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Transitional Disks Associated With Intermediate-mass Stars: Results of the SEEDS YSO survey
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Author and Affiliation:
Grady, Carol A.(Eureka Scientific, Inc., Laurel, MD, United States);
Fukagawa, M.(Osaka Univ., Japan);
Maruta, Y.(Osaka Univ., Japan);
Ohta, Y.(Osaka Univ., Japan);
Wisniewski, J.(Oklahoma Univ., Norman, OK, United States);
Hashimoto, J.(Oklahoma Univ., Norman, OK, United States);
Okamoto, Y.(Ibaraki Univ., Mito, Japan);
Momose, M.(Ibaraki Univ., Mito, Japan);
Currie, T.(Toronto Univ., Ontario, Canada);
Mcelwain, Michael W.(NASA Goddard Space Flight Center, Greenbelt, MD United States);
Muto, T.(Kogakuin Univ., Tokyo, Japan);
Kotani, T.(National Astronomical Observatory, Gunma, Japan);
Kusakabe, Nb.(National Astronomical Observatory, Gunma, Japan);
Follette, K.(Arizona Univ., Tucson, AZ, United States);
Bonnefoy, M.(Max-Planck-Inst. fuer Astronomie, Heidelberg, Germany);
Feldt, M.(Max-Planck-Inst. fuer Astronomie, Heidelberg, Germany);
Sitko, M.(Cincinnati Univ., OH, United States);
Takami, M.(Academia Sinica, Inst. of Astronomy and Astrophysics, Taipei, Taiwan, Province of China);
Karr, J.(Academia Sinica, Inst. of Astronomy and Astrophysics, Taipei, Taiwan, Province of China);
Tamura, M.(National Astronomical Observatory, Tokyo, Japan)
Abstract: As part of the Strategic Exploration of Exoplanets and Disks with Subaru YSO survey, we have surveyed a number of Herbig B-F stars at H-band using Polarimetric Differential Imaging+Angular differential imaging. Historically, Herbig stars have been sorted based on their IR SEDs into those with SEDS which can be fit by powerlaws over 1-200 ┬Ám (Meeus et al. 2001, group II), and those which can be interpreted as a powerlaw + a blackbody component (Meeus group I) or powerlaw+missing warm thermal emission, which is one of the criteria for identification of gapped or transitional disks. Meeus group II disks, when imaged with HiCIAO show featureless disks with depolarization along the projection of the disk semi-minor axis (Kusakabe et al. 2012). This is what we had expected to see for the Meeus group I disks, except for the addition of wide gaps or central cavities. Instead we find wild diversity, suggesting that transitional disks are highly perturbed compared to Meeus group II disks.
Publication Date: Jan 05, 2014
Document ID:
20140005680
(Acquired May 16, 2014)
Subject Category: ASTROPHYSICS
Report/Patent Number: GSFC-E-DAA-TN12714
Document Type: Oral/Visual Presentation
Meeting Information: American Astronomical Society Meeting; 223rd; 5-9 Jan. 2014; Washington, D.C.; United States
Meeting Sponsor: American Astronomical Society; Washington, DC, United States
Contract/Grant/Task Num: NNG12PP44P; NNG13PB64P; NSF AST 100314; NNX13AK17G; RTOP 12-OSS12-0045
Financial Sponsor: NASA Goddard Space Flight Center; Greenbelt, MD United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD United States
Description: 1p; In English; Original contains color illustrations
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright; Distribution as joint owner in the copyright
NASA Terms: A STARS; B STARS; DEPOLARIZATION; EXTRASOLAR PLANETS; F STARS; IMAGING TECHNIQUES; POLARIMETRY; STELLAR MASS; SURVEYS; THERMAL EMISSION
Other Descriptors: HERBIG B-F STARS; POLARIMETRIC DIFFERENTIAL IMAGING; WARM THERMAL EMISSION
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