2 papers
astro-ph.EP2025
No Planet around the K Giant Star 42 Draconis
Artie P. Hatzes, Volker Perdelwitz, Marie Karjalainen +2
Published radial velocity (RV) measurements of the K giant star 42 Dra reveal variations consistent with a 3.9 M_Jup mass companion in a 479-d orbit. This exoplanet can be confirme…
astro-ph.EP2025
The Influence of Stellar Chromospheres and Coronae on Exoplanet Transmission Spectroscopy
Volker Perdelwitz, Adam Chaikin-Lifshitz, Aviv Ofir +1
A main source of bias in transmission spectroscopy of exoplanet atmospheres is magnetic activity of the host star in the form of stellar spots, faculae or flares. However, the fact…