View source for NGC 6338

{{Short description|Lenticular galaxy in the constellation Draco}}
{{Infobox galaxy|name=[[New General Catalogue|NGC]] 6338|image=File:NGC 6338 SDSS2.jpg|caption=The lenticular galaxy, NGC 6338.|epoch=[[J2000]]|constellation name=[[Draco (constellation)|Draco]]|ra={{RA|17|15|22.99}}|dec={{DEC|+57|24|40.26}}|z=0.027303|h_radial_v=8,185 [[kilometer per second|km/s]]|dist_ly=392 [[light year|Mly]] (120.18 [[Megaparsecs|Mpc]])|appmag_b=14.2|type=cD;S0; PEG blazar|size={{convert|78.16|kpc|ly|-2|abbr=off}}<br />([[diameter]]; [[2MASS]] K-band total isophote)<ref name=ned />|names=[[Principal Galaxies Catalogue|PGC]] 59947, [[Uppsala General Catalogue|UGC]] 10784, [[Catalogue of Galaxies and of Clusters of Galaxies|CGCG]] 299-066, [[Morphological Catalogue of Galaxies|MCG]] +10-24-116, WBL 6356-002}}
'''NGC 6338''' is a large [[lenticular galaxy]] located in the constellation [[Draco (constellation)|Draco]]. It is located at an estimated distance of 392 million [[Light-year|light years]] from [[Earth]]<ref name="ned">{{Cite web |title=By Name NASA/IPAC Extragalactic Database |url=http://ned.ipac.caltech.edu/byname?objname=NGC+6338&hconst=67.8&omegam=0.308&omegav=0.692&wmap=4&corr_z=1 |access-date=2024-10-13 |website=ned.ipac.caltech.edu}}</ref> 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."<ref>{{Cite web |title=New General Catalog Objects: NGC 6300 - 6349 |url=https://cseligman.com/text/atlas/ngc63.htm#6338 |access-date=2024-10-13 |website=cseligman.com}}</ref>
== Characteristics ==
NGC 6338 is the [[brightest cluster galaxy]] in the NGC 6338 group, shown merging with another galaxy group.<ref name=":0">{{Cite journal |last1=Schellenberger |first1=Gerrit |last2=O’Sullivan |first2=Ewan |last3=Giacintucci |first3=Simona |last4=Vrtilek |first4=Jan |last5=David |first5=Laurence P. |last6=Combes |first6=Francoise |last7=Bîrzan |first7=Laura |last8=Pan |first8=Hsi-An |last9=Lin |first9=Lihwai |date=2023-05-01 |title=Feedback in the Extremely Violent Group Merger NGC 6338 |journal=The Astrophysical Journal |volume=948 |issue=2 |pages=101 |doi=10.3847/1538-4357/acc52e |doi-access=free |arxiv=2303.08833 |bibcode=2023ApJ...948..101S |issn=0004-637X}}</ref><ref>{{Cite web |title=Chandra :: Photo Album :: NGC 6338 :: December 17, 2019 |url=https://chandra.harvard.edu/photo/2019/ngc6338/ |access-date=2024-10-13 |website=chandra.harvard.edu}}</ref> It forms a pair with MCG +10-24-117.<ref name=":1">{{Cite journal |last1=Pandge |first1=M. B. |last2=Vagshette |first2=N. D. |last3=David |first3=L. P. |last4=Patil |first4=M. K. |date=January 2012 |title=Systematic study of X-ray cavities in the brightest galaxy in the Draco constellation NGC 6338 |journal=Monthly Notices of the Royal Astronomical Society |volume=421 |issue=1 |page=808 |doi=10.1111/j.1365-2966.2011.20358.x |doi-access=free |arxiv=1202.1364 |bibcode=2012MNRAS.421..808P |issn=0035-8711}}</ref> It has an [[Ellipsoid|ellipsoidal]] appearance based on findings of a stellar component revolving around a [[Semi-major and semi-minor axes|major axis]].