[{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","@id":"https:\/\/wiki.edu.vn\/en\/wiki24\/list-of-ring-galaxies-wikipedia\/#BlogPosting","mainEntityOfPage":"https:\/\/wiki.edu.vn\/en\/wiki24\/list-of-ring-galaxies-wikipedia\/","headline":"List of ring galaxies – Wikipedia","name":"List of ring galaxies – Wikipedia","description":"From Wikipedia, the free encyclopedia This is a list of ring galaxies. A ring galaxy, as the name suggests, is","datePublished":"2020-02-07","dateModified":"2020-02-07","author":{"@type":"Person","@id":"https:\/\/wiki.edu.vn\/en\/wiki24\/author\/lordneo\/#Person","name":"lordneo","url":"https:\/\/wiki.edu.vn\/en\/wiki24\/author\/lordneo\/","image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/c9645c498c9701c88b89b8537773dd7c?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/c9645c498c9701c88b89b8537773dd7c?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"Enzyklop\u00e4die","logo":{"@type":"ImageObject","@id":"https:\/\/wiki.edu.vn\/wiki4\/wp-content\/uploads\/2023\/08\/download.jpg","url":"https:\/\/wiki.edu.vn\/wiki4\/wp-content\/uploads\/2023\/08\/download.jpg","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/thumb\/9\/9c\/Sig06-005.jpg\/60px-Sig06-005.jpg","url":"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/thumb\/9\/9c\/Sig06-005.jpg\/60px-Sig06-005.jpg","height":"60","width":"60"},"url":"https:\/\/wiki.edu.vn\/en\/wiki24\/list-of-ring-galaxies-wikipedia\/","wordCount":4910,"articleBody":"From Wikipedia, the free encyclopediaThis is a list of ring galaxies. A ring galaxy, as the name suggests, is a disc or spiral galaxy with its galactic disc structured or distorted into a ring or torus-like appearance. Hoag’s Object, discovered by Art Hoag in 1950, is the prototypical example of a ring galaxy.Formation theories[edit]Ring galaxies are theorized to be formed through multiple possible situations:1. Bar instability \u2013 a phenomenon where the rotational velocity of the bar in a barred spiral galaxy increases to the point of spiral spin-out. Under typical conditions, gravitational density waves would favor the creation of spiral arms. When bar instability occurs, these density waves are instead migrated out into a ring-structure by the pressure, force, and gravitational influence of the byronic and dark matter furiously orbiting about the bar. This migration forces the stars, gas and dust found within the former arms into a torus-like region, forming a ring, and often igniting star formation.2. Galactic collisions- another observed way that ring galaxies can form is through the process of two or more galaxies colliding. The cartwheel galaxy, galaxy pair AM 2026-424, and Arp 147 are all examples of ring galaxies believed to be formed from this process. In pass-through galactic collisions, an often smaller galaxy will pass through the disc of an often larger spiral, causing an outward push of the arms, as if dropping a rock into a pond of still water. In side-swipe and head-on collisions, the appearance of a perfect ring are less likely, with chaotic and warped appearances dominating.3. Intergalactic medium accretion- this method has been inferred through the existence of Hoag’s object, along with UV observations of several other large and ultra-large super spiral galaxies and current formation theories of spiral galaxies. UV-light observations show several cases of faint, ring-like and spiral structures of hot young stars that have formed along the network of cooled inflowing gas, extending far from the visible luminous galactic disc. If conditions are favorable, a ring can form in the place of a spiral structure. Since some spiral galaxies are theorized to have formed from massive clouds of intergalactic gas collapsing and then rotationally forming into a disc structure, one could assume that a ring disc could form in place of a spiral disc if, as mentioned before, conditions are favorable. This holds true for protogalaxies, or galaxies just throughout to be forming, and old galaxies that has migrated into a section of space with a higher gas content than its previous locations.NameImageCatalogue numberDistanceNotesCartwheel GalaxyESO 350-40, PGC 2248500 Mlylenticular galaxyNGC 6028NGC 6028, NGC 6046, PGC 56716203 Mlybarred lenticular galaxyHoag’s ObjectPGC 54559, PRC D-51600 MlySDSS J151713.93+213516.8This galaxy can be seen behind Hoag’s ObjectAM 0644-741AM 0644-741300 MlyNGC 4909PGC 44949, ESO 269-035, MCG -07-27-028NGC 1291NGC 1291, NGC 1269,[1] PGC 01220933 MlyNGC 1512PGC 1439138 MlyGalaxy exhibits a double-ring structureNGC 1433PGC 1358649 Mlybarred spiral galaxy with ringNGC 1533NGC 1533, PGC 14582[2]62 \u00b1 4 Mly [3]lenticular galaxy with ring structureNGC 2859UGC 5001, PGC 2664982.8 Mlylenticular galaxy with ring structure[4]NGC 1350PGC 01305987.4 Mlyspiral galaxy with ring structureNGC 1386PGC 1333353 Mlyspiral galaxy with ring structureNGC 1387PGC 1334453 Mlylenticular galaxy with nuclear ringNGC 4622PGC 42701200 Mlyunbarred spiral galaxy with ringNGC 4777NGC 4777, PGC 43852180 MlyNGC 6861NGC 7217UGC 11914, PGC 6809650 Mlyunbarred spiral galaxy with ringESO 509-???098PGC 48609350 MlyII Zw 28[5]Zw II 28, 2MASX J05014205+0334278Mayall’s ObjectArp 148, VV 032, MCG+07-23-019, APG 148450 Mlycollisional ring galaxyI Zw 045[6]I Zw 045, NGC 4774366 Mlycollisional ring galaxyVII Zw 466[6]VII Zw 466, UGC 07683637 Mlycollisional ring galaxyUGC 459991 MlyArp 10[6]  Arp 10, UGC 01775, 2MASX J02182639+0539139[7]400 Mlycollisional ring galaxyArp 146PGC 5091050 Mlyinteracting pairArp 147IC 298430 Mlyinteracting pairNGC 4650APGC 42951126 Mlypolar ring galaxyNGC 660polar ring galaxyNGC 922ESO 478-28, ISG 10150 Mlycollisional ring galaxyESO 198-13PGC 9463240 Mlythree ring structuresLEDA 1000714PGC 1000714, 6dFGS gJ112316.4-084007, 2MASX J11231643-0840067360 Mlytwo nearly round rings, but with different characteristicsNGC 985VV 285, Mrk 1048, MCG -02-07-035, PGC 9817567 Mlycollisional ring galaxyNGC 1142NGC 1144, UGC 2389, Arp 118, VV 331a, Mrk 1504, CGCG 389-046, MCG +00-08-048, PGC 11012375 MlySeyfert galaxyNGC 3081IC 2529, ESO 499-G31, AM 0957-223, MCG -04-24-012, PGC 2887683 Mlybarred lenticular galaxyNGC 3821CGCG 127-32, MCG 4-28-30, PGC 36314, UGC 6663271 Mlylow surface brightness galaxyNGC 4513CGCG 315-42, MCG 11-15-59, PGC 41527, UGC 7683110 Mlylenticular galaxyNGC 7020NGC 7021, ESO 107-13, PGC 66291138 Mlybarred lenticular galaxyNGC 7098ESO 48-5, IRAS 21393-7520, PGC 6726695 Mlydouble barred spiral galaxyNGC 7552IC 5294, ESO 291- G 012, VV 440, PGC 7088456 Mlybarred spiral galaxyNGC 7742UGC 12760,[2] MCG +02-60-010,[2] UZC J234415.8+104601,[2] 2MASX J23441571+104601572 MlyUnbarred spiral galaxy with ring, Seyfert galaxyWISEA J033303.20-275041.5  1790 MlyDiscovered in the Hubble Legacy FieldSee also[edit]References[edit]^ “NGC 1291”. Capella Observatory. 2005. Retrieved April 1, 2012.^ “Results for NGC 1533”. NASA\/IPAC Extragalactic Database. Retrieved 2008-06-26.^ Ryan-Weber, Emma; Webster, Rachel; Bekki, Kenji (April 2003).  Jessica L. Rosenberg; Mary E. Putman (eds.). Galactic Recycling: The HI Ring Around NGC 1533. The IGM\/Galaxy Connection: The Distribution of Baryons at Z=0, ASSL Conference Proceedings. Vol.\u00a0281. Dordrecht: Kluwer Academic Publishers. p.\u00a0223. arXiv:astro-ph\/0209321. Bibcode:2003ASSL..281..223R. doi:10.1007\/978-94-010-0115-1_40. ISBN\u00a01-4020-1289-6. S2CID\u00a016899046.^ “Lenticular Galaxy (NGC 2859)”. Calvin College. Retrieved July 28, 2013.^ “Hubble Gazes on One Ring to Rule Them All”. NASA. March 15, 2013. Retrieved July 28, 2013.^ a b c Appleton, P. N.; Struck-Marcell, Curtis (1996). “Collisional Ring Galaxies”. Fundamentals of Cosmic Physics. 16: 111\u2013220. Bibcode:1996FCPh…16..111A. Retrieved July 29, 2013.^ “UGC 1775”. SIMBAD. Centre de donn\u00e9es astronomiques de Strasbourg. Retrieved July 29, 2013.  "},{"@context":"http:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"https:\/\/wiki.edu.vn\/en\/wiki24\/#breadcrumbitem","name":"Enzyklop\u00e4die"}},{"@type":"ListItem","position":2,"item":{"@id":"https:\/\/wiki.edu.vn\/en\/wiki24\/list-of-ring-galaxies-wikipedia\/#breadcrumbitem","name":"List of ring galaxies – Wikipedia"}}]}]