Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Continued cooling of the accretion-heated neutron star crust in the
  X-ray transient IGR J17480-2446 located in the globular cluster Terzan 5   We present a new Chandra observation (performed in July 2016) of the neutron
star X-ray transient IGR J17480-2446, located in the globular cluster Terzan 5.
We study the continued cooling of the neutron star crust in this system that
was heated during the 2010 outburst of the source. This new observation was
performed two years after the last observation of IGR J17480-2446, hence,
significantly extending the cooling baseline. We reanalysed all available
Chandra observations of the source (but excluding observations during which one
of the known transients in Terzan 5 was in outburst) and fitted the obtained
cooling curve with our cooling code NSCool, which allows for much improved
modelling than what was previously performed for the source. The data and our
fit models indicate that the crust was still cooling ~5.5 years after the
outburst ended. The neutron star crust has likely not reached crust-core
thermal equilibrium yet, and further cooling is predicted (which can be
confirmed with additional Chandra observations in >5 years). Intriguingly, we
find indications that the thermal conductivity might be relatively low in part
of the crust compared to what has been inferred for other crust-cooling sources
and tentatively suggest that this layer might be located around the neutron
drip. The reason for this difference is unclear, but might be related to the
fact that IGR J17480-2446 harbours a relatively slowly rotating neutron star
(with a spin of 11 Hz) that has a relatively strong inferred surface magnetic
field ($10^{9-10}$ Gauss) compared to what is known or typically assumed for
other cooling sources.

8
The categories of this paper are: hep-ex
4
The categories of this paper are: cond-mat
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph