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Authordc.contributor.authorGuzmán Fernández, Andrés 
Authordc.contributor.authorGaray Brignardello, Guido 
Authordc.contributor.authorRodríguez, Luis F. 
Authordc.contributor.authorContreras, Yanett 
Authordc.contributor.authorDougados, Catherine 
Authordc.contributor.authorCabrit, Sylvie 
Cita de ítemdc.identifier.citationThe Astrophysical Journal, 826:208 (18pp), 2016 August 1es_ES
Abstractdc.description.abstractWe present radio continuum observations of the high-mass young stellar object (HMYSO) G345.4938+01.4677 obtained using the Australia Telescope Compact Array (ATCA) at 5, 9, 17, and 19 GHz. These observations provide definite evidence that the outer and inner pairs of radio lobes consist of shock-ionized material being excited by an underlying collimated and fast protostellar jet emanating from a hypercompact H II region. By comparing with images taken 6 years earlier at 5 and 9 GHz using the same telescope, we assess the proper motions (PMs) of the radio sources. The outer west and east lobes exhibit PMs of 64 +/- 12 and 48 +/- 13 mas yr(-1), indicating velocities projected in the plane of the sky and receding from G345.4938+01.4677 of 520 and 390 km s(-1), respectively. The internal radio lobes also display PM signals consistently receding from the HMYSO with magnitudes of 17 +/- 11 and 35 +/- 10 mas yr(-1) for the inner west and east lobes, respectively. The morphology of the outer west lobe is that of a detached bow shock. At 17 and 19 GHz, the outer east lobe displays an arcuate morphology also suggesting a bow shock. These results show that disk accretion and jet acceleration-possibly occurring in a very similar way compared with low-mass protostars-is taking place in G345.4938+01.4677 despite the presence of ionizing radiation and the associated hypercompact H II regiones_ES
Patrocinadordc.description.sponsorshipFONDECYT 3150570 CONICYT PFB-06es_ES
Type of licensedc.rightsAttribution-NonCommercial-NoDerivs 3.0 Chile*
Link to Licensedc.rights.uri*
Sourcedc.sourceThe Astrophysical Journales_ES
Keywordsdc.subjectISM: individual objects (G345.4938+01.4677)es_ES
Keywordsdc.subjectISM: jets and outflowses_ES
Keywordsdc.subjectRadio continuum: ISMes_ES
Keywordsdc.subjectStars: formationes_ES
Títulodc.titleA Protostellar Jet Emanating from a hypercompact H II Regiones_ES
Document typedc.typeArtículo de revistaes_ES
Indexationuchile.indexArtículo de publicación ISIes_ES

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Attribution-NonCommercial-NoDerivs 3.0 Chile
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 Chile