zur Info:
Hello,
please note that our colleagues from Gothard Astrophysical Observatory of Lorand Eotvos University (Hungary) recently published an article on medium-resolution echelle spectroscopy of pulsating and exoplanet host stars with sub-meter telescopes and eShel spectrograph.
/*Abstract:*/
Doppler observations of exoplanet systems have been a very expensive technique, mainly due to the high costs of high-resolution stable spectrographs. Recent advances in instrumentation enable affordable Doppler planet detections with surprisingly small optical telescopes.
We investigate the possibility of measuring Doppler reflex motion of planet hosting stars with small-aperture telescopes that have traditionally been neglected for this kind of studies. After thoroughly testing the recently developed and commercially available Shelyak eShel echelle spectrograph, we demonstrated that it is routinely possible to achieve velocity precision at the 100ms-1 level, reaching down to ±50 ms-1 for the best cases. We describe our off-the-shelf instrumentation, including a new 0.5m RC telescope at the Gothard Astrophysical Observatory of Lor\'and E\"otv\"os University equipped with an intermediate resolution fiber-fed echelle spectrograph.
We present some follow-up radial velocity measurements of planet hosting stars and point out that updating the orbital solution of Doppler-planets is a very important task that can be fulfilled with sub-meter sized optical telescopes without requesting very expensive telescope times on 2--4~m (or larger) class telescopes.
/*URL to the article:*/
http://arxiv.org/abs/1401.3532
/*A PDF of the associated poster is also available here:*/
https://www.astro.sk/APST2013/posters/BP16.pdf
Cordialement,
--
Olivier Thizy
Shelyak Instruments
_________________
Herzliche Grüße / best regards
Lothar
https://lotharschanne.wordpress.com/
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