Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gas and Dust Toward DG Tau B and VV CrA   We present findings for DG Tau B and VV CrA, two of the objects observed in
our Spitzer IRS project to search for molecular absorption in edge-on disks,
along with near-IR spectroscopy of the CO fundamental transitions and mid-IR
imaging. While the only gas absorption seen in the Spitzer IRS spectrum toward
DG Tau B is CO$_{2}$, we use gas abundances and gas/ice ratios to argue that we
are probing regions of the disk that have low organic molecule abundances. This
implies the rarity of detecting molecular absorption toward even edge-on disks
with Spitzer IRS is a result of high dependence on the line of sight. We also
argue the disk around DG Tau B shows high amounts of grain growth and settling.
For VV CrA, we use the silicate absorption feature to estimate a dust
extinction, and model the disk with a spectral energy distribution fitting tool
to give evidence in support of the disk geometry presented by Smith et al.
(2009) where the Primary disk is the main source of extinction toward the
infrared companion.

1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex