Bibcode
Yan, F.; Fosbury, R.; Petr-Gotzens, M.; Pallé, E.; Zhao, G.
Referencia bibliográfica
The Messenger, vol. 161, p. 17-19
Advertised on:
9
2015
Número de citas
0
Número de citas referidas
0
Descripción
Exoplanetary transits offer the opportunity to measure the transmission
of long, tangential pathlengths through their atmospheres. Since the
fraction of the observed stellar light taking these paths is very small,
transit photometric and spectrophotometric measurements of light curves
require very high levels of measurement stability, favouring the use of
intrinsically stable space telescopes. By studying the
Rossiter–McLaughlin effect on the radial velocity of the transited
star, pure, high-precision radial velocity measurements can be used to
estimate the changes in planetary atmospheric transmission with
wavelength: a promising method for future studies of small planets with
very large ground-based telescopes since it removes the requirement for
extreme photometric stability. This article describes a successful
feasibility experiment using the HARPS instrument to measure reflected
moonlight during the penumbral phases of a Lunar eclipse, effectively
providing an observation of an Earth transit.