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Submillimeter structure of the disk of the Butterfly Star

Wolf, S. and Schegerer, A. and Beuther, H. and Padgett, D. L. and Stapelfeldt, K. R. (2008) Submillimeter structure of the disk of the Butterfly Star. Astrophysical Journal Letters, 674 (2). L101-L104. ISSN 2041-8205.

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We present a spatially resolved 894 mm 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 µm. 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).

Item Type:Article
Related URLs:
URLURL TypeDescription
Padgett, D. L.0000-0001-5334-5107
Stapelfeldt, K. R.0000-0002-2805-7338
Additional Information:© 2008 The American Astronomical Society. Received 2006 December 1; accepted 2008 January 8; published 2008 January 28. S. W. and A. S. are supported by the German Research Foundation (DFG) through the Emmy Noether grant WO 857/ 2. H. B. is supported by the DFG through the Emmy Noether grant BE 2578. We wish to thank the anonymous referee for valuable suggestions concerning the presentation and discussion of our results.
Funding AgencyGrant Number
Deutsche Forschungsgemeinschaft (DFG)WO 857/2
Deutsche Forschungsgemeinschaft (DFG)BE 2578
Subject Keywords:circumstellar matter; planetary systems: formation; planetary systems: protoplanetary disks; radiative transfer; stars: individual (IRAS 04302+2247); submillimeter
Issue or Number:2
Record Number:CaltechAUTHORS:20090713-140954760
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Official Citation:Submillimeter Structure of the Disk of the Butterfly Star S. Wolf, A. Schegerer, H. Beuther, D. L. Padgett, and K. R. Stapelfeldt 2008 ApJ 674 L101-L104 doi: 10.1086/529188.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:14575
Deposited By: Tony Diaz
Deposited On:28 Aug 2009 23:32
Last Modified:01 Nov 2019 04:43

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