NGC 3741
Galaxy in the constellation Ursa Major
From Wikipedia, the free encyclopedia
NGC 3741 is an irregular galaxy in the constellation Ursa Major. It was discovered by John Herschel on March 19, 1828.[4] At a distance of about 10 million light-years (3.2 Mpc), it is located in the M94 Group.[3] It is relatively undisturbed by other galaxies.[3]
| NGC 3741 | |
|---|---|
Hubble Space Telescope image of NGC 3741 | |
| Observation data (J2000 epoch) | |
| Constellation | Ursa Major |
| Right ascension | 11h 36m 05s[1] |
| Declination | +45° 17′ 02″[1] |
| Redshift | 0.000764[2] |
| Heliocentric radial velocity | 229 ± 4 km/s[2] |
| Distance | 10 Mly (3.2 Mpc)[3] |
| Apparent magnitude (V) | 14.23[1] |
| Apparent magnitude (B) | 14.55[1] |
| Characteristics | |
| Type | ImIII/BCD[2] |
| Other designations | |
| NGC 3741, UGC 6572, MCG +08-21-068, PGC 35878, SDSS J113605.75+451702.9[1] | |
NGC 3741 is an unusual galaxy in several aspects. It has a disk of neutral hydrogen (H I) that is extremely wide, extending some 23,000 light-years (7 kpc). The disk is strongly but symmetrically warped.[5] With a mass-to-light ratio of MT/LB ~ 149, it is highly rich in dark matter.[6]
NGC 3741 has a central bar and a faint spiral arm rich in H I. The bar rotates slowly, likely due to interaction with the dark matter.[7] The bar and spiral arms would make NGC 3741 a low-luminosity spiral galaxy.[3] The unusual properties could be explained if NGC 3741 were a late-stage merger between a low-mass companion or if it accreted mass from the intergalactic medium.[3]
