Gas and dust in the inner disk of the Herbig Ae star MWC 758

Abstract

In this Letter 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 (R=35) AMBER/VLTI interferometric observations both in the H ($1.7\mu$m) and K ($2.2\mu$m) 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.

Accepted for publication in A&A

References in corpus (6)

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• Spatially resolving the hot CO around the young Be star 51 Ophiuchi
• The asymmetric inner disk of the Herbig Ae star HD 163296 in the eyes of VLTI/MATISSE: evidence for a vortex?
• Circumstellar disks and planets. Science cases for next-generation optical/infrared long-baseline interferometers
• A low optical depth region in the inner disk of the HerbigAe star HR5999
• Kinematical Constraint on Eccentricity in the Protoplanetary Disk MWC 758 with ALMA