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NGC 7793 - 版本历史
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<p><b>新页面</b></p><div>{{Infobox galaxy<br />
| name = [[NGC天體表|NGC]] 7793<br />
| image = [[Image:NGC 7793SpitzerFull.jpg|250px]]<br />
| caption = NGC 7793是[[史匹哲太空望遠鏡]]的[[史匹哲紅外鄰近星系巡天]]觀測的目標之一。藍色是來自恆星的3.6微米輻射；綠色和紅色是來自[[多環芳烴]]和可能是塵埃的5.8和8.0微米輻射。<br />
| epoch = [[J2000]]<br />
| type = SA(s)d<ref name="ned">{{cite web<br />
| title=NASA/IPAC Extragalactic Database<br />
| work=Results for NGC 7793<br />
| url=http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+7793&img_stamp=yes&extend=no<br />
| accessdate=2006-11-21<br />
| archive-date=2019-10-18<br />
| archive-url=https://web.archive.org/web/20191018194258/http://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+7793&img_stamp=yes&extend=no<br />
| dead-url=no<br />
}}</ref><br />
| ra = {{RA|23|57|49.8}}<ref name="ned" /><br />
| dec = {{DEC|-32|35|28}}<ref name="ned" /><br />
| dist_ly = [[1 E22 m|12.7 ± 1.3]] [[光年|百万光年]] (3.9 ± 0.4 [[秒差距|百万秒差距]])<ref name="karachentsevetal2003" /><ref name="karachentsevetal2004">{{cite journal<br />
| author=I. D. Karachentsev, V. E. Karachentseva, W. K. Hutchmeier, D. I. Makarov<br />
| title=A Catalog of Neighboring Galaxies<br />
| url=https://archive.org/details/sim_astronomical-journal_2004-04_127_4/page/2031<br />
| journal=Astronomical Journal<br />
| year=2004<br />
| volume=127<br />
| issue=4<br />
| pages=2031–2068<br />
| bibcode=2004AJ....127.2031K<br />
| doi=10.1086/382905}}</ref><ref name="Karachentsevetal2006">{{cite journal<br />
| author=Karachentsev, I. D.; Kashibadze, O. G.<br />
| title=Masses of the local group and of the M81 group estimated from distortions in the local velocity field<br />
| journal=Astrophysics<br />
| year=2006<br />
| volume=49<br />
| issue=1<br />
| pages=3–18<br />
| bibcode=2006Ap.....49....3K<br />
| doi=10.1007/s10511-006-0002-6 }}</ref><br />
| z = 227 ± 2 km/[[second|s]]<ref name="ned" /><br />
| appmag_v = 10.0<ref name="ned" /><br />
| size_v = 9′.3 × 6′.3<ref name="ned" /><br />
| constellation name = [[玉夫座]]<br />
| names = [[Principal Galaxies Catalogue|PGC]] 73049<ref name="ned" /><br />
}}<br />
<br />
[[Image:Phot-14b-09-fullres 2.JPG|thumb|right|250px|形象渾沌的螺旋星系NGC 7793]]<br />
<br />
'''NGC 7793'''是在[[玉夫座]]的一個[[螺旋星系]]，距離大約1270萬[[光年]]，是[[James Dunlop]]在1826年發現的<ref>{{cite journal | author = Dunlop James | year = 1828 | title = A Catalogue of Nebulae and Clusters of Stars in the Southern Hemisphere observed in New South Wales | url = | journal = Philosophical Transactions of the Royal Society | volume = 118 | issue = | pages = 113–151 | bibcode = 1828RSPT..118..113D | jstor=107841 | doi = 10.1098/rstl.1828.0010}}</ref>。<br />
<br />
== 星系群的資料 ==<br />
NGC 7793是[[玉夫座星系群]]，與[[玉夫座]]有相同名稱的[[星系群]]，中最明亮的星系之一。這個集團本身是瘦長且鬆散的，以[[玉夫座星系]]（NGC 253）為中心，和鄰近的星系形成一個緊密綁定的星系群核心<ref name="karachentsevetal2003">{{cite journal<br />
| author=I. D. Karachentsev, E. K. Grebel, M. E. Sharina, A. E. Dolphin, D. Geisler, P. Guhathakrta, P. W. Hodge, V. E. Karachentseva, A. Sarajedini, P. Seitzer<br />
| title=Distances to nearby galaxies in Sculptor<br />
| journal=Astronomy and Astrophysics<br />
| year=2003<br />
| volume=404<br />
| issue=1<br />
| pages=93–111<br />
| bibcode=2003A&A...404...93K<br />
| doi=10.1051/0004-6361:20030170|arxiv = astro-ph/0302045 }}</ref>。<br />
<br />
== 超新星2008bk ==<br />
在2008年3月25日，在NGC 7793發現[[超新星|SN]] 2008bk<ref name="SN2008bk">{{cite web<br />
|title=Supernova 2008bk in NGC 7793<br />
|publisher=supernovae.net (International Supernovae Network)<br />
|author=David Bishop<br />
|url=http://www.supernovae.net/sn2008/#2008bk<br />
|accessdate=2010-06-07<br />
|deadurl=yes<br />
|archiveurl=https://web.archive.org/web/20110927114352/http://www.supernovae.net/sn2008/#2008bk<br />
|archivedate=2011-09-27<br />
}}</ref>，[[視星等]]12.5等，是2008年第二亮的超新星<ref name="supernovae2008">{{cite web<br />
|title=Bright Supernovae - 2008<br />
|publisher=supernovae.net (International Supernovae Network)<br />
|author=David Bishop<br />
|url=http://www.supernovae.net/sn2008/<br />
|accessdate=2010-06-07<br />
|deadurl=yes<br />
|archiveurl=https://web.archive.org/web/20110927114352/http://www.supernovae.net/sn2008/<br />
|archivedate=2011-09-27<br />
}}</ref>。<br />
<br />
=== 在外側旋臂的黑洞 ===<br />
在這個星系外側的旋臂有一個如同太陽般大小的黑洞，有著壯觀的噴流<ref>{{Cite web |url=http://io9.com/5582028/black-hole-emitting-a-giant-gas-bubble-1000-light+years-wide |title=Black hole emitting a giant gas bubble 1000 light-years wide |accessdate=2014-03-18 |archive-date=2014-02-26 |archive-url=https://web.archive.org/web/20140226140842/http://io9.com/5582028/black-hole-emitting-a-giant-gas-bubble-1000-light+years-wide |dead-url=no }}</ref>。<br />
<br />
== 相關條目 ==<br />
<br />
* [[NGC 300]] - ''鄰近NGC 7793的一個類似的螺旋星系''<br />
* [[NGC 2403]] - ''一個類似的螺旋星系''<br />
<br />
== 參考資料 ==<br />
{{Reflist}}<br />
<br />
== 外部連結 ==<br />
{{commons category}}<br />
* [https://web.archive.org/web/20060220061436/http://www.spitzer.caltech.edu/Media/mediaimages/sig/sig05-017.shtml '''SST''': NGC 7793]<br />
{{Ngc80}}<br />
{{DEFAULTSORT:NGC 7793}}<br />
[[Category:螺旋星系]]<br />
[[Category:無棒螺旋星系]]<br />
[[Category:玉夫座星系群]]<br />
[[Category:玉夫座]]<br />
[[Category:NGC天體|7793]]<br />
[[Category:PGC天體|73049]]</div>
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