Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Periastron Precession Measurements in Transiting Extrasolar Planetary
  Systems at the Level of General Relativity   Transiting exoplanetary systems are surpassingly important among the
planetary systems since they provide the widest spectrum of information for
both the planet and the host star. If a transiting planet is on an eccentric
orbit, the duration of transits T_D is sensitive to the orientation of the
orbital ellipse relative to the line of sight. The precession of the orbit
results in a systematic variation in both the duration of individual transit
events and the observed period between successive transits, P_obs. The
periastron of the ellipse slowly precesses due to general relativity and
possibly the presence of other planets in the system. This secular precession
can be detected through the long-term change in P_obs (transit timing
variations, TTV) or in T_D (transit duration variations, TDV). We estimate the
corresponding precession measurement precision for repeated future observations
of the known eccentric transiting exoplanetary systems (XO-3b, HD 147506b, GJ
436b and HD 17156b) using existing or planned space-borne instruments. The TDV
measurement improves the precession detection sensitivity by orders of
magnitude over the TTV measurement. We find that TDV measurements over a ~4
year period can typically detect the precession rate to a precision well
exceeding the level predicted by general relativity.

9
The categories of this paper are: nlin
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
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The categories of this paper are: cs
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The categories of this paper are: hep-ex
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The categories of this paper are: patt-sol
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The categories of this paper are: stat
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The categories of this paper are: quant-ph
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The categories of this paper are: econ