Plavchan conducting modeling of telluric absorption features


Peter Plavchan, Assistant Professor, Physics and Astronomy, and his collaborators received $11,250 from NASA for the project: “Precision modeling of telluric absorption features through the retrieval of atmospheric trace gases and spectroscopy update toward Extreme Precision Radial Velocity (EPRV) measurements.”

For this project, the researchers will provide a set of iSHELL stellar spectra, without a gas cell and a corresponding set of line-spread functions (ILS) from iSHELL. For these items, the researchers will provide the information in units of wavenumber.

They will also visit NASA’s Jet Propulsion Laboratory (JPL) to work on the associated analysis.

Observations of a gas cell at Mauna Kea combined with the JPL Bruker FT-IR gas cell spectrum enable the researchers to derive the iSHELL line spread function (LSF). The iSHELL LSF is variable, but for Palomar Habitable Zone Planet Finder (PARVI) and NN-EXPLORE Exoplanet
Investigations with Doppler spectroscopy (NEID), it will be much more stable.

Funding for this project began in December 2020 and will end in late September 2021.


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