Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The inner radius of T Tauri disks estimated from near-infrared
  interferometry: the importance of scattered light   For young Herbig Ae/Be stars, near-infrared interferometric measurements have
revealed a correlation between the luminosity of the central object and the
position of the disk inner rim. This correlation breaks down for the cooler T
Tauri stars, a fact often interpreted in terms of disks with larger inner
radii. In most cases, the conversion between the observed interferometric
visibility and the calculated disk inner radius was done with a crude disk
emission model. Here, we examine how the use of models that neglect scattered
light can lead to an overestimation of the disk sizes. To do so, synthetic disk
images (and visibilities) are calculated with a full treatment of the radiative
transfer. The relative contributions of thermal emission and scattered light
are compared. We find that the latter can not be neglected for cool stars. For
further comparison, the model visibilities are also converted into inner disk
radii using the same simple disk models as found in the literature. We find
that reliable inner radii can only be estimated for Herbig Ae/Be stars with
these models. However, they lead to a systematic overestimation of the disk
size, by a factor of 2 to 3, for T Tauri stars. We suggest that including
scattered light in the models is a simple (and sufficient) explanation of the
current interferometric measurements of T Tauri stars.

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The categories of this paper are: eess
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The categories of this paper are: math-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: q-fin
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The categories of this paper are: cmp-lg
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The categories of this paper are: econ
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-th
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The categories of this paper are: physics
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The categories of this paper are: solv-int
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The categories of this paper are: hep-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: nucl-ex
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The categories of this paper are: math
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The categories of this paper are: cs
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The categories of this paper are: chao-dyn