2025年4月3日 (四) 00:45 imported>Hikaru Genji

2025-04-03T00:45:36Z

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{{Infobox Galaxy
| name = [[星雲和星團新總表|NGC]] 4725
| image = [[Image:NGC 4725.jpg|350px]]
|caption = [[史匹哲太空望遠鏡]] (SST)拍攝的NGC 4725的[[紅外線|中紅外線]]影像。<br/>創建者：[[Spitzer Infrared Nearby Galaxies Survey]]/SST/[[NASA]].
| constellation name = [[后髮座]]<ref name="sinnott1988">{{cite book
| author=R. W. Sinnott, editor
| title= The Complete New General Catalogue and Index Catalogue of Nebulae and Star Clusters by J. L. E. Dreyer
| url=https://archive.org/details/ngc20000complete0000drey
| year=1988
| publisher=Sky Publishing Corporation and Cambridge University Press
| isbn=0-933-34651-4}}</ref>
| epoch = [[J2000]]
| type = SAB(r)ab pec<ref>{{cite web
| title=NASA/IPAC Extragalactic Database
| work=Results for NGC 4725
| url=http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+4725&extend=no&hconst=73&omegam=0.27&omegav=0.73&corr_z=1&out_csys=Equatorial&out_equinox=J2000.0&obj_sort=RA+or+Longitude&of=pre_text&zv_breaker=30000.0&list_limit=5&img_stamp=YES
| accessdate=2010-04-21
| archive-date=2020-01-04
| archive-url=https://web.archive.org/web/20200104003539/http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+4725&extend=no&hconst=73&omegam=0.27&omegav=0.73&corr_z=1&out_csys=Equatorial&out_equinox=J2000.0&obj_sort=RA+or+Longitude&of=pre_text&zv_breaker=30000.0&list_limit=5&img_stamp=YES
| dead-url=no
}}</ref>
| ra = {{RA|12|50|26.6}}<ref name="ned">{{cite web
| title=NASA/IPAC Extragalactic Database
| work=Results for NGC 4725
| 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>
| dec = {{DEC|+25|30|03}}<ref name="ned" />
| dist_ly = 4,000萬 ± 600萬[[光年]] (1,230萬 ± 190萬[[秒差距]])<ref name="jensenetal2003">{{cite journal
| author=Jensen, Joseph B.; Tonry, John L.; Barris, Brian J.; Thompson, Rodger I.; Liu, Michael C.; Rieke, Marcia J.; Ajhar, Edward A.; Blakeslee, John P.
| title=Measuring Distances and Probing the Unresolved Stellar Populations of Galaxies Using Infrared Surface Brightness Fluctuations
| journal=Astrophysical Journal
| volume=583
| issue=2
| pages=712–726
| url=http://adsabs.harvard.edu/abs/2003ApJ...583..712J
| doi=10.1086/345430
| date=February 2003
| access-date=2011-01-29
| archive-date=2008-03-10
| archive-url=https://web.archive.org/web/20080310175251/http://adsabs.harvard.edu/abs/2003ApJ...583..712J
| dead-url=no
}}</ref>
| z = 1,206 ± 3 公里/秒<ref name="ned" />
| appmag_v = 10.1<ref name="ned" />
| size_v = 10′.7 × 7′.6<ref name="ned" />
| names = [[Uppsala General Catalogue|UGC]] 7989,<ref name="ned" /> [[主要星系目錄|PGC]] 43451<ref name="ned" />
}}

'''NGC 4725'''是一個位於[[后髮座]]，距離大約4,000萬[[光年]]的[[中間螺旋星系|中間]][[棒旋星系|棒狀]][[螺旋星系|螺旋]][[星系]]。NGC 4725也是一個[[西佛星系]]，這表明它有一個超大質量黑洞的活躍星系核。

[[英國]][[天文學家]][[威廉·赫歇爾]]於1785年4月6日發現NGC 4725。NGC 4725星系距離[[銀河系]]約4,000萬[[光年]]。NGC 4725是[[后髮座I星系群]]中最亮的成員，儘管NGC 4725與其他成員相比相對孤立。NGC 4725受到強烈擾動，並與鄰近的螺旋星系[[NGC 4747]]相互作用，其螺旋臂顯示出扭曲的跡象。兩顆行星的角間距為24 ′，對應的投影線性間距為 370 千光年。潮汐柱從NGC 4747延伸至NGC 4725。

== 相關條目 ==
* [[史匹哲太空望遠鏡]]

== 外部連結 ==
{{commons|NGC 4725|NGC 4725}}
* [https://web.archive.org/web/20060427151003/http://www.seds.org/~spider/ngc/ngc.cgi?n4725 '''NOAO''': NGC 4725]
* [https://web.archive.org/web/20090609084554/http://www.astrophoto.net/ngc4725.html NGC 4725]
* [http://antwrp.gsfc.nasa.gov/apod/ap050901.html '''APOD''': One-Armed Spiral Galaxy NGC 4725 (9/1/05)]{{Wayback|url=http://antwrp.gsfc.nasa.gov/apod/ap050901.html |date=20100714063942 }}
* [https://web.archive.org/web/20060511150912/http://www.spiral-galaxies.com/NGC/NGC-4725.html NGC 4725 in Coma-Berenices]
* [https://web.archive.org/web/20090609103109/http://www.dsi-astronomie.de/NGC4725.htm NGC4725]

== 參考資料 ==
{{reflist}}

{{Catalogs|NGC=4725}}

[[Category:特殊星系]]
[[Category:中間螺旋星系]]
[[Category:后髮座]]
[[Category:NGC天體|4725]]
[[Category:UGC天體|07989]]
[[Category:PGC天體|43451]]

NGC 4725 - 版本历史

2025年4月3日 (四) 00:45 imported>Hikaru Genji