| NGC 5679 | |
|---|---|
 Arp 274 (NGC 5679C, NGC 5679B and NGC 5679A) imaged by theHubble Space Telescope | |
| Observation data (J2000epoch) | |
| Constellation | Virgo |
| Right ascension | Center: 14h 35m 08.763s[1] Left: 14h 35m 11.0s[2] Right: 14h 35m 06.354s[3] |
| Declination | Center: +05° 21′ 32.41″[1] Left: +05° 21′ 16″[2] Right: +05° 21′ 24.41″[3] |
| Redshift | Center: 0.028900[1] Right: 0.02487[2] |
| Heliocentric radial velocity | Center: 8654 Left: 7483 Right: 7618 |
| Apparent magnitude (B) | Center: 14.5[4] Left: 16[2] Right: 14.5[3] |
| Characteristics | |
| Type | Center: Sbc[4] Right: S[3] |
| Apparent size (V) | Center: 1.013' × 0.669'[4] Left: 0.17' × 0.11'[2] Right: 0.393' × 0.338'[3] |
| Notable features | Interacting galaxy triple |
| Other designations | |
| Center:NGC 5679B,PGC 52132,UGC 9383,MCG+01-37-035, VV 458 Left:NGC 5679C,PGC 52129,MCG+01-37-036 Right:NGC 5679A,PGC 52130,MCG+01-37-034,SDSS J143506.38+052124.5 | |
TheNGC 5679 group, also known asArp 274, is a triplet ofgalaxies,MCG+1-37-36, MCG+1-37-35 and MCG+1-37-34, spanning about200000light-years and at some 400 million light-years from Earth in the constellationVirgo.[1] Arp 274 refers to theAtlas of Peculiar Galaxies, compiled byHalton Arp in 1966. Galaxies 269 through 274 in his catalogue are galaxies that appear to have connectedarms.
NGC 5679 was imaged byHubble in 2009, in a combination of blue,visible,infrared andHα filters. The photograph shows that all three galaxies, especially the galaxies on the left and right, arestarburst galaxies, meaning that there is currently a large amount ofstar formation in the galaxies.Interstellar dust can be seen between the areas of star formation. Two bright stars can be seen just above the galaxy on the right side; these are foreground stars that are actually part of our own galaxy.[5]
Redshift measurements of the three galaxies give theseradial velocity values, from left to right: 7483, 8654, and 7618km/s.[5] The relatively high redshift for the center galaxy means that it is much farther away - about 65 million light years (20megaparsecs) behind the other two galaxies.[6] Thus, the center galaxy is likely a background object. The NGC 5679 group was previously thought to be interacting gravitationally, however the newer Hubble image seems to confirm suspicions that the center galaxy is not interacting, as the galaxy arms are not distorted like typicalinteracting galaxies.[5]
Onesupernova has been observed in NGC 5679: SN 1982D (type unknown, mag. 18) was discovered by Halton Arp and Jack W. Sulentic on 23 March 1982.[7][8]
Media related toNGC 5679 at Wikimedia Commons