Dust Emission from Herbig Ae/Be stars - Evidence for Disks and Envelopes

Abstract

IR and mm-wave emission from Herbig Ae/Be stars has produced conflicting conclusions regarding the dust geometry in these objects. We show that the compact dimensions of the mm-wave emitting regions are a decisive indication for disks. But a disk cannot explain the spectral energy distribution (SED) unless it is embedded in an extended envelope that (1) dominates the IR emission and (2) provides additional disk heating on top of the direct stellar radiation. Detailed radiative transfer calculations based on the simplest model for envelope-embedded disks successfully fit the data from UV to mm wavelengths and show that the disks have central holes. This model also resolves naturally some puzzling results of IR imaging.

9 pages, 2 figures. accepted to ApJL

References in corpus (6)

• Spectral Energy Distributions of T Tauri Stars With Passive Circumstellar Disks
• Self-similarity and scaling behavior of IR emission from radiatively heated dust: I. Theory
• HST/NICMOS Imaging of Disks and Envelopes Around Very Young Stars
• User Manual for DUSTY
• On Protostellar Disks in Herbig Ae/Be Stars
• Dust Emission from IRC+10216

Cited by in corpus (43)

• ISO spectroscopy of circumstellar dust in 14 Herbig Ae/Be systems: towards an understanding of dust processing
• Flaring vs. self-shadowed disks: the SEDs of Herbig Ae/Be stars
• Spectral Energy Distributions of T Tauri and Herbig Ae Disks: Grain Mineralogy, Parameter Dependences, and Comparison with ISO LWS Observations
• The inner regions of protoplanetary disks
• ISO spectroscopy of gas and dust: from molecular clouds to protoplanetary disks
• A high-resolution spectropolarimetric survey of Herbig Ae/Be stars - I. Observations and measurements
• On the Interferometric Sizes of Young Stellar Objects
• Understanding the spectra of isolated Herbig stars in the frame of a passive disk model
• Few Skewed Disks Found in First Closure-Phase Survey of Herbig Ae/Be stars
• A dusty torus around the luminous young star LkHa 101
• HST/NICMOS2 coronagraphic observations of the circumstellar environment of three old PMS stars: HD 100546, SAO 206462 and MWC 480
• Study of the properties and spectral energy distributions of the Herbig AeBe stars HD 34282 and HD 141569
• Near-Infrared Interferometric Measurements of Herbig Ae/Be Stars
• Detection of an inner gaseous component in a Herbig Be star accretion disk: Near- and mid-infrared spectro-interferometry and radiative transfer modeling of MWC 147
• Disk and wind interaction in the young stellar object MWC 297 spatially resolved with VLTI/AMBER
• The 2-D structure of dusty disks around Herbig Ae/Be stars, I. Models with grey opacities
• Millimeter observations and modeling of the AB Aurigae system
• The Thermal Regulation of Gravitational Instabilities in Protoplanetary Disks. IV. Simulations with Envelope Irradiation
• The Remarkable Mid-Infrared Jet of Massive Young Stellar Object G35.20-0.74
• Near infrared and the inner regions of protoplanetary disks
• Properties of the $\delta$ Scorpii Circumstellar Disk from Continuum Modeling
• Imaging the disk around the luminous young star LkHalpha 101 with infrared interferometry
• A Resolved Circumstellar Disk around the Herbig Ae Star HD 100546 in the Thermal Infrared
• Toward Understanding the B[e] Phenomenon. VII. AS 386, a single-lined binary with a candidate black hole component
• Disks and Halos in Pre-Main-Sequence Stars
• Young massive stars in the ISOGAL survey II. The catalogue of bright YSO candidates
• Revealing the sub-AU asymmetries of the inner dust rim in the disk around the Herbig Ae star R CrA
• A catalog of 120 NGC open star clusters
• Observations of Herbig Ae Disks with Nulling Interferometry
• HD 97048's Circumstellar Environment as Revealed by a HST/ACS Coronagraphic Study of Disk Candidate Stars
• A compact dusty disk around the Herbig Ae star HR 5999 resolved with VLTI / MIDI
• Magnetic fields in circumstellar disks: The potential of Zeeman observations
• Shadows, gaps, and ring-like structures in protoplanetary disks
• Periodic Eclipses of the Young Star PDS 110 Discovered with WASP and KELT Photometry
• PAHs in protoplanetary disks: emission and X-ray destruction
• Resolved Mid-Infrared Emission Around AB Aur and V892 Tau with Adaptive Optics Nulling Interferometric Observations
• A very young star forming region detected by the ISOPHOT Serendipity Survey
• The Mid-Infrared Emitting Dust Around AB Aur
• Infrared Classification of Galactic Objects
• Polarimetric variations of binary stars. III Periodic polarimetric variations of the Herbig Ae/Be star MWC 1080
• A new spectroscopic and interferometric study of the young stellar object V645 Cyg
• Speckle interferometry of the HAeBe star V376 Cas
• Star Formation at milli-arcsecond resolution