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LEDA 74886 - 版本历史
2026-07-11T20:09:08Z
在这个wiki上该页的修订历史
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imported>Jimmy-bot：机器人: 尚未清空的已重定向分类） （Cat:透鏡星系→Cat:透鏡狀星系
2025-06-02T18:21:51Z
<p>机器人: 尚未清空的已重定向分类） （<a href="/index.php?title=Cat:%E9%80%8F%E9%8F%A1%E6%98%9F%E7%B3%BB&action=edit&redlink=1" class="new" title="Cat:透鏡星系（页面不存在）">Cat:透鏡星系</a>→<a href="/index.php?title=Cat:%E9%80%8F%E9%8F%A1%E7%8B%80%E6%98%9F%E7%B3%BB&action=edit&redlink=1" class="new" title="Cat:透鏡狀星系（页面不存在）">Cat:透鏡狀星系</a></p>
<p><b>新页面</b></p><div>{{Infobox galaxy<br />
| name = LEDA 74886<br />
| image = LEDA 074886.jpg<br />
| image_size = 200px<br />
| caption = 由[[昴星團望遠鏡]]拍攝的LEDA 74886星系的假色影像。此影像的對比度已調整，以突出內部盤/棒形結構。<br />
| credit = 阿利斯特·格雷厄姆（Alister Graham）、[[昴星團望遠鏡]]、[[日本國家天文台]]（NAOJ）<br />
| epoch = [[J2000]]<br />
| constellation name = [[波江座]]<br />
| ra = {{RA|03|40|43.233}}<ref name=SIMBAD>{{cite simbad|title=6dFGS gJ034043.2-183843|access-date=20 March 2012}}</ref><br />
| dec = {{DEC|-18|38|43.10}}<ref name=SIMBAD/><br />
| dist_ly = {{convert|70000|kly|kpc|abbr=on|lk=on}} {{hub|0.73}}<br />
| group_cluster = [[NGC 1407]]<ref name=paper/><br />
| type = S0 <ref name=NED>NED, [http://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=LEDA+074886&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 LEDA 074886] (accessed 20 March 2012)</ref><br />
| mass = 1{{e|9}}<br />
| names = [[2微米全天巡天|2MASX]] J03404323-1838431、[[6dFGS]] gJ034043.2-183843<ref name=SIMBAD/><br />
}}<br />
<br />
'''LEDA 74886'''，其名稱也稱為'''2MASXJ03404323-1838431'''，有時也被稱為'''梅拉達-庫特星系'''<ref>{{cite web |last1=Major |first1=Jason |title=Rare Rectangle Galaxy Discovered |url=https://www.universetoday.com/94241/rare-rectangle-galaxy-discovered/ |website=[[Universe Today]] |publisher=www.universetoday.com |access-date=27 October 2021 |date=20 March 2012}}</ref>，是一個罕見的矩形[[矮星系]]<ref name=paper/>。它位於[[星座]][[波江座]]，距離大約{{Convert|70000000|ly|Mpc}}<ref name="NG">{{cite news|url=http://news.nationalgeographic.com/news/2012/03/120320-rectangular-galaxy-emerald-cut-diamond-subaru-space-science/|archive-url=https://web.archive.org/web/20120322055739/http://news.nationalgeographic.com/news/2012/03/120320%2Drectangular%2Dgalaxy%2Demerald%2Dcut%2Ddiamond%2Dsubaru%2Dspace%2Dscience/|url-status=dead|archive-date=March 22, 2012|title=Rare "Emerald Cut" Galaxy Found|journal=National Geographic News| author=Rachel Kaufman|date=March 20, 2012|access-date = March 21, 2012}}</ref>。該星系是在[[昴星團望遠鏡]]使用其主焦點相機（Suprime Cam）拍攝的寬[[視場]]影像中檢測到的<ref name="AS">{{cite news|url=http://www.asianscientist.com/in-the-lab/leda-074886-emerald-cut-diamond-shape-galaxy/|title=Astronomers Discover Galaxy That Resembles An Emerald-Cut Diamond|newspaper=Asian Scientist|date=March 20, 2012|access-date=March 21, 2012}}</ref><ref>{{cite press release|url=http://www.naoj.org/Pressrelease/2012/03/19/index.html|title=Surprising Discovery of a Rare "Emerald-Cut" Galaxy|publisher=[[Subaru Telescope]]—[[National Astronomical Observatory of Japan]]|date=March 19, 2012|access-date=March 23, 2012}}</ref>。使用[[凱克望遠鏡]]，一個側面朝向的薄[[星系盤]]被證實潜伏在LEDA 74886的中心，在0.5kpc的軌道半徑下以33 km/s的速度旋轉<ref name=paper/>。LEDA 74886的質量大約是10<sup>9</sup> [[太陽質量|<var>M</var><sub>☉</sub>]]（做為比較：銀河系的質量是10<sup>12</sup> [[太陽質量|<var>M</var><sub>☉</sub>]]）。<br />
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== 位置 ==<br />
LEDA 74886位於[[天球]]的[[赤經]]（<math>\alpha</math>）{{RA|03|40|43.2}}，和[[赤緯]]（<math>\delta</math>）{{DEC|-18|38|43}}處（[[J2000]]）。它位於[[NGC 1407]]的[[銀冕]]內，這是一個巨大的[[橢圓星系]]，位於LEDA 74886西北約163,000[[光年]]（50 kpc）處<ref name=paper>{{Cite journal|arxiv=1203.3608|journal=The Astrophysical Journal|volume=750|issue=2|pages=121|date=March 19, 2012|last1= Graham|first1=Alister W.|last2= Spitler|first2=Lee R.|last3= Forbes|first3=Duncan A.|last4=Lisker|first4=Thorsten|last5=Moore|first5=Ben|last6=Janz|first6=Joachim|title=Leda 074886: A Remarkable Rectangular-Looking Galaxy |doi=10.1088/0004-637X/750/2/121|bibcode = 2012ApJ...750..121G |s2cid=28425342 }}</ref>。<br />
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== 相關條目 ==<br />
*[[SDSS J074018.17+282756.3]]：是一個螺旋星系，其臂的內部看起來有點方形，但與LEDA 74886不同，因為LEDA 74986沒有明顯的螺旋結構，外部形狀呈方形<ref name=paper/>。<br />
*[[六分儀座A]]：[[本星系群]]的一個成員，由於其年輕藍色恆星的外殼不斷膨脹，呈盒狀，但質量和密度要低得多，並且包括一個LEDA 74886沒有的中心盤<ref name=paper/>。<br />
* [[NGC 4488]]<br />
[[File:LEDA 74886 color cutout rings.v3.skycell.0893.033.stk.4159812.4157025.4152550.unconv.fits sci.jpg|thumb| LEDA 74886的彩色剪切影像。]]<br />
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== 參考文獻 ==<br />
{{reflist}}<br />
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{{波江座}}<br />
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{{DEFAULTSORT:LEDA 74886}}<br />
[[Category:波江座]]<br />
[[Category:透鏡狀星系]]<br />
[[Category:LEDA天體|074886]]</div>
imported>Jimmy-bot