• Source: NGC 6338

NGC 6338 is a large lenticular galaxy located in the constellation Draco. It is located at an estimated distance of 392 million light years from Earth and was discovered by William Herschel in 1789. According to Herschel, he mentioned, "the object is faint, small and round with a little brighter middle."




Characteristics


NGC 6338 is the brightest cluster galaxy in the NGC 6338 group, shown merging with another galaxy group. It forms a pair with MCG +10-24-117. It has an ellipsoidal appearance based on findings of a stellar component revolving around a major axis. NGC 6338 is also more luminous compared to other members with estimated absolute magnitudes of MB = -22.2 and MV = -21.92. NGC 6338 also contains a central bright source when seen in X-rays. A double nucleus is present in NGC 6338.
The nucleus of NGC 6338 is active and it is classified both a LINER as well as a Fanaroff-Riley class type 0 radio galaxy. The most accepted theory for this energy source for active galactic nuclei is the presence of an accretion disk around a giant black hole. Furthermore, NGC 6338 has both young and old radio lobes, with radiative ages of 200 and 50 million years old. It also has a small parsec-scale radio jet with radio emission in its core. There are also X-ray cavities located both northeast and southwest of the galaxy's nucleus.
Based on narrow band imaging taken with Hubble Space Telescope, NGC 6338 contains Hα emission originating from two compact clouds in its galactic center and three filaments along its minor axis. The filaments have a projected outward extension of ~ 13.5" and a total Hα flux of 1.78 x 10-14 erg s-1 cm-2.




References






External links


NGC 6338 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
NCG 6338 on SIMBAD

Kata Kunci Pencarian:

• Daftar objek NGC
• New General Catalogue
• Arp 272
• NGC 6338
• List of NGC objects (6001–7000)
• List of NGC objects
• NGC 6397
• NGC 6357
• New General Catalogue
• NGC 6302
• Butterfly Cluster
• Messier 9
• NGC 6365