The Mid-Infrared Emitting Dust Around AB Aur

Abstract

Using the Keck I telescope, we have obtained 11.7 micron and 18.7 micron images of the circumstellar dust emission from AB Aur, a Herbig Ae star. We find that AB Aur is probably resolved at 18.7 micron with an angular diameter of 1.2" at a surface brightness of 3.5 Jy/arcsec^2. Most of the dust mass detected at millimeter wavelengths does not contribute to the 18.7 micron emission, which is plausibly explained if the system possesses a relatively cold, massive disk. We find that models with an optically thick, geometrically thin disk, surrounded by an optically thin spherical envelope fit the data somewhat better than flared disk models.

ApJ in press, 4 color figures

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Cited by in corpus (12)

• The Mass Dependence Between Protoplanetary Disks and their Stellar Hosts
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• Relation between the luminosity of young stellar objects and their circumstellar environment
• The TEXES Survey For H2 Emission From Protoplanetary Disks
• TEXES Observations of Pure Rotational H2 Emission From AB Aurigae
• Observations of Herbig Ae Disks with Nulling Interferometry
• Resolved Mid-Infrared Emission Around AB Aur and V892 Tau with Adaptive Optics Nulling Interferometric Observations
• An emission ring at 20 microns around the HAEBE star AB Aurigae: unveiling the disc structure
• Mid-Infrared Imaging of the Herbig Ae Star AB Aurigae: Extended Emission on Several Scales
• Pre-transitional disk nature of the AB Aur disk
• Mid-infrared observations of the transitional disks around DH Tau, DM Tau, and GM Aur
• Disentangling Planets from Photoelectric Instability in Gas-Rich Optically Thin Dusty Disks