Integral-field near-infrared spectroscopy of two blue dwarf galaxies: NGC 5253 and He 2-10

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dc.contributor.authorCresci, G.
dc.contributor.authorVanzi, L.
dc.contributor.authorSauvage, M.
dc.contributor.authorSantangelo, G.
dc.contributor.authorvan der Werf, P.
dc.date.accessioned2024-01-10T12:39:47Z
dc.date.available2024-01-10T12:39:47Z
dc.date.issued2010
dc.description.abstractWe present integral field spectroscopy in the near infrared (NIR) of He 2-10 and NGC 5253, two well known nearby dwarf irregular galaxies showing high star-formation rates. Our data provide an unprecedented detailed view of the interstellar medium and star formation in these galaxies, allowing us to obtain spatially resolved information from the NIR emission and absorption line tracers. We study the spatial distribution and kinematics of different components of the interstellar medium ( ISM) mostly through the Bracket series lines, the molecular hydrogen spectrum, [FeII] emission, and CO absorptions. Although the ISM is mostly photo-excited, as derived by the [FeII]/Br gamma and H(2) line ratios, some regions corresponding to non-thermal radio sources show a [FeII]/Br gamma excess due to a significant contribution of SN driven shocks. In He 2-10 we find that the molecular gas clouds, as traced by CO(2-1) and H(2) infrared line, show consistent morphologies and velocities when studied with the two different tracers. Moreover, there is a clear association with the youngest super star clusters as traced by the ionized gas. In the same galaxy we observe a cavity depleted of gas, which is surrounded by some of the most active regions of star formation, that we interpret as a signature of feedback-induced star formation from older episodes of star formation. Finally, we measured high turbulence in the ISM of both galaxies, sigma similar to 30-80 km s(-1), driven by the high star-formation activity.
dc.description.funderNational Aeronautics and Space Administration
dc.description.funderBasal Center for Astrophisics and Associated Technologies
dc.description.funderCONICYT
dc.description.funderPUC
dc.description.funderESO-VLT
dc.fechaingreso.objetodigital2024-05-02
dc.format.extent10 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1051/0004-6361/201014864
dc.identifier.issn0004-6361
dc.identifier.urihttps://doi.org/10.1051/0004-6361/201014864
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/77235
dc.identifier.wosidWOS:000283064200046
dc.information.autorucIngeniería;Vanzi L;S/I;1006591
dc.language.isoen
dc.nota.accesocontenido parcial
dc.publisherEDP SCIENCES S A
dc.revistaASTRONOMY & ASTROPHYSICS
dc.rightsacceso restringido
dc.subjectgalaxies: dwarf
dc.subjectgalaxies: individual: He 2-10
dc.subjectgalaxies: individual: NGC 5253
dc.subjectgalaxies: ISM
dc.subjectgalaxies: starburst
dc.subjectSUPER-STAR-CLUSTERS
dc.subjectFE-II
dc.subjectSTARBURST GALAXIES
dc.subjectMICRON EMISSION
dc.subjectHII-REGIONS
dc.subjectSINS SURVEY
dc.subjectEVOLUTION
dc.subjectSINFONI
dc.subjectGAS
dc.subjectHENIZE-2-10
dc.titleIntegral-field near-infrared spectroscopy of two blue dwarf galaxies: NGC 5253 and He 2-10
dc.typeartículo
dc.volumen520
sipa.codpersvinculados1006591
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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