Astronomy:NGC 1022
| NGC 1022 | |
|---|---|
 | |
| Observation data (J2000 epoch) | |
| Constellation | Cetus |
| Right ascension | 02h 38m 32.74s[1] |
| Declination | −06° 40′ 38.96″[1] |
| Redshift | 0.004847[1] |
| Helio radial velocity | 1,453 km/s |
| Distance | 67.7 Mly (20.75 Mpc)[1] |
| Apparent magnitude (V) | 11.34±0.13[2] |
| Apparent magnitude (B) | 12.09±0.13[2] |
| Characteristics | |
| Type | SBa[1] (R')SB(s)a;HII[2] SBa(r)p[3] |
| Apparent size (V) | 2.4′ × 2.0′[2] |
| Other designations | |
| NGC 1022, PGC 10010 | |
NGC 1022 is a barred spiral galaxy located approximately 68[1] million light years away in the equatorial constellation of Cetus. It was discovered on September 10, 1785, by William Herschel. NGC 1022 is a member of the Cetus-Aries group of galaxies.[3]
This galaxy has a morphological classification SBa,[1] indicating a central bar and tightly wound spiral arms. The elliptical outline of the galaxy has an isophotal axis ratio of 0.78[1] with an angular size of 2.4′ by 2.0′ and a position angle of 115°.[2] The galactic plane is inclined at an angle of 24° to the line of sight from the Earth. The central bar is boxy in shape with narrow spurs that are offset from the main axis.[4]
NGC 1022 is forming new stars at an estimated rate of 1.1 solar masses per year. Infrared observations of the nucleus suggests a high rate of star formation activity.[5] The circumnuclear region is home to three giant H II regions with one at the nucleus, a second to the northeast, and the third slightly to the northwest.[3] The galaxy was observed as part of a Hubble study of black holes.[6]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Ann, H. B. et al. (2015). "A Catalog of Visually Classified Galaxies in the Local (z ~ 0.01) Universe". The Astrophysical Journal Supplement Series 217 (2): 27–49. doi:10.1088/0067-0049/217/2/27. Bibcode: 2015ApJS..217...27A.
- ↑ 2.0 2.1 2.2 2.3 2.4 Gil de Paz, Armando et al. (December 2007). "The GALEX Ultraviolet Atlas of Nearby Galaxies". The Astrophysical Journal Supplement Series 173 (2): 185–255. doi:10.1086/516636. Bibcode: 2007ApJS..173..185G.
- ↑ 3.0 3.1 3.2 Franco, José et al. (November 2000). "Decreasing Density Gradients in Circumnuclear H II Regions of Barred Galaxies NGC 1022, NGC 1326, and NGC 4314". The Astrophysical Journal 544 (1): 277–282. doi:10.1086/317189. Bibcode: 2000ApJ...544..277F.
- ↑ Erwin, Peter; Debattista, Victor P. (June 2013). "Peanuts at an angle: detecting and measuring the three-dimensional structure of bars in moderately inclined galaxies". Monthly Notices of the Royal Astronomical Society 431 (4): 3060–3086. doi:10.1093/mnras/stt385. Bibcode: 2013MNRAS.431.3060E.
- ↑ Garcia-Barreto, J. A. et al. (December 1991). "Circumnuclear star formation in the barred galaxy NGC 1022". Astronomy and Astrophysics 252: 19. Bibcode: 1991A&A...252...19G.
- ↑ Garner, Rob (2020-01-24). "Hubble Sees Dusty Galaxy With Supermassive Center". http://www.nasa.gov/image-feature/goddard/2020/hubble-sees-dusty-galaxy-with-supermassive-center.
External links
- "NASA/IPAC Extragalactic Database". Results for NGC 1022. http://ned.ipac.caltech.edu/cgi-bin/datasearch?search_type=z_id&objid=7368&objname=NGC%201022&img_stamp=YES&hconst=73.0&omegam=0.27&omegav=0.73&corr_z=1&of=table.
- "Supermassive Influence" (in en). https://www.spacetelescope.org/images/potw2003a/.
- "DSO Browser". Galaxy NGC 1022. https://dso-browser.com/deep-sky/1919/ngc-1022/galaxy.
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