<ref name="10.1093_mnras/stz1711">{{Cite journal |last1=O’Sullivan |first1=Ewan |last2=Schellenberger |first2=Gerrit |last3=Burke |first3=D J |last4=Sun |first4=Ming |last5=Vrtilek |first5=Jan M |last6=David |first6=Laurence P |last7=Sarazin |first7=Craig |date=2019-06-24 |title=Building a cluster: shocks, cavities, and cooling filaments in the group–group merger NGC 6338 |journal=Monthly Notices of the Royal Astronomical Society |volume=488 |issue=2 |pages=2925–2946 |doi=10.1093/mnras/stz1711 |doi-access=free |issn=0035-8711|arxiv=1906.07710 }}</ref> NGC 6338 is also more luminous compared to other members with estimated [[Absolute magnitude|absolute magnitudes]] of M<sub>B</sub> = -22.2 and M<sub>V</sub> = -21.92. NGC 6338 also contains a central bright source when seen in [[X-ray astronomy|X-rays]].<ref name=":1" /> A double nucleus is present in NGC 6338.<ref>{{Cite journal |last1=Wang |first1=Yu |last2=Lui |first2=Fuyao |last3=Shen |first3=Zhiqiang |last4=Wang |first4=Jingying |last5=Hu |first5=Dan |last6=Xu |first6=Hai-Guang |date=2019-01-10 |title=Revealing a Head-on Major Merger in the Nearby NGC 6338 Group with Chandra and VLA Observations |journal=The Astrophysical Journal |volume=870 |issue=2 |pages=132 |doi=10.3847/1538-4357/aaf234 |doi-access=free |arxiv=1901.08769 |bibcode=2019ApJ...870..132W |issn=0004-637X}}</ref>
The nucleus of NGC 6338 is [[Active galactic nucleus|active]] and it is classified both a [[Low-ionization nuclear emission-line region|LINER]]<ref>{{Cite journal |last1=Gomes |first1=J.M. |last2=Papaderos |first2=P. |last3=Kehrig |first3=C. |last4=Vilchez |first4=J.M. |last5=Lehnert |first5=M.D. |last6=Sanchez |first6=S.F. |date=April 2016 |title=Warm ionized gas in CALIFA early-type galaxies 2D emission-line patterns and kinematics for 32 galaxies |url=https://www.aanda.org/articles/aa/pdf/2016/04/aa25976-15.pdf |journal=Astronomy & Astrophysics |volume=588 |issue=A68 |pages=58 |doi=10.1051/0004-6361/201525976|arxiv=1511.02191 |bibcode=2016A&A...588A..68G }}</ref> as well as a [[Fanaroff–Riley classification|Fanaroff-Riley class]] type 0 [[radio galaxy]].<ref>{{Cite journal |last1=Torresi |first1=E |last2=Grandi |first2=P |last3=Capetti |first3=A |last4=Baldi |first4=R D |last5=Giovannini |first5=G |date=2018-03-03 |title=X-ray study of a sample of FR0 radio galaxies: unveiling the nature of the central engine |journal=Monthly Notices of the Royal Astronomical Society |volume=476 |issue=4 |pages=5535–5547 |doi=10.1093/mnras/sty520 |doi-access=free |issn=0035-8711|arxiv=1802.08581 }}</ref>  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 galaxy|radio lobes]], with radiative ages of 200 and 50 million years old. It also has a small parsec-scale [[Astrophysical jet|radio jet]] with radio emission in its core.<ref name=":0" /> There are also X-ray cavities located both northeast and southwest of the galaxy's nucleus.<ref name=":1" />
Based on [[Narrow-band imaging|narrow band imaging]] taken with [[Hubble Space Telescope]], NGC 6338 contains [[Hydrogen-alpha|Hα]] emission originating from two compact clouds in its [[Galactic Center|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<sup>-14</sup> [[erg]] s<sup>-1</sup> cm<sup>-2</sup>.<ref name="10.1093_mnras/stz1711"/>
== References ==
<references />
== External links ==
{{WikiSky}}
*[https://simbad.u-strasbg.fr/simbad/sim-id?Ident=NGC%206338 NCG 6338 on SIMBAD]
{{Ngc65}}
{{Draco (constellation)}}
[[Category:NGC objects|6338]]
[[Category:Lenticular galaxies]]
[[Category:Draco (constellation)]]
[[Category:Principal Galaxies Catalogue objects|059947]]
[[Category:Astronomical objects discovered in 1789]]
[[Category:Discoveries by William Herschel]]
[[Category:Radio galaxies]]
[[Category:LINER galaxies]]
[[Category:Blazars]]
[[Category:Active galaxies]]
[[Category:UGC objects|10784]]
[[Category:MCG objects|+10-24-116]]