CARMENES - RV search for terrestrial planets around M dwarfs

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CARMENES - RV search for terrestrial planets around M dwarfs

Post by Lazarus on 22nd October 2012, 1:20 pm

CARMENES. I. A radial-velocity survey for terrestrial planets in the habitable zones of M dwarfs. A historical overview
http://arxiv.org/abs/1210.5465

Uses two spectrographs in the wavelength range 550 1700 nm, expected to start mid 2014.
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Re: CARMENES - RV search for terrestrial planets around M dwarfs

Post by Galzi on 24th October 2012, 2:52 pm

Interesting the two spectrographs-approach - observing in different wavelengths could allow to filter jitter and stellar activity noise in RV measurements

http://carmenes.caha.es/ext/publications/CARMENES_Quirrenbachetal2010_SanDiego.pdf

The concept of a dual-channel spectrograph will permit the determination of radial velocity variations at different wavelengths simultaneously. Activity-induced velocity variations are expected to be wavelength dependent, which is strictly not the case for orbital variations. Thus, it will be possible to differentiate an orbital period from activity, and the wavelength dependence will provide valuable information on the spot temperature and distribution.

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Re: CARMENES - RV search for terrestrial planets around M dwarfs

Post by Lazarus on 24th October 2012, 5:55 pm

That's useful, I recall a couple of planets have been retracted for this reason. TW Hydrae springs to mind...
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Re: CARMENES - RV search for terrestrial planets around M dwarfs

Post by Lazarus on 5th September 2017, 4:56 pm

The abstract for the upcoming presentation by Trifon Trifonov at the AG meeting 2017 Exoplanets splinter group may be of interest. A couple of new planets, plus a non-detection of a previously-reported one.
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Re: CARMENES - RV search for terrestrial planets around M dwarfs

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