For faster navigation, this Iframe is preloading the Wikiwand page for NGC 5195.

NGC 5195

NGC 5195
哈勃空间望远镜拍摄的涡状星系(M51)。M51A 在影像左方,NGC 5195在影像右上角
Credit: HST/STScI/AURA/NASA/ESA.
观测资料(J2000 历元
星座猎犬座[1]
赤经13h 29m 59.6s[2]
赤纬+47° 15′ 58″[2]
红移465 ± 10 km/s[2]
距离25 ± 3 Mly (7.7 ± 1.0 Mpc)[3]
视星等 (V)10.5[2]
特征
类型不规则或 SB0 pec[4]
角直径 (V)5′.8 × 4′.6[2]
其他名称
Messier 51b,[2] UGC 8494,[2] PGC 47413,[2] Arp 85[2]
参见:星系星系列表

NGC 5195(或称为Messier 51bM51b)是一个和涡状星系(M51A或NGC 5194)交互作用的矮星系。前述两个星系都距离地球约2500万光年,位于猎犬座。而这两个星系是最著名的其中一对交互作用星系。

发现

[编辑]

皮埃尔·梅尚于1781年3月20日发现NGC 5195[5]

和涡状星系的交互作用

[编辑]

NGC 5195和涡状星系组成天文学上最著名的其中一对交互作用星系。两个星系都被列入特殊星系图集,并且是其中一个螺旋星系和其伴星系交互作用的最显著例子之一[6]。这个系统也是相当早期的星系交互作用理论的研究课题 [7]。这两个星系被一个含有大量尘埃的潮汐桥连接,并且桥中的尘埃可以映衬出 NGC 5195的核心。这表明NGC 5195在外观上是位于涡状星系的后方[4]。这两个星系的相遇使M51的螺旋结构被更明显地强化[8]

形态

[编辑]

NGC 5195因为和涡状星系的重力交互作用,导致它的形状已经高度变形。要将它的形态分类是困难的,它有时会被分类为透镜状星系或无定形、不规则星系 [4]。它被认为不属于标准分类系统中的星系[4]

超新星

[编辑]

SN 1945A是至今唯一在NGC 5195内发现的超新星[2]。它的位置在星系核西北方10″处,由天文学家米尔顿·赫马森于1945年4月6日使用威尔逊山天文台口径2.5米望远镜发现。该超新星属于I型超新星,亮度最高时视星等14.0[9]

参见

[编辑]

参考资料

[编辑]
  1. ^ R. W. Sinnott, editor. The Complete New General Catalogue and Index Catalogue of Nebulae and Star Clusters by J. L. E. Dreyer. Sky Publishing Corporation and Cambridge University Press. 1988. ISBN 0-933346-51-4. 
  2. ^ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 NASA/IPAC Extragalactic Database. Results for extended name search on NGC 5195. [2006-12-07]. (原始内容存档于2011-05-14). 
  3. ^ J. L. Tonry, A. Dressler, J. P. Blakeslee, E. A. Ajhar, A. B. Fletcher, G. A. Luppino, M. R. Metzger, C. B. Moore. The SBF Survey of Galaxy Distances. IV. SBF Magnitudes, Colors, and Distances. Astrophysical Journal. 2001, 546 (2): 681–693. Bibcode:2001ApJ...546..681T. arXiv:astro-ph/0011223可免费查阅. doi:10.1086/318301. 
  4. ^ 4.0 4.1 4.2 4.3 A. Sandage, J. Bedke. Carnegie Atlas of Galaxies. Washington, D.C.: Carnegie Institution of Washington. 1994. ISBN 0-87279-667-1. 
  5. ^ SEDS: NGC 5195. [2007-10-13]. (原始内容存档于2007-10-22). 
  6. ^ H. Arp. Atlas of Peculiar Galaxies. Astrophysical Journal Supplement. 1966, 14: 1–20. Bibcode:1966ApJS...14....1A. doi:10.1086/190147. 
  7. ^ A. Toomre, J. Toomre. Galactic Bridges and Tails. Astrophysical Journal. 1972, 178: 623–666. Bibcode:1972ApJ...178..623T. doi:10.1086/151823. 
  8. ^ C. L. Dobbs, C. Theis, J. E. Pringle and M. R. Bate. Simulations of the grand design galaxy M51: a case study for analysing tidally induced spiral structure. Monthly Notices of the Royal Astronomical Society. 2010, 403: 625–645. doi:10.1111/j.1365-2966.2009.16161.x. 
  9. ^ M. L. Humason. Supernova in NGC 5195. Publications of the Astronomical Society of the Pacific. 1945, 57: 174–175. Bibcode:1945PASP...57..174H. doi:10.1086/125712. 

外部链接

[编辑]


{{bottomLinkPreText}} {{bottomLinkText}}
NGC 5195
Listen to this article

This browser is not supported by Wikiwand :(
Wikiwand requires a browser with modern capabilities in order to provide you with the best reading experience.
Please download and use one of the following browsers:

This article was just edited, click to reload
This article has been deleted on Wikipedia (Why?)

Back to homepage

Please click Add in the dialog above
Please click Allow in the top-left corner,
then click Install Now in the dialog
Please click Open in the download dialog,
then click Install
Please click the "Downloads" icon in the Safari toolbar, open the first download in the list,
then click Install
{{::$root.activation.text}}

Install Wikiwand

Install on Chrome Install on Firefox
Don't forget to rate us

Tell your friends about Wikiwand!

Gmail Facebook Twitter Link

Enjoying Wikiwand?

Tell your friends and spread the love:
Share on Gmail Share on Facebook Share on Twitter Share on Buffer

Our magic isn't perfect

You can help our automatic cover photo selection by reporting an unsuitable photo.

This photo is visually disturbing This photo is not a good choice

Thank you for helping!


Your input will affect cover photo selection, along with input from other users.

X

Get ready for Wikiwand 2.0 🎉! the new version arrives on September 1st! Don't want to wait?