NGC 1194
Galaxy in the constellation Cetus
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NGC 1194 is a lenticular galaxy located in the constellation of Cetus. The redshift of the galaxy is (z) 0.013[1] and it was first discovered by the French astronomer named Édouard Stephan in 1883, whom he described it as both faint and small object with a bright center.[3] It is also classified as a Seyfert type 2 galaxy and such contains a megamaser.[4][5]
| NGC 1194 | |
|---|---|
The lenticular galaxy NGC 1194. | |
| Observation data (J2000 epoch) | |
| Constellation | Cetus |
| Right ascension | 03h 03m 49.10s[1] |
| Declination | −01° 06′ 13.37″[1] |
| Redshift | 0.013631[1] |
| Heliocentric radial velocity | 4086 ± 2[1] |
| Distance | 196.2 ± 13.7 Mly (60.14 ± 4.21 Mpc)[1] |
| Apparent magnitude (V) | 13.0[2] |
| Characteristics | |
| Type | SA0+:;Sy1 Sy2[1] |
| Size | ~110,000 ly (33.7 kpc) (estimated)[1] |
| Other designations | |
| PGC 11537, UGC 2514, CGCG 389-068, IRAS 03012-0117, MCG +00-08-078[1] | |
Description
NGC 1194 is categorized as an inclined galaxy of type S0 with its position angle orientated at 145°.[5] The nucleus of this galaxy has been found as active and the nuclear spectrum is shown to contain strong signatures of stellar absorption features suggesting the galaxy had undergone a recent wave of star formation.[6] Although classified as a Seyfert Type 1 galaxy, this was later reclassified as a Seyfert Type 2 galaxy.[7][6] Other studies categorized it as a Type 1.9 Seyfert galaxy instead.[8][9] It has a megamaser, with its disk shown to have an inclination angle of 85° and a kinematic position angle of around 337°. The disk is also depicted as extremely large with both an outer and inner radius of 0.51 and 1.33 parsecs respectively.[10]
Observations made with Hubble Space Telescope has also found there is also radio emission present in the galaxy, described as slightly extended along the position angle of 236°. O III imaging found traces of line emission that is mainly displaced on the western side from the nucleus with two blob features separated by 0.6 arcseconds.[11] Further evidence also discovered streams of interstellar gas towards its companion, suggesting the galaxy might have interacted with it.[12]
A study published in 2001 has discovered the continuum of the galaxy has a reddened appearance. When observed, it is likely to originate from either extinction by the stellar population or interstellar dust that has been emitted out by its own active galactic nucleus.[12] The central supermassive black hole of NGC 1194 is also found to be the largest in any of the megamaser galaxies, with a mass of around 6.5 ± 0.4 x 107 Mʘ.[5][13]