Arp 299 | |
---|---|
Observation data (J2000 epoch) | |
Constellation | Ursa Major |
Right ascension | 11h 28m 33.13s |
Declination | +58° 33′ 58.0″ |
Redshift | 0.010 |
Distance | 130 Mly |
Apparent magnitude (V) | 11 |
Characteristics | |
Type | SBm pec. / IBm pec. |
Apparent size (V) | 2′.4 × 1′.9 |
Notable features | interacting galaxies |
Other designations | |
IC 694, NGC 3690, VV 118, Mrk 171 |
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 on 18 March 1790 by German-British astronomer William Herschel. [1]
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. [2] [3]
The interaction of the two galaxies in Arp 299 produced young powerful starburst regions similar to those seen in II Zw 96. [4]
Since 1992, fifteen supernovae have been detected in Arp 299:
Host | Supernova | Type | Magnitude |
---|---|---|---|
NGC 3690 | SN 1992bu [5] | unknown | 16.6 |
NGC 3690 | SN 1993G [6] | Type II | 16.6 |
NGC 3690 | SN 1998T [7] | Type Ib | 15.4 |
NGC 3690 | SN 1999D [8] | Type II | 15.6 |
NGC 3690 | SN 2018lrd [9] | Type Ib | 17.1 |
NGC 3690 | AT 2018mel [10] | Unknown | 16.5 |
NGC 3690 | SN 2019lqo [11] | Type II | 18.3 |
NGC 3690 | SN 2020fkb [12] | Type Ib | 17.8 |
NGC 3690 | SN 2022gnp [13] | Type Ib | 17.7 |
NGC 3690 | SN 2023wrk [14] | Type Ia | 18.1 |
NGC 3690 | SN 2024gzk [15] | Type IIb | 17.8 |
NGC 3690 | SN 2024agfq [16] | type IIn | 19.05 |
IC 694 | SN 2005U [17] | Type II | 16.2 |
IC 694 | SN 2010O [18] [19] [20] | Type Ib | 15.6 |
IC 694 | SN 2010P [21] | Unknown | 18.3 |
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NGC 1614 is the New General Catalogue identifier for a spiral galaxy in the equatorial constellation of Eridanus. It was discovered on December 29, 1885 by American astronomer Lewis Swift, who described it in a shorthand notation as: pretty faint, small, round, a little brighter middle. The nebula was then catalogued by Danish-Irish astronomer J. L. E. Drayer in 1888. When direct photography became available, it was noted that this galaxy displayed some conspicuous peculiarities. American astronomer Halton Arp included it in his 1966 Atlas of Peculiar Galaxies. In 1971, Swiss astronomer Fritz Zwicky described it as a "blue post-eruptive galaxy, compact patchy core, spiral plumes, long blue jet SSW".
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NGC 7828 is a peculiar galaxy in the constellation Cetus. The galaxy lies about 300 million light years away from Earth, which means, given its apparent dimensions, that NGC 7828 is approximately 75,000 light years across. It was discovered by American astronomer Francis Leavenworth in 1886. NGC 7828 forms a pair with its neighbor NGC 7829. The galaxy is included in Halton Arp's Atlas of Peculiar Galaxies in the elliptical galaxies emanating material category as Arp 144.
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