Unveiling the structure and kinematics of B[e] supergiants' disks from FEROS and CRIRES spectra

MURATORE, M. F.; DE WIT, W. J.; KRAUS, M.; ARET, A.; CIDALE, L. S.; BORGES FERNANDES, M.; OUDMAIJER, R. D.; WHEELWRIGHT, H. E.

Foz do Iguaçu

Workshop; ESO Workshop: Circumstellar Dynamics at High Resolution; 2012

European Southern Observatory; Universidade de São Paulo

We are investigating the circumstellar material for a sample of B[e] stars using high spectral resolution data taken in the optical and near-infrared regions with ESO/FEROS and ESO/CRIRES spectrographs, respectively. B[e] stars are surrounded by dense disks of still unknown origin. While optical emission lines from [O I] and [Ca II] reflect the disk conditions close to the star (few stellar radii), the near-infrared data, especially the CO band emission, mirror the characteristics in the molecular part of the disk farther away from the star (several AU). Based on our high resolution spectroscopic data, we seek to derive the density and temperature structure of the disks, as well as their kinematics. This will allow us to obtain a better understanding of their structure, formation history and evolution. Here we present our preliminary results.