Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Initial Conditions of Clustered Star Formation I: NH3 Observations
  of Dense Cores in Ophiuchus   We present combined interferometer and single dish telescope data of NH3
(J,K) = (1,1) and (2,2) emission towards the clustered star forming Ophiuchus
B, C and F Cores at high spatial resolution (~1200 AU) using the Australia
Telescope Compact Array, the Very Large Array, and the Green Bank Telescope.
While the large scale features of the NH3 (1,1) integrated intensity appear
similar to 850 micron continuum emission maps of the Cores, on 15" (1800 AU)
scales we find significant discrepancies between the dense gas tracers in Oph
B, but good correspondence in Oph C and F. Using the Clumpfind structure
identifying algorithm, we identify 15 NH3 clumps in Oph B, and 3 each in Oph C
and F. Only five of the Oph B NH3 clumps are coincident within 30" (3600 AU) of
a submillimeter clump. We find v_LSR varies little across any of the Cores, and
additionally varies by only ~1.5 km/s between them. The observed NH3 line
widths within the Oph B and F Cores are generally large and often mildly
supersonic, while Oph C is characterized by narrow line widths which decrease
to nearly thermal values. We find several regions of localized narrow line
emission (\Delta v < 0.4 km/s), some of which are associated with NH3 clumps.
We derive the kinetic temperatures of the gas, and find they are remarkably
constant across Oph B and F, with a warmer mean value (T_K = 15 K) than
typically found in isolated regions and consistent with previous results in
clustered regions. Oph C, however, has a mean T_K = 12 K, decreasing to a
minimum T_K = 9.4 K towards the submillimeter continuum peak, similar to
previous studies of isolated starless cores. There is no significant difference
in temperature towards protostars embedded in the Cores. [Abridged]

1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
3
The categories of this paper are: physics
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys