NGC 4136
Galaxy in the constellation Coma Berenices
From Wikipedia, the free encyclopedia
NGC 4136 is a barred spiral galaxy in the constellation of Coma Berenices. Its velocity with respect to the cosmic microwave background is 893±20 km/s, which corresponds to a Hubble distance of 43.0 ± 3.2 Mly (13.17 ± 0.97 Mpc).[1] Additionally, seven non-redshift measurements give a distance of 37.53 ± 4.85 Mly (11.506 ± 1.488 Mpc).[2] It was discovered by German-British astronomer William Herschel on 13 March 1785.[3]
| NGC 4136 | |
|---|---|
NGC 4136 imaged by SDSS | |
| Observation data (J2000 epoch) | |
| Constellation | Coma Berenices |
| Right ascension | 12h 09m 17.7147s[1] |
| Declination | +29° 55′ 39.556″[1] |
| Redshift | 0.002021[1] |
| Heliocentric radial velocity | 606±3 km/s[1] |
| Distance | 43.0 ± 3.2 Mly (13.17 ± 0.97 Mpc)[1] |
| Group or cluster | NGC 4274 Group (LGG 279) |
| Apparent magnitude (V) | 11.1[1] |
| Characteristics | |
| Type | SAB(r)c[1] |
| Size | ~45,900 ly (14.06 kpc) (estimated)[1] |
| Apparent size (V) | 3.9′ × 3.6′[1] |
| Other designations | |
| IRAS 12067+3012, UGC 7134, MCG +05-29-025, PGC 38618, CGCG 158-034[1] | |
Morphology
Eskridge, Frogel, and Pogge published a paper in 2002 describing the morphology of 205 closely spaced spiral or lenticular galaxies. The observations were made in the H-band of the infrared and in the B-band (blue). Eskridge and colleagues described NGC 4136 as follows:
Small, centrally condensed bulge, threaded by a short, thick bar. Bar ends on a full, high-contrast inner ring. The major axis of the ring is nearly orthogonal to that of the bar. Two open, LSB [Low Surface Brightness] spiral arms emerge from the major axis ends of the ring and can be traced through ~120° before fading. The south arm is fainter than the north arm. Most of the bright knots are associated with the interarm disk...We classify NGC 4136 substantially earlier in the H band because the outer, open spiral arms are very faint in the near-IR, leaving the inner arm/ring structure as the spiral feature that dominates the classification.[4]
