K- and L- band spectroscopy of Be stars

We describe the behaviour of IR hydrogen emission lines of a sample of Be stars and discuss the physical properties of the circumstellar envelopes of Be stars classified in Groups I and II (Mennickent et al. 2009). We find that while Humphreys and Pfund lines of Group I stars form in an optically th...

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Detalles Bibliográficos
Autores principales: Granada, Anahí, Arias, María Laura, Cidale, Lydia Sonia, Mennickent, Ronald E.
Formato: Articulo Comunicacion
Lenguaje:Inglés
Publicado: 2011
Materias:
Ciencias Astronómicas
Ciencias Exactas
Be stars
Circumstellar matter
Stars: emission-line
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84051
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-84051
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Ciencias Exactas
Be stars
Circumstellar matter
Stars: emission-line
spellingShingle Ciencias Astronómicas
Ciencias Exactas
Be stars
Circumstellar matter
Stars: emission-line
Granada, Anahí
Arias, María Laura
Cidale, Lydia Sonia
Mennickent, Ronald E.
K- and L- band spectroscopy of Be stars
topic_facet Ciencias Astronómicas
Ciencias Exactas
Be stars
Circumstellar matter
Stars: emission-line
description We describe the behaviour of IR hydrogen emission lines of a sample of Be stars and discuss the physical properties of the circumstellar envelopes of Be stars classified in Groups I and II (Mennickent et al. 2009). We find that while Humphreys and Pfund lines of Group I stars form in an optically thick envelope/disk, Group II stars show Pfund lines that form in an optically thick medium and Humphreys lines originating in optically thinner regions. The transition between Groups I and II could be understood in terms of the evolution of the circumstellar disk of the star and might bring clues on the mechanism originating the Be phenomenon.
format Articulo
Comunicacion
author Granada, Anahí
Arias, María Laura
Cidale, Lydia Sonia
Mennickent, Ronald E.
author_facet Granada, Anahí
Arias, María Laura
Cidale, Lydia Sonia
Mennickent, Ronald E.
author_sort Granada, Anahí
title K- and L- band spectroscopy of Be stars
title_short K- and L- band spectroscopy of Be stars
title_full K- and L- band spectroscopy of Be stars
title_fullStr K- and L- band spectroscopy of Be stars
title_full_unstemmed K- and L- band spectroscopy of Be stars
title_sort k- and l- band spectroscopy of be stars
publishDate 2011
url http://sedici.unlp.edu.ar/handle/10915/84051
work_keys_str_mv AT granadaanahi kandlbandspectroscopyofbestars
AT ariasmarialaura kandlbandspectroscopyofbestars
AT cidalelydiasonia kandlbandspectroscopyofbestars
AT mennickentronalde kandlbandspectroscopyofbestars
bdutipo_str Repositorios
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