NGC 1156
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An ultraviolet image of NGC 1156 taken with GALEX. |
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| Observation data: J2000 epoch | |
|---|---|
| Constellation: | Aries |
| Right ascension: | 02h 59m 42.2s[1] |
| Declination: | +25° 14′ 14″[1] |
| Redshift: | 375 ± 1 km/s[1] |
| Distance: | |
| Type: | IB(s)m[1] |
| Apparent dimensions (V): | 3′.3 × 2′.5[1] |
| Apparent magnitude (V): | 12.3[1] |
| Notable features: | |
| Other designations | |
| UGC 2455,[1] PGC 11329[1] | |
| See also: Galaxy, List of galaxies | |
NGC 1156 is a dwarf irregular galaxy in the Aries constellation of the type Ibm. It is considered a Magellanic-type irregular. The galaxy has a larger than average core, and contains zones of contra-rotating gas. The counter-rotation is thought to be the result of tidal interactions with another gas rich galaxy some time in the past.
The AGES survey has discovered a candidate dark galaxy close to NGC 1156, one of only a few so far found.
It has a H II nucleus.[2]
[edit] External links
- Arecibo Survey Produces Dark Galaxy Candidate (SpaceDaily)
- http://www.astrophotos.net/pages/GALAXIES/NGC%201156.htm
- http://www.jupiter-jp.net/~ike/English/description/N1156.htm
- http://www.ursa.fi/~sirius/cgi-bin/rade.cgi?NGC1156
[edit] References
- ^ a b c d e f g h NASA/IPAC Extragalactic Database. Results for NGC 1156. Retrieved on 2006-11-27.
- ^ Ho, Luis C.; Alexei V. Filippenko & Wallace L. W. Sargent (October 1997), "A Search for "Dwarf" Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies", Astrophysical Journal Supplement 112: 315-390
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