Toward understanding of the origin of the B[e] phenomenon in FS CMa type objects
Abstract
Large amounts of circumstellar material accompany lives of most stars at different evolutionary stages. Formation mechanisms of these, often disk-like envelopes are not always clear. The B[e] phenomenon includes the presence of permitted and forbidden line emission and strong infrared (IR) excess in radiation observed from stars of the B and early-A types. It is found in several groups of mostly binary systems. The recently defined FS CMa group is thought to have their gas-and-dust disks due to an earlier strong mass-transfer between the binary system components. FS CMa objects seem to possess longliving disks, whose properties have not been studied well. I will be reviewing the group properties and results of a long-term monitoring program of some of its members with a focus on detected variations of the brightness and spectrum.
- Publication:
-
Communications of the Byurakan Astrophysical Observatory
- Pub Date:
- December 2018
- DOI:
- 10.52526/25792776-2018.2.2-184
- Bibcode:
- 2018CoBAO..65..184M