NGC 660
01h 43m 02.4s, +13° 38′ 42″| NGC 660 | |
|---|---|
arcmin[2] | |
| Other designations | |
| NGC 660,[2] PGC 6318,[1] LEDA 6318,[2] UGC 1201[2] |
NGC 660 is a
The ring is not actually polar, but rather has an
Data about the dark matter halo of NGC 660 can be extracted by observing the gravitational effects of the dark matter on the disk and ring's rotation.[3] From the core of the disk, radio waves are being emitted. The source of these waves is an area only 21 light-years across. This may indicate the presence of a super-cluster of stars located within an area of cloud of gas.[4] The region in the centre has a vast amount of star formation, so luminous that it is considered to be a starburst galaxy.[6]
Late in 2012, this polar-ring galaxy produced an enormous outburst having a magnitude of approximately ten times brighter than a supernova explosion. The cause is not certain, but this event may have resulted from a tremendous jet being emanated from the galaxy's central black hole.[5]
NGC 660 is a member of the M74 Group.[7]
See also
References
- ^ a b c d e f "NGC 0660". NASA/IPAC Extragalactic Database. Retrieved 20 January 2015.
- ^ a b c d e f "NGC 660". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 20 January 2015.
- ^ a b Nemiroff, R.; Bonnell, J., eds. (8 November 2014). "Polar Ring Galaxy NGC 660". Astronomy Picture of the Day. NASA. Retrieved 2015-01-20.
- ^ a b c "NGC 660 And A Rare Polar-Ring Galaxy". Science 2.0. 18 October 2012. Retrieved 2015-01-20.
- ^ ESA. Retrieved 2015-01-20.
- ^ "NGC 660". National Optical Astronomy Observatory. Archived from the original on 2015-01-21. Retrieved 2015-01-20.
- ISBN 978-3-319-18872-0.
External links
Media related to NGC 660 at Wikimedia Commons
