The Intermittently Embedded Herbig Ae/Be Stars ISO and Ground-Based IR Observations
Sitko, M. L.; Grady, C. A.; Grinin, V. P.; de Winter, D.; Bjorkman, K. S.; Hanner, M. S.; Lynch, D. K.; Russell, R. W.; Pérez, M. R.; Thé, P. S.
United States, Netherlands, Spain, Ukraine
Abstract
We discuss silicate emission profiles observed with the ISO SWS and ground-based IR observations in a population of intermittently embedded Herbig Ae/Be stars which are viewed edge-on to their polarimetrically identified dust and gas disks. The ISO SWS observations confirm the lack of a simple correlation between system age and the profile shape. Comparison with laboratory silicates suggests that much of the observed variation is due to different annealing histories of the grains.