GSH 91.5+2-114: A large Hi shell in the outer part of the Galaxy

GSH 91.5 + 2 - 114 is a large Hi shell located in the outer Galaxy at a kinematic distance of about 15 kpc. It was first identified in the Canadian Galactic Plane Survey (CGPS) by Pineault et al. (2002, ASP Conf. Ser., 276, 332) as being possibly associated with objects possessing infrared colors, w...

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Detalles Bibliográficos
Publicado:	2010
Materias:	Galaxy: bulge ISM: bubbles ISM: kinematics and dynamics ISM: structure Galaxies Kinematics Stars A-thermal Canadian galactic plane surveys Combined actions Infrared color ISM: Kinematics and dynamics Massive stars Physical parameters Radio continuum Radio images Star formations Stellar wind Supernova explosion Shells (structures)
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v525_n7_p_Cichowolski http://hdl.handle.net/20.500.12110/paper_00046361_v525_n7_p_Cichowolski
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_00046361_v525_n7_p_Cichowolski
record_format	dspace
spelling	paper:paper_00046361_v525_n7_p_Cichowolski2023-06-08T14:27:55Z GSH 91.5+2-114: A large Hi shell in the outer part of the Galaxy Galaxy: bulge ISM: bubbles ISM: kinematics and dynamics ISM: structure Galaxies Kinematics Stars A-thermal Canadian galactic plane surveys Combined actions Galaxy: bulge Infrared color ISM: bubbles ISM: Kinematics and dynamics ISM: structure Massive stars Physical parameters Radio continuum Radio images Star formations Stellar wind Supernova explosion Shells (structures) GSH 91.5 + 2 - 114 is a large Hi shell located in the outer Galaxy at a kinematic distance of about 15 kpc. It was first identified in the Canadian Galactic Plane Survey (CGPS) by Pineault et al. (2002, ASP Conf. Ser., 276, 332) as being possibly associated with objects possessing infrared colors, which indicates strong stellar winds. The Hi shell has no obvious continuum counterpart in the CGPS radio images at 408 and 1420 MHz or in the IRAS images. We found no evidence for early-type massive stars, most likely as a result of the large extinction that is expected for this large distance. An analysis of the energetics and of the main physical parameters of the Hi shell shows that this shell is likely the result of the combined action of the stellar winds and supernova explosions of many stars. We investigate whether a number of slightly extended regions characterized by a thermal radio continuum and located near the periphery of the Hi shell could be the result of star formation triggered by the expanding shell. © 2010 ESO. 2010 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v525_n7_p_Cichowolski http://hdl.handle.net/20.500.12110/paper_00046361_v525_n7_p_Cichowolski
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Galaxy: bulge ISM: bubbles ISM: kinematics and dynamics ISM: structure Galaxies Kinematics Stars A-thermal Canadian galactic plane surveys Combined actions Galaxy: bulge Infrared color ISM: bubbles ISM: Kinematics and dynamics ISM: structure Massive stars Physical parameters Radio continuum Radio images Star formations Stellar wind Supernova explosion Shells (structures)
spellingShingle	Galaxy: bulge ISM: bubbles ISM: kinematics and dynamics ISM: structure Galaxies Kinematics Stars A-thermal Canadian galactic plane surveys Combined actions Galaxy: bulge Infrared color ISM: bubbles ISM: Kinematics and dynamics ISM: structure Massive stars Physical parameters Radio continuum Radio images Star formations Stellar wind Supernova explosion Shells (structures) GSH 91.5+2-114: A large Hi shell in the outer part of the Galaxy
topic_facet	Galaxy: bulge ISM: bubbles ISM: kinematics and dynamics ISM: structure Galaxies Kinematics Stars A-thermal Canadian galactic plane surveys Combined actions Galaxy: bulge Infrared color ISM: bubbles ISM: Kinematics and dynamics ISM: structure Massive stars Physical parameters Radio continuum Radio images Star formations Stellar wind Supernova explosion Shells (structures)
description	GSH 91.5 + 2 - 114 is a large Hi shell located in the outer Galaxy at a kinematic distance of about 15 kpc. It was first identified in the Canadian Galactic Plane Survey (CGPS) by Pineault et al. (2002, ASP Conf. Ser., 276, 332) as being possibly associated with objects possessing infrared colors, which indicates strong stellar winds. The Hi shell has no obvious continuum counterpart in the CGPS radio images at 408 and 1420 MHz or in the IRAS images. We found no evidence for early-type massive stars, most likely as a result of the large extinction that is expected for this large distance. An analysis of the energetics and of the main physical parameters of the Hi shell shows that this shell is likely the result of the combined action of the stellar winds and supernova explosions of many stars. We investigate whether a number of slightly extended regions characterized by a thermal radio continuum and located near the periphery of the Hi shell could be the result of star formation triggered by the expanding shell. © 2010 ESO.
title	GSH 91.5+2-114: A large Hi shell in the outer part of the Galaxy
title_short	GSH 91.5+2-114: A large Hi shell in the outer part of the Galaxy
title_full	GSH 91.5+2-114: A large Hi shell in the outer part of the Galaxy
title_fullStr	GSH 91.5+2-114: A large Hi shell in the outer part of the Galaxy
title_full_unstemmed	GSH 91.5+2-114: A large Hi shell in the outer part of the Galaxy
title_sort	gsh 91.5+2-114: a large hi shell in the outer part of the galaxy
publishDate	2010
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v525_n7_p_Cichowolski http://hdl.handle.net/20.500.12110/paper_00046361_v525_n7_p_Cichowolski
_version_	1768544470591078400

GSH 91.5+2-114: A large Hi shell in the outer part of the Galaxy

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