|arxiv = 0708.0198 }}</ref><ref>{{cite web| url=http://www.scientificblogging.com/news/gd_362_harbors_signs_of_earthlike_planet| title=GD 362 Shows Signs It Had An Earthlike Planet| publisher=Scientificblogging.com| accessdate=2007-08-17| date=2007-08-16| deadurl=yes| archiveurl=https://archive.today/20130202084814/http://www.scientificblogging.com/news/gd_362_harbors_signs_of_earthlike_planet| archivedate=2013-02-02}}</ref>。

GD 362大約在9億年成為白矮星<ref name="jumk">{{cite web| url=http://jumk.de/astronomie/exoplanets/gd-362.shtml| title=Stars with Exoplanets: GD 362| accessdate=2007-08-17| archive-date=2007-09-27| archive-url=https://web.archive.org/web/20070927235845/http://jumk.de/astronomie/exoplanets/gd-362.shtml| dead-url=no}}</ref>。

==參考資料==
{{Reflist}}

==外部連結==
* Universe Today, [http://www.universetoday.com/2007/08/17/dead-star-found-polluted-by-earthlike-planet/ Dead Star Found Polluted By Earthlike Planet]{{Wayback|url=http://www.universetoday.com/2007/08/17/dead-star-found-polluted-by-earthlike-planet/ |date=20090215155944 }}
* Astronomy Now, [http://www.astronomynow.com/090519Doomedplanetmayhavebeendrenchedinwater.html Doomed planet may have been drenched in water]{{Wayback|url=http://www.astronomynow.com/090519Doomedplanetmayhavebeendrenchedinwater.html |date=20131006214453 }}

{{DEFAULTSORT:GD 362}}
[[Category:白矮星]]
[[Category:武仙座]]
[[Category:星周盤]]

GD 362 - 版本历史

imported>InternetArchiveBot：​Reformat 1 URL (Wayback Medic 2.5)) #IABot (v2.0.9.5) (GreenC bot

imported>InternetArchiveBot：Reformat 1 URL (Wayback Medic 2.5)) #IABot (v2.0.9.5) (GreenC bot