The 1.2 Millimeter Image of the beta Pictoris Disk

Abstract

We present millimeter imaging observations in the 1200 micron continuum of the disk around beta Pictoris. With the 25 arcsec beam, the beta Pic disk is unresolved perpendicularly to the disk plane (< 10 arcsec), but slightly resolved in the northeast-southwest direction (26 arcsec). Peak emission is observed at the stellar position. A secondary maximum is found 1000 AU along the disk plane in the southwest, which does not positionally coincide with a similar feature reported earlier at 850 micron. Arguments are presented which could be seen in support of the reality of these features. The observed submm/mm emission is consistent with thermal emission from dust grains, which are significantly larger than those generally found in the interstellar medium, including mm-size particles, and thus more reminiscent of the dust observed in protostellar disks. Modelling the observed scattered light in the visible and the emission in the submm/mm provides evidence for the particles dominating the scattering in the visible/NIR and those primarily responsible for the thermal emission at longer wavelengths belonging to different populations.

6 pages, 3 postscript figures, accepted for publication in Astronomy and Astrophysics

References in corpus (2)

• Dust Migration and Morphology in Optically Thin Circumstellar Gas Disks
• Widespread atomic gas emission reveals the rotation of the beta Pictoris disk

Cited by in corpus (15)

• Do Two Temperature Debris Disks Have Multiple Belts?
• Modeling Collisional Cascades In Debris Disks: Steep Dust-Size Distributions
• The Spatial Structure of the beta Pictoris Gas Disk
• Kuiper Belts Around Nearby Stars
• The Dust and Gas Around beta Pictoris
• Millimeter Imaging of the beta Pictoris Debris Disk: Evidence for a Planetesimal Belt
• Ro-vibrational CO Detected in the $\beta$~Pictoris Circumstellar Disk
• The β Pictoris disk imaged by Herschel PACS and SPIRE
• A Submillimetre Search for Cold Extended Debris Disks in the Beta Pictoris Moving Group
• A Comprehensive Dust Model Applied to the Resolved Beta Pictoris Debris Disk from Optical to Radio Wavelengths
• VLT imaging of the β Pictoris gas disk
• O18O and C18O observations of rho Oph A
• The far reaches of the beta Pictoris debris disk
• Polarization from Aligned Dust Grains in the $\beta$ Pic Debris Disk
• A background galaxy in the field of the beta Pic debris disk