Exoplanets around nearby M dwarfs with NIR RVs

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Exoplanets around nearby M dwarfs with NIR RVs

Post by Sirius_Alpha on 21st March 2016, 8:37 pm

Precise Near-Infrared Radial Velocities
http://arxiv.org/abs/1603.05999

We present the results of two 2.3 micron near-infrared radial velocity surveys to detect exoplanets around 36 nearby and young M dwarfs. We use the CSHELL spectrograph (R ~46,000) at the NASA InfraRed Telescope Facility, combined with an isotopic methane absorption gas cell for common optical path relative wavelength calibration. We have developed a sophisticated RV forward modeling code that accounts for fringing and other instrumental artifacts present in the spectra. With a spectral grasp of only 5 nm, we are able to reach long-term radial velocity dispersions of ~20-30 m/s on our survey targets.

They assert that they're still working on publishing the results. Doesn't look like any of the star names are in the paper.

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Re: Exoplanets around nearby M dwarfs with NIR RVs

Post by Lazarus on 22nd March 2016, 5:49 pm

Already some initial observations for GJ 15 A, SV Peg and GJ 876

Gao et al. (2016) "Retrieval of Precise Radial Velocities from Near-Infrared High Resolution Spectra of Low Mass Stars"
http://arxiv.org/abs/1603.05997

Also some results for over 30 stars

Gagné et al. (2016) "A High-Precision NIR Survey for RV Variable Low-Mass Stars"
http://arxiv.org/abs/1603.05998

Apparently this is the first multi-wavelength confirmation of GJ 876 b and c.
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Re: Exoplanets around nearby M dwarfs with NIR RVs

Post by Stalker on 23rd March 2016, 6:55 am

No new discoveries?

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Re: Exoplanets around nearby M dwarfs with NIR RVs

Post by Sirius_Alpha on 23rd March 2016, 10:08 pm

They assert that they're still working on publishing the results. Doesn't look like any of the star names are in the paper.

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Re: Exoplanets around nearby M dwarfs with NIR RVs

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