An Inner Gaseous Disk around the Herbig Be Star MWC 147
Abstract
We present high-spectral-resolution, optical spectra of the Herbig Be star MWC 147, in which we spectrally resolve several emission lines, including the [O I] lines at 6300 and 6363\deg. Their highly symmetric, double-peaked line profiles indicate that the emission originates in a rotating circumstellar disk. We deconvolve the Doppler-broadened [O I] emission lines to obtain a measure of emission as a function of distance from the central star. The resulting radial surface brightness profiles are in agreement with a disk structure consisting of a flat, inner, gaseous disk and a flared, outer, dust disk. The transition between these components at 2 to 3 AU corresponds to the estimated dust sublimation radius. The width of the double-peaked Mg II line at 4481\deg suggests that the inner disk extends to at least 0.10 AU, close to the corotation radius.
Keywords
Cite
@article{arxiv.1010.1414,
title = {An Inner Gaseous Disk around the Herbig Be Star MWC 147},
author = {T. Bagnoli and R. van Lieshout and L. B. F. M. Waters and G. van der Plas and B. Acke and H. van Winckel and G. Raskin and P. D. Meerburg},
journal= {arXiv preprint arXiv:1010.1414},
year = {2015}
}
Comments
accepted for ApJ Letters (Oct. 2010)