AMBER/VLTI Observations of the B[e] Star MWC 300

UNCG Author/Contributor (non-UNCG co-authors, if there are any, appear on document)
Anatoly S. Miroshnichenko, Professor (Creator)
The University of North Carolina at Greensboro (UNCG )
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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.

Additional Information

Astronomy & Astrophysics, vol. 545
Language: English
Date: 2012
stars: individual: MWC 300, binaries: general, circumstellar matter, techniques: interferometric

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