NGC 1022
| NGC 1022 | |
|---|---|
 | |
| Observation data (J2000epoch) | |
| Constellation | Cetus |
| Right ascension | 02h38m32.74s[1] |
| Declination | −06° 40′ 38.96″[1] |
| Redshift | 0.004847[1] |
| Heliocentric radial velocity | 1,453 km/s |
| Distance | 67.7Mly(20.75Mpc)[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 | |
| NGC1022,PGC10010 | |
NGC 1022is abarred spiral galaxylocated approximately 68[1]millionlight yearsaway in theequatorialconstellationofCetus.It was discovered on September 10, 1785, byWilliam Herschel.NGC 1022 is a member of the Cetus-Aries group of galaxies.[3]
This galaxy has amorphological classificationSBa,[1]indicating a central bar and tightly wound spiral arms. The elliptical outline of the galaxy has anisophotalaxis ratio of 0.78[1]with anangular sizeof 2.4′by 2.0′and aposition angleof 115°.[2]Thegalactic planeis 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 1.1solar massesper year. Infrared observations of the nucleus suggests a high rate of star formation activity.[5]The circumnuclear region is home to three giantH II regionswith 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
[edit]- ^abcdefghAnn, 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.arXiv:1502.03545.Bibcode:2015ApJS..217...27A.doi:10.1088/0067-0049/217/2/27.S2CID119253507.
- ^abcdeGil de Paz, Armando; et al. (December 2007). "The GALEX Ultraviolet Atlas of Nearby Galaxies".The Astrophysical Journal Supplement Series.173(2): 185–255.arXiv:astro-ph/0606440.Bibcode:2007ApJS..173..185G.doi:10.1086/516636.S2CID119085482.
- ^abcFranco, 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.arXiv:astro-ph/0007040.Bibcode:2000ApJ...544..277F.doi:10.1086/317189.S2CID119012558.
- ^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.arXiv:1301.0638.Bibcode:2013MNRAS.431.3060E.doi:10.1093/mnras/stt385.
- ^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".NASA.Retrieved2020-06-17.
External links
[edit]- "NASA/IPAC Extragalactic Database".Results for NGC 1022.Retrieved2016-11-01.
- "Supermassive Influence".spacetelescope.org/.Retrieved20 January2020.
- "DSO Browser".Galaxy NGC 1022.Retrieved2016-11-24.
Media related toNGC 1022at Wikimedia Commons
