Artículo
Background galaxies as reddening probes throughout the Magellanic Clouds
Dutra, C. M.; Bica, Eduardo; Claria Olmedo, Juan Jose
; Piatti, Andres Eduardo
; Ahumada, Andrea Veronica
Fecha de publicación:
06/2001
Editorial:
EDP Sciences
Revista:
Astronomy and Astrophysics
ISSN:
0004-6361
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
We study the spectral properties in the range 3600 Å-6800 Å of the nuclear region of galaxies behind the Magellanic Clouds. The radial velocities clarified the nature of the objects as background galaxies or extended objects belonging to the Clouds. For most galaxies behind the main bodies of the LMC and SMC, radial velocities were measured for the first time. In the present sample typical LMC background galaxies are nearby (), while SMC's are considerably more distant (). We determine the reddening in each line of sight by matching a reddening-free galaxy template with comparable stellar population. For the LMC main body we derive a combined Milky Way and internal reddening value , while for the SMC . By subtracting Milky Way reddening values for galaxies projected onto the surroundings of each Cloud, we estimate average internal reddening values and 0.04, respectively for the main bodies of the LMC and SMC. The Clouds are optically thin, at least in the directions of the studied background galaxies which are often difficult to be identified as such on ESO/SERC sky survey images. Nevertheless, more reddened zones may occur where it is difficult to identify galaxies.
Palabras clave:
Magellanic Clouds
,
Galaxies
,
Spectroscopy
,
Interstellar Reddening
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Colecciones
Articulos(CCT - CORDOBA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - CORDOBA
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - CORDOBA
Articulos(IAFE)
Articulos de INST.DE ASTRONOMIA Y FISICA DEL ESPACIO(I)
Articulos de INST.DE ASTRONOMIA Y FISICA DEL ESPACIO(I)
Citación
Dutra, C. M.; Bica, Eduardo; Claria Olmedo, Juan Jose; Piatti, Andres Eduardo; Ahumada, Andrea Veronica; Background galaxies as reddening probes throughout the Magellanic Clouds; EDP Sciences; Astronomy and Astrophysics; 371; 3; 6-2001; 895-907
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