NGC 3783
{{Short description|Galaxy in the constellation Centaurus}}
{{Infobox galaxy
| name = NGC 3783
| image = File:The eponymous NGC 3783 (potw2416a).jpg
| image_scale = 1.4
| caption = NGC 3783 imaged by the Hubble Space Telescope
| epoch = J2000
| pronounce =
| constellation name = Centaurus
| z = {{nowrap|0.008506 ± 0.000100}}
| h_radial_v = +2,817 km/s
| gal_v =
| dist_ly = 135.7 Mly (41.60 Mpc)
| group_cluster = NGC 3783 group
| mass =
| mass_light_ratio =
| stars =
| appmag_v = 13.43
| absmag_v =
| size_v = {{nowrap|1′.9 × 1′.7}}
| size = ~{{convert|65.25|kpc|ly|abbr=on|lk=on|order=flip}} (estimated){{r|ned}}
| notes = Seyfert 1
| names = {{odlist | MCG= -06-26-004 | PGC= 36101 | name= ESO 378- G 014 | IRAS= 11365-3727}}{{cite simbad|title=NGC 3783|accessdate=2021-02-19}}
| references =
}}
NGC 3783 is a barred spiral galaxy located about 135 million light years away in the constellation Centaurus. Its velocity with respect to the cosmic microwave background is 3234 ± 22{{nbsp}}km/s, which corresponds to a Hubble distance of {{convert|47.70 ± 3.35|Mpc|Mly|abbr=on|lk=on|order=flip}}.{{r|ned}} In addition, two non-redshift measurements give a distance of {{convert|47.750 ± 9.250|Mpc|Mly|abbr=on|lk=off|order=flip}}.{{cite web | url = https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+3783 | title = Distance Results for NGC{{nbsp}}3783 | website = NASA/IPAC EXTRAGALACTIC DATABASE | publisher = NASA | access-date = 12 December 2024}} It was discovered by British astronomer John Herschel on 21 April 1835.{{cite web | url = https://cseligman.com/text/atlas/ngc37a.htm#3783 | title = New General Catalogue Objects: NGC{{nbsp}}3783 | last = Seligman | first = Courtney | website = Celestial Atlas | access-date = 12 December 2024}}
NGC 3783 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 indicates a bar structure across the center (B) and tightly-wound spiral arms (a). 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.
File:Artist's impression of the surroundings of the supermassive black hole in NGC 3783.jpg
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. The estimated mass of this black hole, from reverberation mapping, is about 2.8 million times the mass of the Sun. Interferometric observations yield an inner radius of {{Convert|0.16|+/-|0.05|pc|ly|abbr=on|disp=flip}} for the orbiting torus of dust.
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 = {{RA|11|37|12}}, δ = {{DEC|–37|30|57.6}}: equivalent to about {{Convert|267|kpc|e3ly|abbr=on|disp=flip}} 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. The NGC 3783 group is located in the Hydra-Antlia region of the Hydra-Centaurus Supercluster.{{Cite book |last=Tully |first=R. Brent |title=Nearby galaxies catalog |date=1988 |publisher=Cambridge University Press |isbn=978-0-521-35299-4 |location=Cambridge; New York}}{{Cite journal |last1=Fouque |first1=P. |last2=Gourgoulhon |first2=E. |last3=Chamaraux |first3=P. |last4=Paturel |first4=G. |date=1992-05-01 |title=Groups of galaxies within 80 Mpc. II. The catalogue of groups and group members. |url=https://ui.adsabs.harvard.edu/abs/1992A&AS...93..211F |journal=Astronomy and Astrophysics Supplement Series |volume=93 |pages=211–233 |bibcode=1992A&AS...93..211F |issn=0365-0138}}
Gallery
File:NGC 3783 legacy dr10.jpg|NGC 3783 as seen by the legacy surveys. The bright star on the lower left is HD 101274
File:Outflow from active galaxy NGC 3783 (artist’s impression).ogv|This video shows an artist's impression of the dusty wind emanating from the black hole at the centre of galaxy NGC 3783
References
{{Reflist|refs=
| website=NASA/IPAC Extragalactic Database
| publisher = NASA and Caltech
| title=Results for object NGC 3783
| url=https://ned.ipac.caltech.edu/byname?objname=NGC+3783
| access-date=12 December 2024
}}
| title = The active galaxy NGC 3783 in the constellation of Centaurus
| date = June 20, 2013
| work = European Southern Observatory
| url = http://www.eso.org/public/images/eso1327c/
| access-date = 2013-06-29
| postscript = .
}}
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| title = HI spatial distribution in the galaxy NGC 3783
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| title = Gaseous tidal debris found in the NGC 3783 group
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| arxiv = astro-ph/0606463
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| title = VLTI/AMBER observations of the Seyfert nucleus of NGC 3783
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| last1=Skrutskie | first1=Michael F. | last2=Cutri | first2=Roc M.
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| title=A Detailed View of the Broad-line Region in NGC 3783 from Velocity-resolved Reverberation Mapping
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| arxiv=2108.00482 | bibcode=2021ApJ...920..112B
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| doi-access=free
}}
}}
External links
- {{Citation
| first1 = Steve | last1 = Roy
| first2 = Barbara | last2 = Kennedy
| first3 = Wallace | last3 = Tucker
| display-authors = 1
| title = Chandra Clocks Million Mile Per Hour Wind Expanding From Vicinity of Giant Black Hole
| pages = 13
| date = May 25, 2000
| work = Chandra Press Room
| url = http://chandra.si.edu/press/00_releases/press_052500.html
| access-date = June 29, 2013
| bibcode = 2000cxo..pres...13.
}}
- {{Citation
| first1 = Sebastian | last1 = Hönig
| first2 = Poshak | last2 = Gandhi
| first3 = Gerd | last3 = Weigelt
| first4 = Wolfgang | last4 = Duschl
| first5 = Richard | last5 = Hook
| display-authors = 1
| title = Dusty Surprise Around Giant Black Hole
| date = June 20, 2013
| work = European Southern Observatory
| url = http://www.eso.org/public/news/eso1327/
| access-date = June 29, 2013
}}
{{NGC objects:3500-3999}}
{{Centaurus}}
{{Catalogs|NGC=3783}}
{{Sky|11|39|01.721|-|-37|44|18.60|135700000}}
{{DEFAULTSORT:NGC 3783}}
Category:Barred spiral galaxies