| NGC 4294 | |
|---|---|
| SDSS image of NGC 4294 | |
| Observation data (J2000 epoch) | |
| Constellation | Virgo |
| Right ascension | 12h 21m 17.8s [1] |
| Declination | 11° 30′ 38″ [1] |
| Redshift | 0.001184 [1] |
| Heliocentric radial velocity | 355 km/s [1] |
| Distance | 55 Mly (17 Mpc) [1] |
| Group or cluster | Virgo Cluster |
| Apparent magnitude (V) | 12.5 [1] |
| Characteristics | |
| Type | SB(s)cd [1] |
| Size | ~52,000 ly (16 kpc) (estimated) [1] |
| Apparent size (V) | 3.2 x 1.2 [1] |
| Other designations | |
| KCPG 330B, VCC 465, IRAS 12187+1147, UGC 7407, MCG +02-32-009, PGC 39925, CGCG 70-24, SDSS J122117.82+113037.6 [1] | |
NGC 4294 is a barred spiral galaxy [2] with flocculent spiral arms [3] located about 55 million light-years away [2] in the constellation Virgo. The galaxy was discovered by astronomer William Herschel on March 15, 1784 [4] and is a member of the Virgo Cluster. [5] [6] [7]
NGC 4294 appears to be undergoing ram-pressure [8] [9] stripping edge-on. [8]
NGC 4294 hosts many H II regions. [10] [3]
NGC 4294 appears to be in a pair with NGC 4299 [11] [12] [10] [13] [9] [14] [15] and may be possibly tidally interacting. [11] [12] [10] [13] [3] [9] [14] [15]
Effects of a tidal interaction on NGC 4294 are evident as the galaxy has a disturbed optical and HI morphology, [12] [10] a high global star formation rate, [13] [3] and has an observed asymmetry in polarized radio continuum emission. [15]
Chung et al. identified that NGC 4294 has a one sided [16] [17] 88,000 ly (27 kpc ) tail of neutral atomic hydrogen (HI). [9] [18] The tail points to the southwest [16] [14] and appears to be a result of ram-pressure. [18] [19] [9] The tail has no optical counterpart [9] [16] and is oriented parallel to the HI tail found in NGC 4299. [16]
As the tail has no optical counterpart, this makes the probability of the tail being caused by tidal interaction low. However, NGC 4299 lies 88,000 ly (27 kpc ) from NGC 4294 and the two galaxies have almost the same velocity, with a difference of 120 km/s. This means that the scenario of the tail originating from a tidal interaction cannot be ruled out entirely. [9]
NGC 4294 may harbor an intermediate-mass black hole with an estimated mass ranging from 3,000 (3*10^3) to 20,000 (2*10^4) solar masses. [20]
-UGC 8153, has a similar-mass central black hole.