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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Autores principales: Cichowolski, S., Pineault, S.
Formato: JOUR
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: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 todo:paper_00046361_v525_n7_p_Cichowolski
record_format dspace
spelling todo:paper_00046361_v525_n7_p_Cichowolski2023-10-03T14:00:33Z GSH 91.5+2-114: A large Hi shell in the outer part of the Galaxy Cichowolski, S. Pineault, S. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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)
Cichowolski, S.
Pineault, S.
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.
format JOUR
author Cichowolski, S.
Pineault, S.
author_facet Cichowolski, S.
Pineault, S.
author_sort Cichowolski, S.
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
url http://hdl.handle.net/20.500.12110/paper_00046361_v525_n7_p_Cichowolski
work_keys_str_mv AT cichowolskis gsh9152114alargehishellintheouterpartofthegalaxy
AT pineaults gsh9152114alargehishellintheouterpartofthegalaxy
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