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Month: April 2022

ELT instrumentation: the ANDES-UBV spectrograph a AIP ?>

ELT instrumentation: the ANDES-UBV spectrograph a AIP

The AIP is part of the ANDES consortium, with ANDES being the planned high-resolution, wide wavelength coverage spectrograph for the Extremely Large Telescope (ELT). The AIP is in charge of developing and building the UBV spectrograph of ANDES, and I am leading the UBV development as the PI. The whole ANDES spectrograph will have at least three individual spectrographs, one covering the UBV bands, one covering RIZ, and one covering YJH. An additional K-band spectrogrpah is still under discussion. ANDES…

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First paper of the PEPSI Exoplanet Transit Survey (PETS) publication series ?>

First paper of the PEPSI Exoplanet Transit Survey (PETS) publication series

Our group is in a collaboration with other groups from Germany, Italy and the US to perform the PEPSI Exoplanet Transit Survey (PETS), which investigates exoplanet atmospheres in transmission and reflection observations. The first paper of the paper series is now published, and it’s an investigation of the nature of 55 Cnc e, a small rocky exoplanet, performed by my postdoc Engin Keles. The PEPSI exoplanet transit survey (PETS) I: investigating the presence of a silicate atmosphere on the super-earth…

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Paper on tidal star-planet interaction ?>

Paper on tidal star-planet interaction

One of the major research questions in my group has reached a milestone – my PhD student Nikoleta Ilic led an investigation of the magnetic activity of planet-hosting stars that are located in wide multiple system with one or more other stars. Such systems allow us to test for an overactivity of the planet host star due to star-planet interaction (SPI) by using the other star(s) in the system as a negative, same-age control. Nikoleta found a significant correlation of…

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Paper on AU Mic’s space weather ?>

Paper on AU Mic’s space weather

A new study by our Schwarzschild Fellow Dr. Julián Alvarado-Gomez shows that the space weather of AU Mic makes the survival of exoplanet atmospheres very challenging. Simulating the Space Weather in the AU Mic System: Stellar Winds and Extreme Coronal Mass Ejections Alvarado-Gómez, Julián D.; Cohen, Ofer; Drake, Jeremy J.; Fraschetti, Federico; Poppenhaeger, Katja; Garraffo, Cecilia; Chebly, Judy; Ilin, Ekaterina; Harbach, Laura; Kochukhov, Oleg Two close-in planets have been recently found around the M-dwarf flare star AU Microscopii (AU Mic)….

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