en>Valters1989 at 20:48, 22 October 2013

2013-10-22T20:48:58Z

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{{Sky|16|28|38.276|+|39|33|04.97}}

{{Infobox galaxy
| name = NGC 6166
| image = NGC6166-sm.jpg
| caption = Galaxy NGC 6166
| epoch = [[J2000]]
| type = cD2 pec.
| mass =
| stars =
| ra = {{RA|16|28|38.276}}
| dec = {{DEC|+39|33|04.97}}
| dist_ly = 490 [[light-year|Mly]] <br /> (142 [[parsec|mpc]])
| z = z = −0.030354 <br /> (minus sign <br /> indicates '''[[blueshift]]''')
| h_radial_v = −9100 km/s
| appmag_v = 12.78 <ref>http://simbad.u-strasbg.fr/simbad/sim-id?Ident=NGC%20%206166</ref>
| size_v = 1.9’ x 1.4’
| constellation name = [[Hercules (constellation)|Hercules]]
| absmag_v = −24.1
| names = '''UGC''' 10409 '''CGCG''' 2205.6+3107 0504 '''MCG''' +07 -34-060 058 265 338
}}

'''NGC 6166''' is an [[elliptical galaxy]] in the [[Abell 2199]] cluster. It lies 490 million light years away in the constellation [[Hercules constellation|Hercules]]. The primary galaxy in the cluster is one of the most luminous galaxies known in terms of [[X-ray]] emissions.<ref>{{cite journal |last=Bridges |first=T.J. |last2=Cater |first2=D |date=April 26, 1996 |title=B-R Colors of Globular Clusters in NGC 6166 (A2199) |journal=The Astrophysical Journal |volume= |page=1 |arxiv=astro-ph/9604159v1|accessdate=February 3, 2013 |url=http://arxiv.org/pdf/astro-ph/9604159v1.pdf|bibcode = 1996MNRAS.281.1290B }}</ref>

==Description==

NGC 6166 is a supermassive, type [[cD galaxy]] and one fine example of this type of galaxy, with several smaller galaxies within its envelope.<ref>[http://ned.ipac.caltech.edu/cgi-bin/nph-datasearch?search_type=Note_id&objid=57565&objname=NGC%206166&img_stamp=YES&hconst=73.0&omegam=0.27&omegav=0.73&corr_z=1&of=table Notes for object NGC 6166 (NED)]</ref>

It is suspected to have formed through a number of galaxy collisions. It has a large number of [[globular clusters]] (between 6,200-22,000)<ref>{{cite journal |last=Bridges |first=T.J. |last2=Cater |first2=D |date=April 26, 1996 |title=B-R Colors of Globular Clusters in NGC 6166 (A2199) |journal=The Astrophysical Journal |volume= |page=3 |arxiv=astro-ph/9604159v1|accessdate=February 3, 2013 |url=http://arxiv.org/pdf/astro-ph/9604159v1.pdf|bibcode = 1996MNRAS.281.1290B }}</ref> orbiting the galaxy.<ref>http://adsabs.harvard.edu/full/1990ApJ...355..410P</ref>

The galaxy harbors a supermassive [[black hole]] at its center with a mass of 1 billion <math>\begin{smallmatrix}M_\odot\end{smallmatrix}</math>.<ref name="Di Matteo L19">{{cite journal |last=Di Matteo |first=Tiziana |last2=Johnstone |first2=Roderick M |date=March 8, 2001 |title=Accretion onto Nearby Supermassive Black Holes: Chandra Constraints on the Dominant Cluster Galaxy NGC 6166 |journal=The Astrophysical Journal |volume=550 |page=L19 |arxiv= astro-ph/0012194|id= |accessdate= |url=http://iopscience.iop.org/1538-4357/550/1/L19/fulltext/|bibcode = 2001ApJ...550L..19D |doi = 10.1086/319489 }}</ref>

NGC 6166 is known to host an [[Active galactic nucleus|active nucleus]], classified as an FR I [[Astronomical radio source|source]], which powers two symmetric parsec-scale radio jets and radio lobes and it's caused by the infall of gas into its center caused by a [[cooling flow]] that deposits 200 [[solar mass]]es of gas every year there.<ref name="Di Matteo L19"/>

It has been proposed that a number of [[O-type star]]s may be present in the center of NGC 6166<ref name="Fisher1995">{{cite journal
| author=Fisher, David; Illingworth, Garth; Franx, Marijn
| title=Kinematics of 13 brightest cluster galaxies
| journal=The Astrophysical Journal Letters
| year=1995
| volume=438
| number=2
| pages=539–562
| bibcode=1995ApJ...438..539F
| doi=10.1086/175100}}</ref>

==See also==
*[[Abell 2199]]
*[[List of galaxies]]

==References==
{{reflist}}

[[Category:Abell objects|2199]]
[[Category:Active galaxies]]
[[Category:Hercules (constellation)]]
[[Category:Radio galaxies]]

{{galaxy-stub}}

Power law scheme - Revision history

en>Valters1989 at 20:48, 22 October 2013