NGC 3783
| NGC 3783 | |
|---|---|
|
Artist's impression of the surroundings of the supermassive black hole in NGC 3783 | |
| Observation data | |
| Constellation | Centaurus |
| Right ascension | 11h 39m 01.721s[1] |
| Declination | –37° 44′ 18.60″[1] |
| Redshift | 0.008506 ± 0.000100[2] |
| Helio radial velocity | +2,817[3] km/s |
| Distance | 135.7 e6ly (41.60[4] Mpc) |
| Group or cluster | NGC 3783 group |
| Type | SBa[5] |
| Apparent dimensions (V) | 1′.9 × 1′.7[5] |
| Apparent magnitude (V) | 13.43 |
| Notable features | Seyfert 1 |
NGC 3783 is a barred spiral galaxy located about 137[4] million light years away in the constellation Centaurus.[6] It is inclined by an angle of 23° to the line of sight from the Earth along a position angle of about 163°. The morphological classification of SBa[5] indicates a bar structure across the center (B) and tightly-wound spiral arms (a).[7] Although not shown by this classification, observers note the galaxy has a luminous inner ring surrounding the bar structure. The bright compact nucleus is active and categorized as a Seyfert 1 type. This nucleus is a strong source of X-ray emission and undergoes variations in emission across the electromagnetic spectrum.[5]
The source of the activity in this galaxy is a rapidly rotating supermassive black hole, which is located at the core and is surrounded by an accretion disk of dust.[8] The estimated mass of this black hole is 8.7 million ([8.7 ± 1.1] × 106) times the mass of the Sun.[9] Interferometric observations yield an inner radius of 0.52 ± 0.16 ly (0.16 ± 0.05 pc) for the orbiting torus of dust.[10]
This is a member of a loose association of 47 galaxies known as the NGC 3783 group. Located at a mean distance of 117 million light-years (36 Mpc), the group is centered at coordinates α = 11h 37m 12s, δ = –37° 30′ 57.6″: equivalent to about 870×103 ly (267 kpc) from NGC 3783. The NGC 3783 group has a mean velocity of 2,903 ± 26 km/s with respect to the Sun and a velocity dispersion of 190 ± 24 km/s. The diffuse X-ray emission of the group is roughly centered on the galaxy NGC 3783.[11]
References
- ↑ 1.0 1.1 Skrutskie, M. F. et al. (February 2006), "The Two Micron All Sky Survey (2MASS)", Astrophysical Journal 131 (2): 1163–1183, Bibcode:2006AJ....131.1163S, doi:10.1086/498708.
- ↑ Strauss, Michael A. et al. (November 1992), "A redshift survey of IRAS galaxies. VII - The infrared and redshift data for the 1.936 Jansky sample", Astrophysical Journal Supplement Series 83 (1): 29–63, Bibcode:1992ApJS...83...29S, doi:10.1086/191730.
- ↑ Jones, D. Heath et al. (October 2009), "The 6dF Galaxy Survey: final redshift release (DR3) and southern large-scale structures", Monthly Notices of the Royal Astronomical Society 399 (2): 683–698, arXiv:0903.5451, Bibcode:2009MNRAS.399..683J, doi:10.1111/j.1365-2966.2009.15338.x.
- ↑ 4.0 4.1 Pereira-Santaella, Miguel et al. (December 2010), "The Mid-infrared High-ionization Lines from Active Galactic Nuclei and Star-forming Galaxies", The Astrophysical Journal 725 (2): 2270–2280, arXiv:1010.5129, Bibcode:2010ApJ...725.2270P, doi:10.1088/0004-637X/725/2/2270.
- ↑ 5.0 5.1 5.2 5.3 García-Barreto, J. A. et al. (August 1999), "HI spatial distribution in the galaxy NGC 3783", Astronomy and Astrophysics 348: 685–692, arXiv:astro-ph/9906492, Bibcode:1999A&A...348..685G.
- ↑ "The active galaxy NGC 3783 in the constellation of Centaurus", European Southern Observatory, June 20, 2013, retrieved 2013-06-29.
- ↑ Buta, Ronald J. et al. (2007), Atlas of Galaxies, Cambridge University Press, pp. 13–17, ISBN 0521820480.
- ↑ Brenneman, L. W. et al. (August 2011), "The Spin of the Supermassive Black Hole in NGC 3783", The Astrophysical Journal 736 (2): 103, arXiv:1104.1172, Bibcode:2011ApJ...736..103B, doi:10.1088/0004-637X/736/2/103.
- ↑ Onken, Christopher A.; Peterson, Bradley M. (June 2002), "The Mass of the Central Black Hole in the Seyfert Galaxy NGC 3783", The Astrophysical Journal 572 (2): 746–752, arXiv:astro-ph/0202382, Bibcode:2002ApJ...572..746O, doi:10.1086/340351.
- ↑ Weigelt, G. et al. (May 2012), "VLTI/AMBER observations of the Seyfert nucleus of NGC 3783", Astronomy & Astrophysics 541: L9, arXiv:1204.6122, Bibcode:2012A&A...541L...9W, doi:10.1051/0004-6361/201219213.
- ↑ Kilborn, Virginia A. et al. (September 2006), "Gaseous tidal debris found in the NGC 3783 group", Monthly Notices of the Royal Astronomical Society 371 (2): 739–749, arXiv:astro-ph/0606463, Bibcode:2006MNRAS.371..739K, doi:10.1111/j.1365-2966.2006.10697.x.
External links
- Roy, Steve; Kennedy, Barbara; Tucker, Wallace (May 25, 2000), "Chandra Clocks Million Mile Per Hour Wind Expanding From Vicinity of Giant Black Hole", Chandra Press Room, retrieved 2013-06-29.
- Hönig, Sebastian; Gandhi, Poshak; Weigelt, Gerd; Duschl, Wolfgang; Hook, Richard (June 20, 2013), "Dusty Surprise Around Giant Black Hole", European Southern Observatory, retrieved 2013-06-29.
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