Arp 299 (parts of it also known as IC 694 and NGC 3690) is a pair of colliding galaxies approximately 134 million light-years away in the constellation Ursa Major. Both of the galaxies involved in the collision are barred irregular galaxies. NGC 3690 was discovered by German-British astronomer William Herschel on 18 March 1790.
It is not completely clear which object is historically called IC 694. According to some sources, the small appendage more than an arcminute northwest of the main pair is actually IC 694, not the primary (eastern) companion.
The interaction of the two galaxies in Arp 299 produced young powerful starburst regions similar to those seen in II Zw 96.
Supernovae Since 1992, fifteen supernovae have been detected in Arp 299: +HostDesignationTypeMagnitudeDiscovered byDateReferencesNGC 3690SN 1992buunknown16.6Van Buren et al.9 March 1992NGC 3690SN 1993GType II16.6Lick Observatory Supernova Search (LOSS)5 March 1993NGC 3690SN 1998TType Ib15.4Beijing Astronomical Observatory3 March 1998NGC 3690SN 1999DType II15.6Beijing Astronomical Observatory16 January 1999NGC 3690SN 2018lrdType Ib17.132ATLAS10 January 2018NGC 3690AT 2018melUnknown18.0119Zwicky Transient Facility16 May 2018NGC 3690SN 2019lqoType II18.33Gaia Photometric Science Alerts21 July 2019NGC 3690SN 2020fkbType Ib17.828Automatic Learning for the Rapid Classification of Events (ALeRCE)28 March 2020NGC 3690SN 2022gnpType Ib17.72Zwicky Transient Facility5 April 2022NGC 3690SN 2023wrkType Ia18.1GOTO (telescope array)4 November 2023NGC 3690SN 2024gzkTypeIIb17.78E. Kankare et al.12 April 2024NGC 3690SN 2024agfqTypeIIn19.05E. Kankare et al.8 June 2024IC 694SN 2005UType II16.2S. Mattila et al.30 January 2005IC 694SN 2010OType Ib15.6Jack B. Newton and Tim Puckett24 January 2010IC 694SN 2010PType Ib/IIb18.3S. Mattila and E. Kankare23 January 2010
See also Antennae Galaxies Mice Galaxies
References 2010O in NGC 3690 (David Bishop)
External links