Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Simulations of the tidal interaction and mass transfer of a star in an
  eccentric orbit around an intermediate-mass black hole: the case of HLX-1   The X-ray source HLX-1 near the spiral galaxy ESO 243-49 is currently the
best intermediate-mass black hole candidate. It has a peak bolometric
luminosity of $10^{42}$ erg s$^{-1}$, which implies a mass inflow rate of
$\sim10^{-4}$ MSun yr$^{-1}$, but the origin of this mass is unknown. It has
been proposed that there is a star on an eccentric orbit around the black hole
which transfers mass at pericentre. To investigate the orbital evolution of
this system, we perform stellar evolution simulations using mesa and SPH
simulations of a stellar orbit around an intermediate-mass black hole using fi.
We run and couple these simulations using the amuse framework. We find that
mass is lost through both the first and second Lagrange points and that there
is a delay of up to 10 days between the pericentre passage and the peak mass
loss event. The orbital evolution timescales we find in our simulations are
larger than what is predicted by analytical models, but these models fall
within the errors of our results. Despite the fast orbital evolution, we are
unable to reproduce the observed change in outburst period. We conclude that
the change in the stellar orbit with the system parameters investigated here is
unable to account for all observed features of HLX-1.

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The categories of this paper are: supr-con
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The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
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The categories of this paper are: eess
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The categories of this paper are: atom-ph
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The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
4
The categories of this paper are: cond-mat
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The categories of this paper are: q-bio
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The categories of this paper are: hep-lat
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The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
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The categories of this paper are: funct-an
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The categories of this paper are: acc-phys
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The categories of this paper are: q-alg