NGC 1042
Spiral galaxy in the constellation Cetus
From Wikipedia, the free encyclopedia
NGC 1042 is a spiral galaxy located in the constellation Cetus. It was discovered on 10 November 1885 by American astronomer Lewis Swift.[2] The galaxy has an apparent magnitude of 14.0.
| NGC 1042 | |
|---|---|
NGC 1042 imaged by the Hubble Space Telescope | |
| Observation data (J2000 epoch) | |
| Constellation | Cetus |
| Right ascension | 02h 40m 24.0s[1] |
| Declination | −08° 26′ 01″[1] |
| Redshift | 0.004573 ± 0.000007[1] |
| Heliocentric radial velocity | 1,371 ± 2 km/s |
| Distance | 55.5 Mly (17.02 Mpc) |
| Group or cluster | NGC 1052 group |
| Apparent magnitude (V) | 14.0[1] |
| Characteristics | |
| Type | SAB(rs)cd[1] |
| Size | 39,200 ly |
| Apparent size (V) | 2.3′ × 1.0′ [1] |
| Other designations | |
| IRAS 02379-0838, MCG -02-07-054, PGC 10122[1] | |
NGC 1042 is a low-luminosity active galaxy.[3][4] Furthermore, its luminosity class is III–IV and it has a broad HI line.[5] It is known that NGC 1042 also hosts an intermediate-mass black hole in its center.[6]
NGC 1042 contains an ultraluminous X-ray source called NGC 1042 ULX1.[7]
Morphology
NGC 1042 is a late-type galaxy, classified as type SAB(rs)cd.[8] It has a bulgeless structure with spiral arms consisting of two symmetric arms located in the inner side with ceaseless long outer arms, with an Arm Class 9 classification.[9] The spiral galaxy type of NGC 1042 is a mystery; some astronomers classified it a barred spiral galaxy based on ellipse fitting via B- and H-band images,[10] while others classified it an unbarred spiral galaxy.[11][12] Further evidence by them suggests, the inner arms of NGC 1042 are curved with a bar-like structure that is mistaken as a bar.[13][4]
Nearby galaxies
NGC 1042 appears near the spiral galaxy NGC 1035 in the sky, with both having similar redshifts. The two objects may therefore be physically associated with each other.[14] In additional, NGC 1042 is also a member of the NGC 1052 group.[15] It is shown to be the only galaxy with a large gas reservoir, indicating it was stripped of gas during a past interaction with NGC 1052.[16]
NGC 1042 and its neighbors including NGC 1035
