Probing atmospheres and circumstellar environments of Be stars and evolved low mas...
Studying the Be star content of the young open cluster NGC 1850
Studying the Be Star Content of the Young Open Cluster NGC 1850
| Author(s): |
Mota, B. C.
;
Carciofi, A. C.
;
Bednarski, D.
;
Rivinius, Th
;
Sigut, TAA
;
Jones, CE
Total Authors: 6
|
| Document type: | Journal article |
| Source: | BRIGHT EMISSARIES: BE STARS AS MESSENGERS OF STAR-DISK PHYSICS; v. 506, p. 4-pg., 2016-01-01. |
| Abstract | |
Classical Be stars are the only Main Sequence stars that possess Keplerian decretion circumstellar disks ruled by viscous processes. The physical properties of the disk can be studied by modeling its structure and solving the radiative transfer problem. In this point, the production of synthetic observables arises as a tool to investigate the physical quantities of the system. Among the proposed models to the disk formation, the Viscous Decretion Disk model is the current paradigm, correctly describing a large set of evidences that implies viscous shear is the mechanism driving the disk outflow. In this work we present an analysis of the circumstellar disk of one of the most observed Be stars, a Arae, based on the Viscous Decretion Disk paradigm. Our main objective is to demonstrate a circumstellar disk is sufficient to explain all the available observations, and to derive what are the physical properties of this disk. Our preliminary results suggest a disk with a moderate density (1.0 x 10(-13) cm(-3)) viewed at 45 deg. Furthermore, the modeling of SED, in particular in the UV domain, allowed us to revisit some of the stellar parameters listed in the literature. (AU) | |
| FAPESP's process: | 09/54006-4 - A computer cluster for the Astronomy Department of the University of São Paulo Institute of Astronomy, Geophysics and Atmospheric Sciences and for the Cruzeiro do Sul University Astrophysics Center |
| Grantee: | Elisabete Maria de Gouveia Dal Pino |
| Support Opportunities: | Multi-user Equipment Program |