NGC 1022

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NGC 1022
NGC 1022 - Supermassive Influence - potw2003a.jpg
Observation data (J2000 epoch)
Constellation Cetus
Right ascension 02h 38m 32.74s [1]
Declination −06° 40′ 38.96″ [1]
Redshift 0.004847 [1]
Heliocentric 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. 1 2 3 4 5 6 7 8 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. arXiv: 1502.03545 . Bibcode:2015ApJS..217...27A. doi:10.1088/0067-0049/217/2/27. S2CID   119253507.
  2. 1 2 3 4 5 Gil 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. S2CID   119085482.
  3. 1 2 3 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. arXiv: astro-ph/0007040 . Bibcode:2000ApJ...544..277F. doi:10.1086/317189. S2CID   119012558.
  4. ↑ 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 .
  5. ↑ 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.
  6. ↑ Garner, Rob (2020-01-24). "Hubble Sees Dusty Galaxy With Supermassive Center". NASA. Retrieved 2020-06-17.
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