NGC 2444 is a peculiar lenticular galaxy in the constellation Lynx. The galaxy lies about 135 million light years away from Earth, which means, given its apparent dimensions, that NGC 2444 is approximately 50,000 light years across.[1] It was discovered by Édouard Stephan on January 18, 1877.[2] The galaxy interacts with another galaxy, NGC 2445, whose shape is distorted and has large star formation regions.[3]
| NGC 2444 | |
|---|---|
 NGC 2444 (left) and NGC 2445 by Hubble Space Telescope | |
| Observation data (J2000 epoch) | |
| Constellation | Lynx |
| Right ascension | 07h 46m 53.0s[1] |
| Declination | 39° 01′ 55″[1] |
| Redshift | 4048 ± 17 km/s[1] |
| Distance | 135 ± 35 Mly (45.4 ± 10.9 Mpc)[1] |
| Apparent magnitude (V) | 12.9 |
| Characteristics | |
| Type | S0 pec [1] |
| Apparent size (V) | 1.2′ × 0.8′[1] |
| Notable features | interacting galaxy |
| Other designations | |
| UGC 4016, Arp 143, VV 117a, MCG +07-16-016, PGC 21774[1] | |
NGC 2444 has collided with another galaxy, NGC 2445. As a result of the collision, a bridge of young blue stars has formed between the two galaxies, and while the galaxy itself has been stretched, NGC 2444 contains old stars and no new starbirth because it lost its gas long ago, well before this galactic encounter.[3]
One supernova has been observed in NGC 2444/5, SN 2016bam. The supernova occurred between the two galaxies, about 3.5 arcseconds away from a HII region of NGC 2445.[4] It was a type II supernova which had magnitude 16.1 at discovery.[5]
NGC 2445 and NGC 2444 (which lies about one arcminute away) form a pair, known as Arp 143. The pair is part of a galaxy group known as LGG 148. Other members of the group include the galaxies NGC 2476, NGC 2493, NGC 2524, NGC 2415, UGC 3937, and UGC 3944.[6]
References
edit- ^ a b c d e f g h "NASA/IPAC Extragalactic Database". Results for NGC 2444. Retrieved 2024-03-26.
- ^ Seligman, Courtney. "NGC 2444 (= PGC 21774, and with NGC 2445 = Arp 143)". Celestial Atlas. Retrieved 19 November 2018.
- ^ a b "Hubble Looks at a 'Space Triangle' Spawned by a Galaxy Collision". www.spacetelescope.org. 22 February 2022. Retrieved 26 March 2024.
This article contains quotations from this source, which is available under the Creative Commons Attribution 4.0 Unported (CC BY 4.0) license.
- ^ Taggart, K; Perley, D A (5 April 2021). "Core-collapse, superluminous, and gamma-ray burst supernova host galaxy populations at low redshift: the importance of dwarf and starbursting galaxies". Monthly Notices of the Royal Astronomical Society. 503 (3): 3931–3952. arXiv:1911.09112. doi:10.1093/mnras/stab174.
- ^ "SN 2016bam | Transient Name Server". www.wis-tns.org. Retrieved 26 March 2024.
- ^ Garcia, A. M. (1 July 1993). "General study of group membership. II. Determination of nearby groups". Astronomy and Astrophysics Supplement Series. 100: 47–90. Bibcode:1993A&AS..100...47G. ISSN 0365-0138.
External links
edit
- NGC 2444 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images