NGC 4689 explained

NGC 4689
Epoch:J2000
Type:SA(rs)bc, LINER[1]
Dist Ly:54,025,244 ly
Group Cluster:Virgo Cluster
Z:0.005390/1616 km/s
Appmag V:11.6
Size V:4.3 x 3.5
Constellation Name:Coma Berenices
Names:PGC 43186, UGC 7965, VCC 2058
Size:~78,581.58 ly (estimated)

NGC 4689 is a spiral galaxy located about 54 million light-years away[2] in the constellation of Coma Berenices.[3] NGC 4689 is also classified as a LINER galaxy. NGC 4689 is inclined at an angle of about 36° which means that the galaxy is seen almost face-on to the Earth's line of sight.[4] NGC 4689 was discovered by astronomer William Herschel on April 12, 1784.[5] The galaxy is a member of the Virgo Cluster.[6]

Physical characteristics

NGC 4689 has ring-like feature in its inner regions. Surrounding the inner ring lies a zone of bright, flocculent spiral structure with a ring-like boundary. Outside this zone is a well-defined, diffuse outer ring which is an unusual feature for a late-type galaxy like NGC 4689.[7]

Star formation

The star forming disk in NGC 4689 has been truncated which means that the amount of star formation has been reduced significantly. This truncation may have been caused by an interaction with intracluster medium of the Virgo Cluster causing the galaxy to lose much of its interstellar medium in an effect known as ram-pressure stripping. Due to its reduced amount of star formation, NGC 4689 has been classified as an anemic galaxy.[8]

See also

Notes and References

  1. Web site: NASA/IPAC Extragalactic Database . Results for NGC 4689 . 2017-09-25.
  2. Web site: Your NED Search Results. ned.ipac.caltech.edu. 2017-09-29.
  3. Web site: Galaxy NGC 4689 - Barred Spiral Galaxy in Coma Berenices Constellation · Deep Sky Objects Browser. Rojas. Sebastián García. DSO Browser. en. 2017-09-29.
  4. Kuno. Nario. Sato. Naoko. Nakanishi. Hiroyuki. Hirota. Akihiko. Tosaki. Tomoka. Shioya. Yasuhiro. Sorai. Kazuo. Nakai. Naomasa. Nishiyama. Kota. 2007. Nobeyama CO Atlas of Nearby Spiral Galaxies: Distribution of Molecular Gas in Barred and Non-barred Spiral Galaxies. Publications of the Astronomical Society of Japan. 59. 117–166. Vila-Vilaro ́. Baltsar. 0705.2678 . 10.1093/pasj/59.1.117. 2007PASJ...59..117K. 14076941.
  5. Web site: New General Catalog Objects: NGC 4650 - 4699. cseligman.com. en-US. 2017-09-29.
  6. Web site: The Virgo Cluster. www.atlasoftheuniverse.com. 2017-09-30.
  7. Web site: NGC 4689 - (R)SA(rs)bc. The de Vaucouleurs Atlas of Galaxies. 2017-09-28. 2012-08-09. https://web.archive.org/web/20120809043703/http://kudzu.astr.ua.edu/devatlas/NGC_4689______B___________.html. dead.
  8. Elmegreen. Debra Meloy. Elmegreen. Bruce G.. Frogel. Jay A.. Eskridge. Paul B.. Pogge. Richard W.. Gallagher. Andrew. Iams. Joel. Arm Structure in Anemic Spiral Galaxies. 2 May 2002. The Astronomical Journal. 124. 2. 777–781. astro-ph/0205105. 2002AJ....124..777E. 10.1086/341613. 7757634.

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "NGC 4689".

Except where otherwise indicated, Everything.Explained.Today is © Copyright 2009-2024, A B Cryer, All Rights Reserved. Cookie policy.