The molecular clump towards the eastern border of SNR G18.8+0.3

Aims. The eastern border of the SNR G18.8+0.3, close to an HII regions complex, is a very interesting region for studying the molecular gas that it is probably in contact with the supernova remnant (SNR) shock front. Methods. We observed this region using the Atacama Submillimeter Telescope Experime...

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Detalles Bibliográficos
Publicado:	2012
Materias:	ISM: clouds ISM: supernova remnants Stars: formation Angular resolution Archival data Atacama H II regions ISM : clouds Molecular clouds Molecular clumps Molecular gas Radio continuum Shock fronts Submillimeters Supernova remnants Young stellar objects Shock waves Stars
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v547_n_p_Paron http://hdl.handle.net/20.500.12110/paper_00046361_v547_n_p_Paron
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_00046361_v547_n_p_Paron
record_format	dspace
spelling	paper:paper_00046361_v547_n_p_Paron2023-06-08T14:28:01Z The molecular clump towards the eastern border of SNR G18.8+0.3 ISM: clouds ISM: supernova remnants Stars: formation Angular resolution Archival data Atacama H II regions ISM : clouds ISM: supernova remnants Molecular clouds Molecular clumps Molecular gas Radio continuum Shock fronts Stars: formation Submillimeters Supernova remnants Young stellar objects Shock waves Stars Aims. The eastern border of the SNR G18.8+0.3, close to an HII regions complex, is a very interesting region for studying the molecular gas that it is probably in contact with the supernova remnant (SNR) shock front. Methods. We observed this region using the Atacama Submillimeter Telescope Experiment (ASTE) in the 12CO J = 3-2, 13CO J = 3-2, HCO +J = 4-3, and CS J = 7-6 lines with an angular resolution of 22′′. To complement these observations, we analyzed infrared, submillimeter, and radio continuum archival data. Results. In this work, we clearly show that the radio continuum "protrusion" that was earlier thought to belong to the SNR is an HII region complex that is deeply embedded in a molecular clump. The new molecular observations reveal that this dense clump, belonging to an extended molecular cloud that surrounds the SNR's southeast border, is not physically in contact with SNR G18.8+0.3, suggesting that the SNR shock front has not yet reached it or that they may be located at different distances. We found some young stellar objects embedded in the molecular clump, suggesting that their formation should be approximately coeval with the SN explosion. © 2012 ESO. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v547_n_p_Paron http://hdl.handle.net/20.500.12110/paper_00046361_v547_n_p_Paron
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	ISM: clouds ISM: supernova remnants Stars: formation Angular resolution Archival data Atacama H II regions ISM : clouds ISM: supernova remnants Molecular clouds Molecular clumps Molecular gas Radio continuum Shock fronts Stars: formation Submillimeters Supernova remnants Young stellar objects Shock waves Stars
spellingShingle	ISM: clouds ISM: supernova remnants Stars: formation Angular resolution Archival data Atacama H II regions ISM : clouds ISM: supernova remnants Molecular clouds Molecular clumps Molecular gas Radio continuum Shock fronts Stars: formation Submillimeters Supernova remnants Young stellar objects Shock waves Stars The molecular clump towards the eastern border of SNR G18.8+0.3
topic_facet	ISM: clouds ISM: supernova remnants Stars: formation Angular resolution Archival data Atacama H II regions ISM : clouds ISM: supernova remnants Molecular clouds Molecular clumps Molecular gas Radio continuum Shock fronts Stars: formation Submillimeters Supernova remnants Young stellar objects Shock waves Stars
description	Aims. The eastern border of the SNR G18.8+0.3, close to an HII regions complex, is a very interesting region for studying the molecular gas that it is probably in contact with the supernova remnant (SNR) shock front. Methods. We observed this region using the Atacama Submillimeter Telescope Experiment (ASTE) in the 12CO J = 3-2, 13CO J = 3-2, HCO +J = 4-3, and CS J = 7-6 lines with an angular resolution of 22′′. To complement these observations, we analyzed infrared, submillimeter, and radio continuum archival data. Results. In this work, we clearly show that the radio continuum "protrusion" that was earlier thought to belong to the SNR is an HII region complex that is deeply embedded in a molecular clump. The new molecular observations reveal that this dense clump, belonging to an extended molecular cloud that surrounds the SNR's southeast border, is not physically in contact with SNR G18.8+0.3, suggesting that the SNR shock front has not yet reached it or that they may be located at different distances. We found some young stellar objects embedded in the molecular clump, suggesting that their formation should be approximately coeval with the SN explosion. © 2012 ESO.
title	The molecular clump towards the eastern border of SNR G18.8+0.3
title_short	The molecular clump towards the eastern border of SNR G18.8+0.3
title_full	The molecular clump towards the eastern border of SNR G18.8+0.3
title_fullStr	The molecular clump towards the eastern border of SNR G18.8+0.3
title_full_unstemmed	The molecular clump towards the eastern border of SNR G18.8+0.3
title_sort	molecular clump towards the eastern border of snr g18.8+0.3
publishDate	2012
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v547_n_p_Paron http://hdl.handle.net/20.500.12110/paper_00046361_v547_n_p_Paron
_version_	1768543971549642752

The molecular clump towards the eastern border of SNR G18.8+0.3

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