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{{Infobox Galaxy
| name = [[星雲和星團新總表|NGC]] 4945
| image = [[Image:Spiral Galaxy NGC 4945.jpg|320px]]
| epoch = [[J2000]]
| type = SB(s)cd<ref name="ned">{{cite web
| title=NASA/IPAC Extragalactic Database
| work=Results for NGC 4945
| url=http://nedwww.ipac.caltech.edu/
| accessdate=2006-11-25
| archive-date=2011-05-14
| archive-url=https://web.archive.org/web/20110514100451/http://nedwww.ipac.caltech.edu/
| dead-url=no
}}</ref>
| ra = {{RA|13|05|27.5}}<ref name="ned" />
| dec = {{DEC|-49|28|06}}<ref name="ned" />
| dist_ly = 11,70萬[[光年]] (3,60萬[[秒差距]])<ref name="karachentsevetal2002" />
| z = 563 ± 3 公里/秒<ref name="ned" />
| appmag_v = 8.4<ref name="spider">{{lien web |langue=fr| titre=Les données de «Revised NGC and IC Catalog by Wolfgang Steinicke» sur le site ProfWeb, NGC 4900 à 4999 |url = http://dpelletier.profweb.ca/AstronomieCompl/NGC%20et%20autres/WolfgangS/N4900_exc_web.htm }}</ref> <br /> 9.3 在[[UBV测光系统|B波段]] <ref name="spider"/>
| size_v = 20′.0 × 3′.8<ref name="ned" />
| constellation name = [[半人馬座]]
| names = [[Principal Galaxies Catalogue|PGC]] 45279<ref name="ned" />, [[科德韋爾深空天體表|科德韋爾]]83
}}
{{Sky|13|05|27.5|-|49|28|06|100000000}}

'''NGC 4945'''是位於[[半人馬座]]的一個[[螺旋星系]]。它是[[詹姆士·丹露帕]]在1826年發現的<ref>{{Cite web |url=http://www.sciencedaily.com/releases/2009/09/090902112111.htm |title=存档副本 |accessdate=2011-01-27 |archive-date=2017-12-01 |archive-url=https://web.archive.org/web/20171201134444/https://www.sciencedaily.com/releases/2009/09/090902112111.htm |dead-url=no }}</ref>。它属于[[棒旋星系]]，被認為结构上與[[銀河系]]非常相似，但是X射線的觀察顯示NGC 4945很不尋常，是一個精力充沛的[[西佛星系|西佛]]2型核心，這意味著它的中心可能有一個巨大的[[黑洞]]。

[[File:ESO-NGC 4945.jpg|thumb|alt=The spiral galaxy NGC 4945, a close neighbour of the Milky Way.| [[螺旋星系]]NGC 4945，是[[銀河系]]的近鄰。]]

== 星系群的資訊 ==
NGC 4945是鄰近地球的[[星系群]]，[[半人馬座 A/M83星系團]]中最大的星系之一。這個星系是以[[半人馬座A]]為中心的子群中第二亮的星系<ref name="karachentsevetal2002">{{cite journal
| author=I. D. Karachentsev, M. E. Sharina, A. E. Dolphin, E. K. Grebel, D. Geisler, P. Guhathakurta, P. W. Hodge, V. E. Karachentseva, A. Sarajedini, P. Seitzer
| title=New distances to galaxies in the Centaurus A group
| journal=Astronomy and Astrophysics
| year=2002
| volume=385
| pages=21–31
| url=http://adsabs.harvard.edu/abs/2002A&A...385...21K
| doi=10.1051/0004-6361:20020042
| access-date=2020-09-26
| archive-date=2018-11-22
| archive-url=https://web.archive.org/web/20181122173410/http://adsabs.harvard.edu/abs/2002A%26A...385...21K
| dead-url=no
}}</ref><ref name="karachentsev2005">{{cite journal
| author=I. D. Karachentsev
| title=The Local Group and Other Neighboring Galaxy Groups
| journal=Astronomical Journal
| year=2005
| volume=129
| pages=178–188
| url=http://adsabs.harvard.edu/abs/2005AJ....129..178K
| doi=10.1086/426368
| access-date=2011-01-27
| archive-date=2008-02-21
| archive-url=https://web.archive.org/web/20080221004030/http://adsabs.harvard.edu/abs/2005AJ....129..178K
| dead-url=no
}}</ref>。

== 參考資料 ==
{{reflist}}

== 外部連結 ==
* {{commonscat-inline}}
* [http://antwrp.gsfc.nasa.gov/apod/ap020721.html '''APOD''': Nearby Spiral Galaxy NGC 4945 (7/21/02)]{{Wayback|url=http://antwrp.gsfc.nasa.gov/apod/ap020721.html |date=20060115012514 }}
* [https://web.archive.org/web/20090905065640/http://www.eso.org/public/outreach/press-rel/pr-2009/pr-31-09.html'''ESO''': The milkyway's nearby cousin (2/10/09)]
* [https://web.archive.org/web/20090513010932/http://www.dsi-astronomie.de/NGC4945.html NGC4945]

{{科德韋爾天體}}

{{Authority control}}
[[Category:棒旋星系]]
[[Category:半人馬座 A/M83星系團]]
[[Category:半人馬座]]
[[Category:NGC天體|4945]]
[[Category:PGC天體|45279]]
[[Category:科德韋爾天體|083b]]

NGC 4945 - 版本历史

imported>空间的拓荒者 来自 2023年10月30日 (一) 16:08

imported>空间的拓荒者来自 2023年10月30日 (一) 16:08