Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spatially Resolved Circumstellar Structure of Herbig Ae/Be Stars in the
  Near-Infrared   We have conducted the first systematic study of Herbig Ae/Be stars using the
technique of long baseline stellar interferometry in the near-infrared. The
principal result of this paper is that the IOTA interferometer resolves the
source of infrared excess in 11 of the 15 systems surveyed.
  The visibility data for all the sources has been interpreted within the
context of four simple models which represent a range of plausible
representations for the brightness distribution of the source of excess
emission: a Gaussian, a narrow uniform ring, a flat blackbody disk with a
single temperature power law, and an infrared companion. We find that the
characteristic sizes of the near-infrared emitting regions are larger than
previously thought (0.5-5.9 AU, as given by the FWHM of the Gaussian
intensity). A further major result of this paper is that the sizes measured,
when combined with the observed spectral energy distributions, essentially rule
out accretion disk models represented by blackbody disks with the canonical
radial temperature law with exponent -3/4. We also find that, within the range
observed in this study, none of the sources (except the new binary) shows
varying visibilities as the orientation of the interferometer baseline changes.
  Taken as an ensemble, with no clear evidence in favor of axi-symmetric
structure, the observations favor the interpretation that the circumstellar
dust is distributed in spherical envelopes (the Gaussian model) or thin shells
(the ring model).

12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
3
The categories of this paper are: physics
19
The categories of this paper are: eess
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol