Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Evolution of long-lived globular cluster stars. II. Sodium abundance
  variations on the asymptotic giant branch as a function of globular cluster
  age and metallicity   Long-lived stars in GCs exhibit chemical peculiarities with respect to their
halo counterparts. In particular, Na-enriched stars are identified as belonging
to a 2d stellar population born from cluster material contaminated by the
H-burning ashes of a 1st stellar population. Their presence and numbers in
different locations of the CMDs provide important constraints on the
self-enrichment scenarios. In particular, the ratio of Na-poor to Na-rich stars
on the AGB has recently been found to vary strongly from cluster to cluster,
while it is relatively constant on the RGB. We investigate the impact of both
age and metallicity on the theoretical Na spread along the AGB within the
framework of the fast rotating massive stars scenario for GC self-enrichment.
(tb continued)

28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th
18
The categories of this paper are: econ