Integral field near-infrared spectroscopy of II Zw 40

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dc.contributor.authorVanzi, L.
dc.contributor.authorCresci, G.
dc.contributor.authorTelles, E.
dc.contributor.authorMelnick, J.
dc.date.accessioned2024-01-10T13:13:57Z
dc.date.available2024-01-10T13:13:57Z
dc.date.issued2008
dc.description.abstractWe present integral field spectroscopy in the near-infrared of the nearby starburst galaxy II Zw 40. Our new observations provide an unprecedented detailed view of the interstellar medium and star formation of this galaxy. The radiation emitted by the galaxy is dominated by a giant HII region, which extends over an area of more than 400 pc in size. A few clusters are present in this area, however, one, in particular, appears to be the main source of ionizing photons. We derive the properties of this object and compare them with those of the 30 Doradus cluster in the Large magellanic cloud (LMC). We study the spatial distribution and velocity field of different components of the inetrstellar medium (ISM), mostly through the Bracket series lines, the molecular hydrogen spectrum, and [FeII]. We find that [FeII] and H-2 are mostly photon excited, but while the region emitting [FeII] is almost coincident with the giant HII region observed in the lines of atomic H and He, the H-2 has a quite different distribution in space and velocity. The age of the stellar population in the main cluster is such that no supernova (SN) should be present yet so that the gas kinematics must be dominated by the young stars. We do not see, in the starbursting region, any geometrical or dynamical structure that can be related to the large scale morphology of the galaxy.
dc.fechaingreso.objetodigital2024-05-02
dc.format.extent11 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1051/0004-6361:20078885
dc.identifier.issn1432-0746
dc.identifier.urihttps://doi.org/10.1051/0004-6361:20078885
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/78357
dc.identifier.wosidWOS:000257551800009
dc.information.autorucIngeniería;Vanzi L;S/I;1006591
dc.issue.numero2
dc.language.isoen
dc.nota.accesocontenido parcial
dc.pagina.final403
dc.pagina.inicio393
dc.publisherEDP SCIENCES S A
dc.revistaASTRONOMY & ASTROPHYSICS
dc.rightsacceso restringido
dc.subjectgalaxies : dwarf
dc.subjectgalaxies : individual : II Zw 40
dc.subjectgalaxies : starburst
dc.subjectISM : HII regions
dc.subjectCOMPACT DWARF GALAXIES
dc.subjectBLUE COMPACT
dc.subjectSTAR-FORMATION
dc.subjectSUPERNOVA-REMNANTS
dc.subjectFE II
dc.subjectDISTANCE INDICATORS
dc.subjectIONIZING CLUSTER
dc.subject30 DORADUS
dc.subjectH-I
dc.subjectEMISSION
dc.titleIntegral field near-infrared spectroscopy of II Zw 40
dc.typeartículo
dc.volumen486
sipa.codpersvinculados1006591
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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