Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Dynamics of Stellar Coronae Harboring Hot-jupiters I. A
  Time-dependent MHD Simulation of the Interplanetary Environment in the HD
  189733 Planetary System   We carry out the first time-dependent numerical MagnetoHydroDynamic modeling
of an extrasolar planetary system to study the interaction of the stellar
magnetic field and wind with the planetary magnetosphere and outflow. We base
our model on the parameters of the HD 189733 system, which harbors a close-in
giant planet. Our simulation reveals a highly structured stellar corona
characterized by sectors with different plasma properties. The star-planet
interaction varies in magnitude and complexity, depending on the planetary
phase, planetary magnetic field strength, and the relative orientation of the
stellar and planetary fields. It also reveals a long, comet-like tail which is
a result of the wrapping of the planetary magnetospheric tail by its fast
orbital motion. A reconnection event occurs at a specific orbital phase,
causing mass loss from the planetary magnetosphere that can generate a hot spot
on the stellar surface. The simulation also shows that the system has
sufficient energy to produce hot-spots observed in Ca II lines in giant planet
hosting stars. However, the short duration of the reconnection event suggests
that such SPI cannot be observed persistently.

16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga