HVC131+1-200: A collision of a high-velocity cloud with the galactic plane

We report HI observations from Effeisberg, using the 100-m radiotelescope of the Max-Planck Institut fur Radioastronomie, which show evidences of a High Velocity Cloud (HVC) - Galaxy collision, in a region around l = 131°, b = +1°. They show a) a HVC, named HVC131 +1-200; b) a hole in the gas distri...

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Detalles Bibliográficos
Autores principales: Morras, Ricardo, Arnal, Edmundo Marcelo, Bajaja, Esteban
Formato: Articulo Comunicacion
Lenguaje:Español
Publicado: 1992
Materias:
Astronomía
Galaxia
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/146320
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-146320
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Español
topic Astronomía
Galaxia
spellingShingle Astronomía
Galaxia
Morras, Ricardo
Arnal, Edmundo Marcelo
Bajaja, Esteban
HVC131+1-200: A collision of a high-velocity cloud with the galactic plane
topic_facet Astronomía
Galaxia
description We report HI observations from Effeisberg, using the 100-m radiotelescope of the Max-Planck Institut fur Radioastronomie, which show evidences of a High Velocity Cloud (HVC) - Galaxy collision, in a region around l = 131°, b = +1°. They show a) a HVC, named HVC131 +1-200; b) a hole in the gas distribution at velocities around v ≃ -12 km/s; c) a HI shell surrounding the hole and d) intermediate velocity gas in the velocity range -30 < v < -25 km/s. All these features are found in the same region of the sky We believe that a possible interpretation for all these phenomena is that they were produced by a collision of HVC131 +1-200 with the galactic plane. The consequences of such a collision, predicted by several authors (Tenorio-Tagle, 1987; Meyerdierks, 1991; Comeron & Torra, 1992), are the formation of a) a forward shock moving into the galactic gas ahead; b) a dense layer of shocked gas between the HVC and the galactic gas; and c) a cavity which, due to the thermal energy originated in the forward shock, will be filled with hot low-density gas and will expand laterally. All these effects are present in the studied region in the form of the mentioned features.
format Articulo
Comunicacion
author Morras, Ricardo
Arnal, Edmundo Marcelo
Bajaja, Esteban
author_facet Morras, Ricardo
Arnal, Edmundo Marcelo
Bajaja, Esteban
author_sort Morras, Ricardo
title HVC131+1-200: A collision of a high-velocity cloud with the galactic plane
title_short HVC131+1-200: A collision of a high-velocity cloud with the galactic plane
title_full HVC131+1-200: A collision of a high-velocity cloud with the galactic plane
title_fullStr HVC131+1-200: A collision of a high-velocity cloud with the galactic plane
title_full_unstemmed HVC131+1-200: A collision of a high-velocity cloud with the galactic plane
title_sort hvc131+1-200: a collision of a high-velocity cloud with the galactic plane
publishDate 1992
url http://sedici.unlp.edu.ar/handle/10915/146320
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AT arnaledmundomarcelo hvc1311200acollisionofahighvelocitycloudwiththegalacticplane
AT bajajaesteban hvc1311200acollisionofahighvelocitycloudwiththegalacticplane
bdutipo_str Repositorios
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