Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: X-ray emission from candidate stellar merger remnant TYC 2597-735-1 and
  its Blue Ring Nebula   Tight binary or multiple star systems can interact through mass transfer and
follow vastly different evolutionary pathways than single stars. The star TYC
2597-735-1 is a candidate for a recent stellar merger remnant resulting from a
coalescence of a low-mass companion with a primary star a few thousand years
ago. This violent event is evident in a conical outflow ("Blue Ring Nebula")
emitting in UV light and surrounded by leading shock filaments observed in
H$\alpha$ and UV emission. From Chandra data, we report the detection of X-ray
emission from the location of TYC 2597-735-1 with a luminosity
$\log(L_\mathrm{X}/L_\mathrm{bol})=-5.5$. Together with a previously reported
period around 14~days, this indicates ongoing stellar activity and the presence
of strong magnetic fields on TYC 2597-735-1. Supported by stellar evolution
models of merger remnants, we interpret the inferred stellar magnetic field as
dynamo action associated with a newly formed convection zone in the atmosphere
of TYC 2597-735-1, though internal shocks at the base of an accretion-powered
jet cannot be ruled out. We speculate that this object will evolve into an FK
Com type source, i.e. a class of rapidly spinning magnetically active stars for
which a merger origin has been proposed but for which no relic accretion or
large-scale nebula remains visible. We also detect likely X-ray emission from
two small regions close to the outer shock fronts in the Blue Ring Nebula,
which may arise from either inhomogenities in the circumstellar medium or in
the mass and velocity distribution in the merger-driven outflow.

5
The categories of this paper are: gr-qc
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