NGC 1156

NGC 1156
NGC 1156 imaged by the Hubble Space Telescope
Observation data (J2000 epoch)
ConstellationAries
Right ascension02h 59m 42.2s[1]
Declination+25° 14′ 14″[1]
Redshift375 ± 1 km/s[1]
Apparent magnitude (V)12.3[1]
Characteristics
TypeIB(s)m[1]
Apparent size (V)3.3′ × 2.5′[1]
Other designations
UGC 2455,[1] PGC 11329[1]

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.

It has a H II nucleus.[2]

The AGES survey has discovered a candidate dark galaxy close to NGC 1156, one of only a few so far found.

References

  1. ^ a b c d e f g h "NASA/IPAC Extragalactic Database". Results for NGC 1156. Retrieved 2006-11-27.
  2. ^ Ho, Luis C.; Filippenko, Alexei V.; Sargent, Wallace L. W. (October 1997). "A Search for "Dwarf" Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies". Astrophysical Journal Supplement. Vol. 112, no. 2. pp. 315–390. arXiv:astro-ph/9704107. Bibcode:1997ApJS..112..315H. doi:10.1086/313041.


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