Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Census of Stars and Disks in Corona Australis   We have performed a census of the young stellar populations near the Corona
Australis molecular cloud using photometric and kinematic data from several
sources, particularly Gaia EDR3, and spectroscopy of hundreds of candidate
members. We have compiled a catalog of 393 members of Corona Australis, (39 at
>M6), 293 (36) of which are spectroscopically classified for the first time in
this work. We find that Corona Australis can be described in terms of two
stellar populations, a younger one (few Myr) that is partially embedded in the
cloud (the Coronet Cluster) and an older one (~15 Myr) that surrounds and
extends beyond the cloud (Upper Corona Australis). These populations exhibit
similar space velocities, and we find no evidence for distinct kinematic
populations in Corona Australis, in contrast to a recent study based on Gaia
DR2. The distribution of spectral types in Corona Australis reaches a maximum
at M5 (~0.15 M_sol), indicating that the IMF has a similar characteristic mass
as other nearby star-forming regions. Finally, we have compiled mid-infrared
photometry from the Wide-field Infrared Survey Explorer and the Spitzer Space
Telescope for the members of Corona Australis and we have used those data to
identify and classify their circumstellar disks. Excesses are detected for 122
stars, a third of which are reported for the first time in this work.

12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics
13
The categories of this paper are: quant-ph