Exoplanetary System HD 189733 - Chromosphere, Transit, Activity
Abstract
We present a study of the temporal evolution of the chromospherically sensitive lines in the transiting exoplanetary system HD 189733 using high-resolution UVES spectra. With its fast temporal cadence of only 45 s and its wide spectral coverage, our time series is ideal to study the influence of the transiting planetary disk on chromospheric lines . We measured the equivalent width and central line depression of the Ca II H and K lines, Hα, and the Ca II infrared triplet. While all these lines show temporal evolution on a scale potentially induced by the occulting planetary disk, strong intrinsic stellar variability prevents us from uniquely ascribing the observed variation to the planetary transit.
- Publication:
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18th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun
- Pub Date:
- January 2015
- Bibcode:
- 2015csss...18..779K