Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Evolution of Dusty Disks in Nearby Young Stellar Groups   Given their proximity and age differences, nearby groups of young stars are
valuable laboratories for investigations of disk evolution and diversity. The
estimated 10-Myr age of groups like the TW Hydrae Association provides a strong
constraint on disk evolution timescales and fills a significant gap in the age
sequence between 1-Myr-old T Tauri stars in molecular clouds and 50-Myr-old
nearby open clusters. I review the results of recent and on-going studies of
dusty disks in three nearby groups --TW Hya, $\eta$ Cha and MBM 12-- that
suggest rapid evolution of inner disks. However, it is unlikely that there is a
universal evolutionary timescale for protoplanetary disks, especially when the
influence of companion stars is taken into account.

22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom