Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Stability boundaries for massive stars in the sHR diagram   Stability boundaries of radial pulsations in massive stars are compared with
positions of variable and non-variable blue-supergiants in the spectroscopic HR
(sHR) diagram (Langer & Kudritzki 2014), whose vertical axis is $4\log T_{\rm
eff}-\log g \,(= \log L/M)$. Observational data indicate that variables tend to
have higher $L/M$ than non-variables in agreement with the theoretical
prediction. However, many variable blue-supergiants are found to have values of
$L/M$ below the theoretical stability boundary; i.e., surface gravities seem to
be too high by around 0.2-0.3 dex.

27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
4
The categories of this paper are: cond-mat
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin