NGC 1079
| NGC 1079 | |
|---|---|
 | |
| Observation data (J2000 epoch) | |
| Constellation | Fornax |
| Right ascension | 02h 43m 44.3s[1] |
| Declination | −29° 00′ 12″[1] |
| Redshift | 0.004843 ± 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 brightness | 14.4 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
[edit]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
[edit]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
[edit]Other galaxies with star-forming rings include:
References
[edit]- ^ a b c "NED search result for NGC 1079". ned.ipac.caltech.edu. Retrieved 2023-11-28.
- ^ a b c d e f "SEDS search result for NGC 1079". spider.seds.org. Retrieved 2023-11-28.
- ^ 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.
- ^ 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.
- ^ "New General Catalog Objects: NGC 1050 - 1099". cseligman.com. Retrieved 2023-11-29.
- ^ 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.
- ^ 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.
- ^ 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.
