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- W2183996552 abstract "The morphology of the material surrounding Her- big Ae/Be stars is still a topic of debate. Distinct models with different geometry and optical thickness are found to be com- patible with the observed IR excess. This indicates that it is not possible to resolve this question by only looking at the fluxes. Therefore,thispapercomparesthreeknownHerbigAe/Bestars with very similar energy distributions but with different photo- metric behaviour, showing different spectral line proles and circumstellar extinction. These three Herbig Ae/Be stars are studied both photometrically and spectroscopically. It is found that the parameters from the Kurucz atmosphere model, tting theirspectralenergydistributions,areveryalike.Notwithstand- ing this similarity in spectral energy distribution, HD 142666 has several indications of CS material in the line of sight, while HD 139614 and HD 144432 do not show any of these indica- tions. Therefore the inner dust shell of these stars is assumed to be not spherical, but rather flattened. The observed differences are then interpreted as a difference in CS disk inclination with respect to the observer. As a result, it is concluded that at least some of the Herbig Ae/Be stars are surrounded by disks and also that modeling energy distributions should be done while having other restraining observations in mind." @default.
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- W2183996552 date "1998-01-01" @default.
- W2183996552 modified "2023-09-25" @default.
- W2183996552 title "HD139614, HD142666 and HD144432: evidence for circumstellar disks ?" @default.
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