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NEAR-IR POLARIZED SCATTERED LIGHT IMAGERY OF THE DoAr 28 TRANSITIONAL DISK
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Number of Authors: 55
2015 (English)In: Astronomical Journal, ISSN 0004-6256, E-ISSN 1538-3881, Vol. 150, no 3, 86Article in journal (Refereed) Published
Abstract [en]

We present the first spatially resolved polarized scattered light H-band detection of the DoAr 28 transitional disk. Our two epochs of imagery detect the scattered light disk from our effective inner working angle of 0.10 (13 AU) out to 0.50 (65 AU). This inner working angle is interior to the location of the system's gap inferred by previous studies using spectral energy distribution modeling (15 AU). We detected a candidate point source companion 1.08 northwest of the system; however, our second epoch of imagery strongly suggests that this object is a background star. We constructed a grid of Monte Carlo Radiative Transfer models of the system, and our best fit models utilize a modestly inclined (50 degrees), 0.01 M-circle dot disk that has a partially depleted inner gap from the dust sublimation radius out to similar to 8 AU. Subtracting this best fit, axi-symmetric model from our polarized intensity data reveals evidence for two small asymmetries in the disk, which could be attributable to a variety of mechanisms.

Place, publisher, year, edition, pages
2015. Vol. 150, no 3, 86
Keyword [en]
protoplanetary disks, stars: variables: T Tauri, Herbig Ae/Be
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:su:diva-123861DOI: 10.1088/0004-6256/150/3/86ISI: 000364008100023OAI: oai:DiVA.org:su-123861DiVA: diva2:878357
Available from: 2015-12-08 Created: 2015-12-08 Last updated: 2015-12-08Bibliographically approved

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Janson, Markus
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Department of Astronomy
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