AMBER/VLTI observations of the B[e] star MWC 300
Abstract
Aims: We study the enigmatic B[e] star MWC 300 to investigate its disk and binary with milli-arcsecond-scale angular resolution.
Methods: We observed MWC 300 with the VLTI/AMBER instrument in the H and K bands and compared these observations with temperature-gradient models to derive model parameters.
Results: The measured low visibility values, wavelength dependence of the visibilities, and wavelength dependence of the closure phase directly suggest that MWC 300 consists of a resolved disk and a close binary. We present a model consisting of a binary and a temperature-gradient disk that is able to reproduce the visibilities, closure phases, and spectral energy distribution. This model allows us to constrain the projected binary separation (~4.4 mas or ~7.9 AU), the flux ratio of the binary components (~2.2), the disk temperature power-law index, and other parameters.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- September 2012
- DOI:
- 10.1051/0004-6361/201219800
- arXiv:
- arXiv:1208.5882
- Bibcode:
- 2012A&A...545L..10W
- Keywords:
-
- stars: individual: MWC 300;
- binaries: general;
- circumstellar matter;
- techniques: interferometric;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- 4 pages, 1 figure, accepted by A&