Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Is PSR B0943+10 a low-mass quark star?   A recent X-ray observation has shown that the radio pulsar PSR B0943+10, with
clear drifting subpulses, has a much smaller polar cap area than that of
conventional pulsars with mass of $\sim\msun$ and radius of $\sim10$ km. Zhang
et al. (2005) addressed then that this new result conflicts with the standard
vacuum gap model. Nonetheless, the discrepancy could be explained if PSR
B0943+10 is actually a low-mass quark star. It is found that the potential drop
in the open-field-line region of oblique pulsars (i.e., inclination angle
$\alpha\neq 0$) might be $\sim 10^2$ times that of aligned pulsars, and that
PSR B0943+10 with $\alpha = 12.4^{\rm o}$ could be well above the deathline. We
thus conclude that the Ruderman-Sutherland-type vacuum gap model still works
well for this pulsar if it is a bare quark star with a mass of $\sim
0.02M_\odot$ and a radius of $\sim 2.6$ km.

36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
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The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs