Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The high-energy environment in the super-earth system CoRoT-7   High-energy irradiation of exoplanets has been identified to be a key
influence on the stability of these planets' atmospheres. So far,
irradiation-driven mass-loss has been observed only in two Hot Jupiters, and
the observational data remain even more sparse in the super-earth regime. We
present an investigation of the high-energy emission in the CoRoT-7 system,
which hosts the first known transiting super-earth. To characterize the
high-energy XUV radiation field into which the rocky planets CoRoT-7b and
CoRoT-7c are immersed, we analyzed a 25 ks XMM-Newton observation of the host
star. Our analysis yields the first clear (3.5 sigma) X-ray detection of
CoRoT-7. We determine a coronal temperature of ca. 3 MK and an X-ray luminosity
of 3*10^28 erg/s. The level of XUV irradiation on CoRoT-7b amounts to ca. 37000
erg/cm^2/s. Current theories for planetary evaporation can only provide an
order-of-magnitude estimate for the planetary mass loss; assuming that CoRoT-7b
has formed as a rocky planet, we estimate that CoRoT-7b evaporates at a rate of
about 1.3*10^11 g/s and has lost ca. 4-10 earth masses in total.

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The categories of this paper are: hep-th
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The categories of this paper are: econ
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The categories of this paper are: math
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The categories of this paper are: acc-phys
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-ex
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The categories of this paper are: nlin
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The categories of this paper are: adap-org
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The categories of this paper are: ao-sci
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The categories of this paper are: q-alg
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The categories of this paper are: solv-int
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The categories of this paper are: cond-mat
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The categories of this paper are: funct-an
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The categories of this paper are: cs
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The categories of this paper are: physics
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The categories of this paper are: chao-dyn