Volume 483, Number 2, May IV 2008
|Page(s)||L13 - L16|
|Published online||08 April 2008|
Letter to the Editor
Gas and dust in the inner disk of the Herbig Ae star MWC 758 *
Osservatorio Astrofisico di Arcetri, INAF, Largo E. Fermi 5, 50125 Firenze, Italy
2 California Institute of Technology, MC 105-24, 1200 East California Blvd., Pasadena CA 91125, USA e-mail: firstname.lastname@example.org
3 Laboratoire d'Astrophysique de Grenoble, UMR 5571, Université Joseph Fourier/CNRS, BP 53, 38041 Grenoble Cedex 9, France
4 ESO, Karl-Schwarschild Strasse 2, 85748 Garching bei München, Germany
Accepted: 25 March 2008
We investigate the origin of the near-infrared emission of the Herbig Ae star MWC 758 on sub-astronomical unit (AU) scales using spectrally dispersed low resolution () AMBER/VLTI interferometric observations in the H (1.7 μm) and K (2.2 μm) bands. We find that the K band visibilities and closure phases are consistent with the presence of a dusty disk inner rim located at the dust evaporation distance (0.4 AU) while the bulk of the H band emission arises within 0.1 AU from the central star. Comparing the observational results with theoretical model predictions, we suggest that the H band emission is dominated by an hot gaseous accretion disk.
Key words: accretion, accretion disks / techniques: interferometric / stars: planetary systems: protoplanetary disks
© ESO, 2008
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