Warm water vapor envelope in the supergiants α Ori and α Her and its effects on the apparent size from the near-infrared to the mid-infrared

Resultado de la investigación: Contribución a una revistaArtículo de la conferenciarevisión exhaustiva

Resumen

We present a possible interpretation for the increase of the angular diameter of the supergiants α Ori and α Her from the K band to the 11 μm region revealed by the recent interferometric observations using narrow band-passes where no salient spectral feature is present (Weiner et al. 2003a). Our simple model for the warm water vapor envelope can reproduce the angular diameters observed with Infrared Spatial Interferometer as well as the high-resolution TEXES spectra obtained in the 11 μm region. The warm water vapor layers are optically thick in the lines, and therefore, strong absorption due to H2O can be expected from such a dense water vapor envelope. However, the absorption lines are filled in by emission from the extended part of the envelope, and this results in the high-resolution 11 μm spectra which exhibit only weak, fine spectral features, masking the spectroscopic fingerprints of the dense, warm water vapor envelope. On the other hand, the presence of the warm water vapor envelope manifests itself as the larger angular diameters in the 11 μm region as compared to those measured in the near-infrared.

Idioma originalInglés
Páginas (desde-hasta)849-852
Número de páginas4
PublicaciónEuropean Space Agency, (Special Publication) ESA SP
N.º560 II
EstadoPublicada - 2005
Publicado de forma externa
Evento13th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun - Hamburg, Alemania
Duración: 5 jul 20049 jul 2004

Áreas temáticas de ASJC Scopus

  • Ingeniería aeroespacial
  • Ciencias planetarias y espacial

Huella

Profundice en los temas de investigación de 'Warm water vapor envelope in the supergiants α Ori and α Her and its effects on the apparent size from the near-infrared to the mid-infrared'. En conjunto forman una huella única.

Citar esto