Bibcode
Socas-Navarro, H.
Referencia bibliográfica
The Astrophysical Journal, Volume 855, Issue 2, article id. 110, 7 pp. (2018).
Fecha de publicación:
3
2018
Revista
Número de citas
16
Número de citas referidas
14
Descripción
This paper puts forward a possible new indicator of the presence of
moderately advanced civilizations on transiting exoplanets. The idea is
to examine the region of space around a planet where potential
geostationary or geosynchronous satellites would orbit (hereafter, the
Clarke exobelt). Civilizations with a high density of devices and/or
space junk in that region, but otherwise similar to ours in terms of
space technology (our working definition of “moderately
advanced”), may leave a noticeable imprint on the light curve of
the parent star. The main contribution to such a signature comes from
the exobelt edge, where its opacity is maximum due to geometrical
projection. Numerical simulations have been conducted for a variety of
possible scenarios. In some cases, a Clarke exobelt with a fractional
face-on opacity of ∼10‑4 would be easily observable
with existing instrumentation. Simulations of Clarke exobelts and
natural rings are used to quantify how they can be distinguished by
their light curves.
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