NGC 1156

NGC 1156
NGC 1156
	NGC 1156 imaged by the Hubble Space Telescope
Observation data (J2000 epoch)
Constellation	Aries
Right ascension	02h 59m 42.2s
Declination	+25° 14′ 14″
Redshift	375 ± 1 km/s
Apparent magnitude (V)	12.3
Characteristics
Type	IB(s)m
Apparent size (V)	3′.3 × 2′.5
Other designations
	UGC 2455, PGC 11329

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[]

^ ^a ^b ^c ^d ^e ^f ^g ^h "NASA/IPAC Extragalactic Database". Results for NGC 1156. Retrieved 2006-11-27.
^ 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. pp. 315–390. arXiv:astro-ph/9704107. Bibcode:1997ApJS..112..315H. doi:10.1086/313041.

External links[]

Media related to NGC 1156 at Wikimedia Commons
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

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[ned-1] ^ ^a ^b ^c ^d ^e ^f ^g ^h "NASA/IPAC Extragalactic Database". Results for NGC 1156. Retrieved 2006-11-27.

[hoetal1997-2] 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. pp. 315–390. arXiv:astro-ph/9704107. Bibcode:1997ApJS..112..315H. doi:10.1086/313041.

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