Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: X-ray reprocessing in accreting pulsar GX 301-2 observed with
  Insight-HXMT   We investigate the absorption and emission features in observations of GX
301-2 detected with Insight-HXMT/LE in 2017-2019. At different orbital phases,
we found prominent Fe Kalpha, Kbeta and Ni Kalpha lines, as well as Compton
shoulders and Fe K-shell absorption edges. These features are due to the X-ray
reprocessing caused by the interaction between the radiation from the source
and surrounding accretion material. According to the ratio of iron lines Kalpha
and Kbeta, we infer the accretion material is in a low ionisation state. We
find an orbital-dependent local absorption column density, which has a large
value and strong variability around the periastron. We explain its variability
as a result of inhomogeneities of the accretion environment and/or
instabilities of accretion processes. In addition, the variable local column
density is correlated with the equivalent width of the iron Kalpha lines
throughout the orbit, which suggests that the accretion material near the
neutron star is spherically distributed.

36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics