Diferenzas entre revisións de «Galaxia irregular»

(traducido de en:Irregular galaxy)
 
== Tipos ==
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Therehai aretres threegrandes majortipos typesde ofgalaxias irregularirregulares, galaxiesque son:<ref>Gallagher, J. S. & Hunter, D. A. (1984). "Structure and Evolution of Irregular Galaxies." ''Annual Review of Astronomy and Astrophysics.'' '''22''': 37-74. {{doi|10.1146/annurev.aa.22.090184.000345}}</ref>
 
* AnGalaxia Irr-I galaxy ('''Irr I'''). isÉ anunha galaxia irregular galaxyque thatpresenta featuresalgunha someestrutura [[structure]]mais butnon nota enoughsuficiente tocomo placepara itsituala cleanlyfacilmente intona thesecuencia Hubblede sequenceHubble.
**Subtipos con algunhas estrutura espiral denominados glaxias [[espiral magallánica|Sm]].
**Subtypes with some spiral structure are called [[Magellanic spiral|Sm]] galaxies
**SubtypesSubtipos withoutsen spiralestrutura structureespiral aredenominados calledgalaxias '''Im''' galaxies.
* AnGalaxia Irr-II galaxy ('''Irr II'''). isÉ anunha galaxia irregular galaxyque thatparece doesnon notpresentar appearningunha toestrutura featureque anyse structurepoida thatencadrar canna placesecuencia it into thede Hubble sequence.
* Galaxia A dI-galaxy (orou '''dIrrs'''). isÉ aunha dwarf[[galaxia irregularanana]] galaxyirregular<ref>Grebel, Eva K. (2004). ''The evolutionary history of Local Group irregular galaxies.'' in McWilliam, Andrew; Rauch, Michael (eds) ''Origin and evolution of the elements.'' Cambridge University Press. p. 234-254. {{ISBN|978-0-521-75578-8}}.</ref> ThisAgora typecrese ofque galaxyeste istipo nowde thoughtgalaxia toé beimportante importantpara tocomprender understanda theevolución overallglobal evolutiondas of galaxiesgalaxias, asxa theyque tendadoitan toter haveun abaixo lownive level ofde [[metallicitymetalicidade]] ande relativelyniveis highrelativamente levelsaltos ofde gas, ande arecrese thoughtque toson besimilares similarás toprimeiras thegalaxias earliestque galaxiespoboaron thato populated the UniverseUniverso. TheyPoden mayrepresentar representunha aversión local (ande, thereforepor moretanto, recentmáis recente) version of thede [[Faintgalaxia blueazul galaxydébil|faintgalaxias blueazuis galaxiesdébiles]] knownque tose existsabe inque existen no [[HubbleCampo Ultra-DeepUltraprofundo Field|deepdo field galaxy surveysHubble]].
 
Algunhas das galaxias irregulares, especialmente do [[espiral magallánica|tipo magallánico]], son pequenas [[glaxia espiral|galaxias espirais]] que están sendo distorsionadas pola gravidade dun veciño máis grande.
Some of the irregular galaxies, especially of the [[Magellanic spiral|Magellanic type]], are small [[spiral galaxies]] that are being distorted by the gravity of a larger neighbor.
 
== Nubes de Magalláns ==
==Magellanic Clouds==
 
TheAs [[MagellanicNubes de CloudsMagalláns|Magellanicgalaxias Clouddas Nubes galaxiesde Magalláns]] wereforon oncealgunha classifiedvez asclasificadas irregularcomogalaxias galaxiesirregulares. TheA [[LargeGran MagellanicNube de CloudMagalláns]] hasfoi sincedespois beenreclasificada re-classifiedcomo asdo typetipo SBm ,<ref>Corso, G. and Buscombe, W. The Observatory, '''90''', 229 - 233 (1970) [http://adsabs.harvard.edu/full/1970Obs....90..229C On the spiral structure of the Large Magellanic Cloud]</ref> aque typeé ofun tipo de [[barredgalaxia spiralespiral galaxybarrada]], theo barredtipo [[Magellanicespiral spiralmagallánica]] typebarrada. TheA [[SmallPequena MagellanicNube Cloudde Magalláns]] remainssegue classifiedclasificada ascomo angalaxia irregular galaxyde of typetipo Im underna currentctual [[Galaxyclasificación morphologicalmorfolóxica classificationdas galaxias]], althoughaínda itque doescontén contain aunha [[Barredglaxia spiralespiral galaxybarrada|barestrutura structurebarrada]].
 
== GalleryGalería ==
<gallery>
FileFicheiro:Surveying the cosmos.jpg|[[ESO 486-21]] isé aunha spiralgalaxia galaxyespiral withcunha aestrutura somewhatalgo irregular ande ill-definedmal structuredefinida.<ref>{{cite web|title=Surveying the cosmos|url=https://www.spacetelescope.org/images/potw1725a/|website=www.spacetelescope.org|accessdate=19 June 2017}}</ref>
FileFicheiro:Spotlight on IC 3583.jpg|IrregularA galaxygalaxia irregular [[IC 3583]] has been found to haveten aunha barbarra ofde starsestrelas runningque throughdiscorre itspoloseu centercentro.<ref>{{cite web|title=Spotlight on IC 3583|url=https://www.spacetelescope.org/images/potw1648a/|website=www.spacetelescope.org|accessdate=28 November 2016}}</ref>
FileFicheiro:A lopsided lynx NGC 2337.jpg|[[NGC 2337]] isé anunha galaxia irregular galaxyque thatestá residessituada a 25 millionmillóns light-yearsde away[[ano inluz|anos theluz]] na constelación de [[Lynx (constellationconstelación)|constellation of Lynx]].<ref>{{cite web|title=A lopsided lynx|url=http://www.spacetelescope.org/images/potw1632a/|website=www.spacetelescope.org|accessdate=9 August 2016}}</ref>
FileFicheiro:A distinctly disorganised dwarf.jpg|[[UGC 4459]] isé anunha irregulargalxia dwarfanana irregular galaxysituada locateda approximatelyaproximadamente 11 millionmillóns light-yearsde awayanos inluz thena constellationconstelación ofda [[Ursa Major]].<ref>{{cite web|title=A distinctly disorganised dwarf|url=http://www.spacetelescope.org/images/potw1613a/|accessdate=29 March 2016}}</ref>
FileFicheiro:Meeting the neighbours.jpg|DwarfA irregulargalaxia galaxyanana known asirregular [[PGC 18431]].<ref>{{cite web|title=Meeting the neighbours|url=http://www.spacetelescope.org/images/potw1523a/|website=www.spacetelescope.org|publisher=ESA/Hubble|accessdate=8 June 2015}}</ref>
FileFicheiro:A spattering of blue.jpg|[[IC 559]] isclasifícase classifiedcomogalaxia asdo a typetipo Sm galaxy.<ref>{{cite web|title=A spattering of blue|url=http://www.spacetelescope.org/images/potw1436a/|website=www.spacetelescope.org|publisher=ESA/Hubble|accessdate=8 September 2014}}</ref>
FileFicheiro:A cosmic optical illusion.jpg|IrregularA dwarfgalxia galaxyanan irregular [[PGC 16389]] coverscobre a itssúa neighboringgalaxia galaxyveciña [[APMBGC 252+125-117]].<ref>{{cite news|title=A cosmic optical illusion|url=http://www.spacetelescope.org/images/potw1333a/|accessdate=20 August 2013|newspaper=ESA/Hubble Picture of the Week}}</ref>
</gallery>
 
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== Notas ==
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