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Elliptical galaxy in the constellation Ursa Major From Wikipedia, the free encyclopedia
NGC 3610 is an elliptical galaxy in the constellation Ursa Major.[6] It was discovered on 8 April 1793 by German-British astronomer William Herschel.[7] This galaxy is located at a distance of 106 million light-years (32.5 Mpc) from the Milky Way,[4] and is receding with a galacto-centric radial velocity of 1,819 km/s.[3]
| NGC 3610 | |
|---|---|
Hubble Space Telescope image of NGC 3610, showing its disk | |
| Observation data (J2000 epoch) | |
| Constellation | Ursa Major |
| Right ascension | 11h 18m 25.276s[1] |
| Declination | +58° 47′ 10.49″[1] |
| Redshift | 0.005694[2] |
| Heliocentric radial velocity | 1,732 km/s[3] |
| Galactocentric velocity | 1,819 km/s[3] |
| Distance | 106 Mly (32.5 Mpc)[4] |
| Apparent magnitude (B) | 11.63[3] |
| Characteristics | |
| Type | E5:[2] |
| Mass | 1.01×1011 (stellar)[4] M☉ |
| Size | 76,800 ly (23,560 pc)[2] |
| Apparent size (V) | 1.460′ × 1.168′[1] (NIR) |
| Other designations | |
| NGC 3610, UGC 6319, LEDA 34566, PGC 34566[5] | |
NGC 3610 is a relatively young elliptical galaxy which has not yet lost its disk.[6] It has a morphological classification of E5,[8] indicating a 2:1 ratio between the major and minor axes of the elliptical profile. This is a candidate merger remnant of intermediate age, with a surviving disk of gas and dusk aligned with the major axis.[9] This merger is estimated to have occurred 4±2.5 Gyr ago. The central part of the disk displays warping,[8] and is significantly younger than the remainder of the galaxy.[8]
The unusual amount of blue light emission of NGC 3610, or B–V in the UBV photometric system, suggests recent star formation.[9] The current estimated star formation rate is 0.385±0.375 M☉·yr−1.[4] There is a population of younger globular clusters orbiting the galaxy that is a likely product of the merger. The surviving population of older, metal-rich globular clusters suggests that at least one of the progenitor galaxies had a prominent bulge component.[9]
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