NGC 6166

Coordinates: 16h 28m 38.276s, +39° 33′ 04.97″

NGC 6166

Galaxy NGC 6166
Observation data (J2000 epoch)
Constellation Hercules
Right ascension 16h 28m 38.276s
Declination +39° 33′ 04.97″
Redshift z = −0.030354
(minus sign
indicates blueshift)
Helio radial velocity −9100 km/s
Distance 490 Mly
(142 mpc)
Type cD2 pec.
Apparent dimensions (V) 1.9’ x 1.4’
Apparent magnitude (V) 12.78 [1]
Absolute magnitude (V) −24.1
Other designations
UGC 10409 CGCG 2205.6+3107 0504 MCG +07 -34-060 058 265 338
NGC 6166

NGC 6166 is an elliptical galaxy in the Abell 2199 cluster. It lies 490 million light years away in the constellation Hercules. The primary galaxy in the cluster is one of the most luminous galaxies known in terms of X-ray emissions.[2]

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.[3]

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)[4] orbiting the galaxy.[5] More recent estimates, however, give an even higher number (around 39,000) suggesting also that the halo of this galaxy blends smoothly with the intra-cluster medium[6]

The galaxy harbors a supermassive black hole at its center with a mass of nearly 30 billion \begin{smallmatrix}M_\odot\end{smallmatrix} based on dynamical modelling. [7]

NGC 6166 is known to host an active nucleus, classified as an FR I source, which powers two symmetric parsec-scale radio jets and radio lobes and it is caused by the infall of gas into its center caused by a cooling flow that deposits 200 solar masses of gas every year there.[8]

It has been proposed that a number of O-type stars may be present in the center of NGC 6166[9]

See also

References

  1. ↑ http://simbad.u-strasbg.fr/simbad/sim-id?Ident=NGC%20%206166
  2. ↑ Bridges, T.J.; Cater, D (April 26, 1996). "B-R Colors of Globular Clusters in NGC 6166 (A2199)" (PDF). The Astrophysical Journal 281: 1290–1296. arXiv:astro-ph/9604159v1. Bibcode:1996MNRAS.281.1290B. doi:10.1093/mnras/281.4.1290. Retrieved February 3, 2013.
  3. ↑ Notes for object NGC 6166 (NED)
  4. ↑ Bridges, T.J.; Cater, D (April 26, 1996). "B-R Colors of Globular Clusters in NGC 6166 (A2199)" (PDF). The Astrophysical Journal 281: 3. arXiv:astro-ph/9604159v1. Bibcode:1996MNRAS.281.1290B. doi:10.1093/mnras/281.4.1290. Retrieved February 3, 2013.
  5. ↑ http://adsabs.harvard.edu/full/1990ApJ...355..410P
  6. ↑ Harris, William E.; Blakeslee, John P.; Whitmore, Bradley C.; Gnedin, Oleg Y.; Geisler, Douglas; Rothberg, Barry (2016). "Globular Cluster Systems in Brightest Cluster Galaxies. II. NGC 6166". The Astrophysical Journal 817 (1): 17pp. arXiv:1511.08493. Bibcode:2016ApJ...817...58H. doi:10.3847/0004-637X/817/1/58.
  7. ↑ Magorrian, J.; Tremaine, S.; Richstone, D.; Bender, R.; Bower, G.; Dressler, A.; Faber, S.~M.; Gebhardt, K.; Green, R.; Grillmair, C.; Kormendy, J.; Lauer, T. (June 1998). "The Demography of Massive Dark Objects in Galaxy Centers". The Astronomical Journal 115: 2285–2305. arXiv:astro-ph/9708072. Bibcode:1998AJ....115.2285M. doi:10.1086/300353.
  8. ↑ Di Matteo, Tiziana; Johnstone, Roderick M (March 8, 2001). "Accretion onto Nearby Supermassive Black Holes: Chandra Constraints on the Dominant Cluster Galaxy NGC 6166". The Astrophysical Journal 550: L19. arXiv:astro-ph/0012194. Bibcode:2001ApJ...550L..19D. doi:10.1086/319489.
  9. ↑ Fisher, David; Illingworth, Garth; Franx, Marijn (1995). "Kinematics of 13 brightest cluster galaxies". The Astrophysical Journal Letters 438 (2): 539–562. Bibcode:1995ApJ...438..539F. doi:10.1086/175100.


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