Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-11-04
Astronomy and Astrophysics
Astrophysics
2 pages, LaTeX with 1 EPS figure embedded, using newpasp.sty (supplied). To appear in the proceedings of the XIXth IAP colloqu
Scientific paper
We searched for spectral signatures from the exosphere of HD209458 in the UV and the near-IR with UVES and ISAAC at the VLT. We looked in particular for the helium absorption feature at 10 830 \AA predicted to be among the strongest ones. The upper limit of the He I line derived is 0.5% at 3 $\sigma$ for a 3 \AA bandwith. Planet-induced chromospheric activity search on HD209458 was also performed.
Coustenis Athena
Iro Nicolas
Lajous N.
Mayor Marcel
Moutou Claire
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