Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Reimagining the water snowline   Water is a molecule that is tightly related to many facets of star and planet
formation. Water's abundance and distribution, especially the location of it's
snowline has thus been the subject of much study. While water is seen to be
abundant in the inner region of proto-planetary disks in infrared spectroscopy,
detections of water in the disk in the sub-millimeter are rare, with only one
detection towards AS 205. Here we put the multitude of non-detections and the
single detection into context of recent physico-chemical models. We find that
the 321.2257 GHz (10(2,9) - 9(3,6)) line detection towards AS 205 is
inconsistent with a normal inner disk temperature structure and that the
observed line must be masing. Furthermore, the emitting area derived from the
line width, together with published analyses on water in disks around T-Tauri
stars implies that the water snowline in the disk surface is at the same
location as the snowline in the mid-plane. We propose that this is caused by
vertical mixing continuously sequestering water from the warm surface layers
into the cold disk midplane.

29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
4
The categories of this paper are: cond-mat
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg