Stellar spectra are polluted with the absorption lines produced by the Earth's atmosphere. Earlier modeling work showed that a perfect telluric correction increases the radial velocity precision compared to masking the regions affected by telluric absorption. But what is the case for real observations? With CARMENES near-infrared spectra, I will show the impact of the telluric correction on...
We performed simulations using the Kurucz solar spectrum and TAPAS generated telluric spectra across a year with varying atmospheric conditions to quantify the effects of telluric contamination in PRVs. We chose the wavelength range from 350nm to 2.5 micron and assumed a spectral resolution of R=120,000 with no photon noise. We assumed perfectly known spectral PSF, wavelength solution, and...
Emission and absorption from the Earth’s atmosphere at infrared and optical wavelengths introduces a significant source of contamination for ground based precision RV spectroscopy. These telluric features not only add statistical noise and remove flux from our spectra, but introduce additional uncertainty because some of the telluric line strengths themselves are highly variable and not known...
