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NGC 1079

Coordinates: Sky map 02h 43m 44.3s, −29° 00′ 12″
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NGC 1079
Observation data (J2000 epoch)
ConstellationFornax
Right ascension02h 43m 44.3s[1]
Declination−29° 00′ 12″[1]
Redshift0.004843 ± 0.000017 km/s[2]
Distance~61,5 Mly[2]
(18.8 ± 1.3 Mpc)
Apparent magnitude (V)11.5[2]
Apparent magnitude (B)12.4[2]
Surface brightness14.4 mag/arcmin2[2]
Characteristics
Apparent size (V)5.50 x 3.1 arcmin[2]
Other designations
ESO 416-13, MCG -5-7-17, IRAS02415-2913, PGC 10330

NGC 1079 is an isolated, weakly barred, grand-design spiral galaxy with transitional ring-like structures[3] containing a number of prominent A type stars.[1] It is located in the Fornax constellation and is part of the Eridanus supercluster.[4] It was first observed and catalogued by the astronomer John Herschel in 1835.[5]

Characteristics

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NGC 1079 has unique characteristics when compared to other galaxies with a similar luminosity. Its H l content per unit blue luminosity is three times higher. Its mass and rotation velocity is twice as large as normal and it has a low surface brightness in its spiral arms, exterior to a high surface brightness center dominated by old stars. A study[6] suggests these characteristics occur due to a luminous matter deficiency relative to its dynamical mass within the Holmberg radius.

Ring structure and star formation

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Astronomers first identified NGC 1079's ring structure in 1996 by studying its HST ultraviolet imaging.[7] Later studies have shown virtually all the star-formation activity in this galaxy occurs inside the ring.[8]

See also

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Other galaxies with star-forming rings include:

References

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  1. ^ a b c "NED search result for NGC 1079". ned.ipac.caltech.edu. Retrieved 2023-11-28.
  2. ^ a b c d e f "SEDS search result for NGC 1079". spider.seds.org. Retrieved 2023-11-28.
  3. ^ de Vaucouleurs, G. (1963-04-01). "Revised Classification of 1500 Bright Galaxies". The Astrophysical Journal Supplement Series. 8: 31. Bibcode:1963ApJS....8...31D. doi:10.1086/190084. ISSN 0067-0049.
  4. ^ Brough, S.; Forbes, D. A.; Kilborn, V. A.; Couch, W.; Colless, M. (2006-07-01). "Eridanus - a supergroup in the local Universe?". Monthly Notices of the Royal Astronomical Society. 369 (3): 1351–1374. arXiv:astro-ph/0603778. Bibcode:2006MNRAS.369.1351B. doi:10.1111/j.1365-2966.2006.10387.x. ISSN 0035-8711.
  5. ^ "New General Catalog Objects: NGC 1050 - 1099". cseligman.com. Retrieved 2023-11-29.
  6. ^ Gallagher, J. S.; Bushouse, H. (1983-01-01). "Optical studies of HI-rich southern galaxies. II. The low- visibility spiral NGC 1079". The Astronomical Journal. 88: 55–61. Bibcode:1983AJ.....88...55G. doi:10.1086/113286. ISSN 0004-6256.
  7. ^ Maoz, D.; Barth, A. J.; Sternberg, A.; Filippenko, A. V.; Ho, L. C.; Macchetto, F. D.; Rix, H. -W.; Schneider, D. P. (1996-06-01). "Hubble Space Telescope Ultraviolet Images of Five Circumnuclear Star-Forming Rings". The Astronomical Journal. 111: 2248. arXiv:astro-ph/9604012. Bibcode:1996AJ....111.2248M. doi:10.1086/117960. ISSN 0004-6256. S2CID 12241545.
  8. ^ Böker, Torsten; Falcón-Barroso, Jesús; Schinnerer, Eva; Knapen, Johan H.; Ryder, Stuart (2008-02-01). "A SINFONI View of Galaxy Centers: Morphology and Kinematics of Five Nuclear Star Formation-Rings". The Astronomical Journal. 135 (2): 479–495. arXiv:0710.4036. Bibcode:2008AJ....135..479B. doi:10.1088/0004-6256/135/2/479. ISSN 0004-6256.