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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 421409.0, MPI für Astronomie / Publikationen_mpia
Submillimeter structure of the disk of the Butterfly Star
Authors:Wolf, S.; Schegerer, A.; Beuther, H.; Padgett, D. L.; Stapelfeldt, K. R.
Date of Publication (YYYY-MM-DD):2008
Title of Journal:The Astrophysical Journal
Journal Abbrev.:ApJ
Start Page:L101
End Page:L104
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:We present a spatially resolved 894 mum map of the circumstellar disk of the Butterfly Star in Taurus (IRAS 04302+2247), obtained with the Submillimeter Array (SMA). The predicted and observed radial brightness profiles agree well in the outer disk region but differ in the inner region with an outer radius of ~80-120 AU. In particular, we find a local minimum of the radial brightness distribution at the center, which can be explained by an increasing density/optical depth combined with the decreasing vertical extent of the disk toward the center. Our finding indicates that young circumstellar disks can be optically thick at wavelengths as long as 894 mum. While earlier modeling lead to general conclusions about the global disk structure and, most importantly, evidence for grain growth in the disk (Wolf, Padgett, & Stapelfeldt), the presented SMA observations provide more detailed constraints for the disk structure and dust grain properties in the inner, potentially planet-forming region (<~80-120 AU) versus the outer disk region (~120-300 AU).
Free Keywords:Stars: Circumstellar Matter; Stars: Planetary Systems: Formation; Stars: Planetary Systems: Protoplanetary Disks; Radiative Transfer; Stars: Individual: Alphanumeric: IRAS 04302+2247; Submillimeter
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL: [ID No:1]
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