The IR continuum of the Herbig Ae/Be stars as seen by the ISO spectrometers: a contribution to the modeling of the circumstellar environment.

Details The IR continuum of the Herbig Ae/Be stars as seen by the ISO spectrometers: a contribution to the modeling of the circumstellar environment. The IR continuum of the Herbig Ae/Be stars as seen by the ISO spectrometers: a contribution to the modeling of the circumstellar environment.

Feb 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003esasp.511..117e&link_type=abstract

Exploiting the ISO Data Archive. Infrared Astronomy in the Internet Age, held in Siguenza, Spain 24-27 June, 2002. Edited by

Astronomy and Astrophysics

Astronomy

Scientific paper

We present a study of the whole sample of the Herbig Ae/Be stars observed with the spectrometers (SWS+LWS) on board of the Infrared Space Observatory (ISO). These objects have been studied not only by considering their IR continuum emission but also taking into account all the available photometric data, collected from the optical region to the radio wavelengths. In this way their global spectral energy distributions (SEDs) have been compared with the results of the radiative transfer calculations in the context of a model for the circumstellar environment. Besides different density laws and dust types, this model considers also the possibility for the presence of:
1) different radial density distributions describing respectively the inner and outer regions of the envelope;
2) polar cavities that could be evacuated by the action of the stellar wind associated with the pre-main sequence phases.
We present the result of a selection for the best models which has been done by considering both the spectral fit to the observed SEDs and the consistency between the model parameters and the corresponding observable quantities as the spectral type, the distance and the extinction. A possible relationship is noted between the geometry of the CS matter distribution and the evolutive stage of the Herbig Ae/Be stars.

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