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Abstract:

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.

Registro:

Documento: Artículo
Título:GSH 91.5+2-114: A large Hi shell in the outer part of the Galaxy
Autor:Cichowolski, S.; Pineault, S.
Filiación:Instituto de Astronomía y Física Del Espacio (IAFE), CC 67, Suc. 28, 1428 Buenos Aires, Argentina
Département de Physique, De GéNie Physique et d'Optique, Université Laval, Québec, G1V 0A6, Canada
Instituto Argentino de Radioastronomía (IAR), CC 5, 1894, Villa Elisa, Argentina
Palabras clave: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)
Año:2010
Volumen:525
Número:7
DOI: http://dx.doi.org/10.1051/0004-6361/201015355
Título revista:Astronomy and Astrophysics
Título revista abreviado:Astron. Astrophys.
ISSN:00046361
CODEN:AAEJA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v525_n7_p_Cichowolski

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Citas:

---------- APA ----------
Cichowolski, S. & Pineault, S. (2010) . GSH 91.5+2-114: A large Hi shell in the outer part of the Galaxy. Astronomy and Astrophysics, 525(7).
http://dx.doi.org/10.1051/0004-6361/201015355
---------- CHICAGO ----------
Cichowolski, S., Pineault, S. "GSH 91.5+2-114: A large Hi shell in the outer part of the Galaxy" . Astronomy and Astrophysics 525, no. 7 (2010).
http://dx.doi.org/10.1051/0004-6361/201015355
---------- MLA ----------
Cichowolski, S., Pineault, S. "GSH 91.5+2-114: A large Hi shell in the outer part of the Galaxy" . Astronomy and Astrophysics, vol. 525, no. 7, 2010.
http://dx.doi.org/10.1051/0004-6361/201015355
---------- VANCOUVER ----------
Cichowolski, S., Pineault, S. GSH 91.5+2-114: A large Hi shell in the outer part of the Galaxy. Astron. Astrophys. 2010;525(7).
http://dx.doi.org/10.1051/0004-6361/201015355