NGC 3945
Coordinates: 
11h 53m 13.726s, +60° 40′ 32.02″
11h 53m 13.726s, +60° 40′ 32.02″| NGC 3945 | |
|---|---|
J2000 epoch) | |
| Constellation | Ursa Major |
| Right ascension | 11h 53m 13.726s[1] |
| Declination | +60° 40′ 32.02″[1] |
| Redshift | 0.004153[2] |
| Heliocentric radial velocity | 1242 ± 22 km/s[2] |
| Distance | 63 Mly (19.4 Mpc)[3] |
| Apparent magnitude (V) | 10.75[4] |
| Apparent magnitude (B) | 11.70[4] |
| Characteristics | |
| Type | (R)SB(rs)0+[3] |
| Other designations | |
| UGC 6860, MCG +10-17-096, PGC 37258[2] | |
NGC 3945 is a barred lenticular galaxy in the constellation Ursa Major. It was discovered on March 19, 1790, by the astronomer William Herschel.[5]
NGC 3945 has a complex structure, with two concentric bars and a
LINER galaxy.[3] The formation history of NGC 3945 is likely quite complex, with the pseudo-bulge being formed gradually from disk material, while bulges (spheroidal components) would have formed from violent merger events.[3]
Unlike galaxies with similar
luminosities, the central black hole of NGC 3945 has an unusually low mass, estimated to be around 9×106 M☉. However, it is also possible that NGC 3945 has no central black hole at all.[7]
References
- ^ S2CID 18913331.
- ^ a b c "NGC 3945". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-05-18.
- ^ .
- ^ a b "Search specification: NGC 3945". HyperLeda. Université Claude Bernard Lyon 1. Retrieved 2021-05-18.
- ^ Seligman, Courtney. "New General Catalogue objects: NGC 3900 - 3949". cseligman.com. Retrieved 2021-05-18.
- S2CID 16126374.
- S2CID 14365610.
External links
Media related to NGC 3945 at Wikimedia Commons
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