Arp 299
Pair of galaxies in the constellation Ursa Major
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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.[1][2]
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| Arp 299 | |
|---|---|
Arp 299 with NGC 3690 (left) & IC 694 (right), imaged by the Hubble Space Telescope | |
| 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 | |
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.[3][4]
The interaction of the two galaxies in Arp 299 produced young powerful starburst regions similar to those seen in II Zw 96.[5]
Supernovae
Since 1992, fifteen supernovae have been detected in Arp 299:
| Host | Designation | Type | Magnitude | Discovered by | Date | References |
|---|---|---|---|---|---|---|
| NGC 3690 | SN 1992bu | unknown | 16.6 | Van Buren et al. | 9 March 1992 | [6][7] |
| NGC 3690 | SN 1993G | Type II | 16.6 | Lick Observatory Supernova Search (LOSS) | 5 March 1993 | [8][9] |
| NGC 3690 | SN 1998T | Type Ib | 15.4 | Beijing Astronomical Observatory | 3 March 1998 | [10][11] |
| NGC 3690 | SN 1999D | Type II | 15.6 | Beijing Astronomical Observatory | 16 January 1999 | [12][13] |
| NGC 3690 | SN 2018lrd | Type Ib | 17.132 | ATLAS | 10 January 2018 | [14] |
| NGC 3690 | AT 2018mel | Unknown | 18.0119 | Zwicky Transient Facility | 16 May 2018 | [15] |
| NGC 3690 | SN 2019lqo | Type II | 18.33 | Gaia Photometric Science Alerts | 21 July 2019 | [16] |
| NGC 3690 | SN 2020fkb | Type Ib | 17.828 | Automatic Learning for the Rapid Classification of Events (ALeRCE) | 28 March 2020 | [17] |
| NGC 3690 | SN 2022gnp | Type Ib | 17.72 | Zwicky Transient Facility | 5 April 2022 | [18] |
| NGC 3690 | SN 2023wrk | Type Ia | 18.1 | GOTO (telescope array) | 4 November 2023 | [19] |
| NGC 3690 | SN 2024gzk | Type IIb | 17.78 | E. Kankare et al. | 12 April 2024 | [20] |
| NGC 3690 | SN 2024agfq | Type IIn | 19.05 | E. Kankare et al. | 8 June 2024 | [21] |
| IC 694 | SN 2005U | Type II | 16.2 | S. Mattila et al. | 30 January 2005 | [22][23] |
| IC 694 | SN 2010O | Type Ib | 15.6 | Jack B. Newton and Tim Puckett | 24 January 2010 | [24][25][26][27] |
| IC 694 | SN 2010P | Type Ib/IIb | 18.3 | S. Mattila and E. Kankare | 23 January 2010 | [28][29][30] |
