Publications (14)
Retrieving Young Cloudy L-Dwarfs: A Nearby Planetary-Mass Companion BD+60 1417B and Its Isolated Red Twin W0047
Caprice L. Phillips, Jacqueline K. Faherty, Ben Burningham +11
We present an atmospheric retrieval analysis on a set of young, cloudy, red L-dwarfs -- CWISER J124332.12+600126.2 and WISEP J004701.06+680352.1 -- using the \textit{Brewster} retr…
Io's Optical Aurorae in Jupiter's Shadow
Carl Schmidt, Mikhail Sharov, Katherine de Kleer +13
Decline and recovery timescales surrounding eclipse are indicative of the controlling physical processes in Io's atmosphere. Recent studies have established that the majority of Io…
Benchmark Brown Dwarf Systems I: Chemical Abundance Analysis of FGK Stars with Wide-Separation Brown Dwarf Companions Using PEPSI
Caprice L. Phillips, Megan Bedell, Catherine Manea +11
The authors performed a high‑resolution spectroscopic survey of 32 FGK stars that host wide‑separation brown dwarf companions, deriving precise stellar parameters and abundances fo…
PEPSI Investigation, Retrieval, and Atlas of Numerous Giant Atmospheres (PIRANGA). III. Composition and winds in the atmosphere of TOI-1518 b
Connor Basinger, Marshall C. Johnson, Ji Wang +6
Ultra-hot Jupiters (UHJs) orbit close to their host stars and experience extreme conditions, making them important laboratories to explore atmospheric composition and dynamics. Tra…
Variable and super-sonic winds in the atmosphere of an ultra-hot giant planet
Anusha Pai Asnodkar, Ji Wang, Jason D. Eastman +4
Hot Jupiters receive intense irradiation from their stellar hosts. The resulting extreme environments in their atmospheres allow us to study the conditions that drive planetary atm…
Cycle times of early M dwarf stars: mean field models versus observations
Manfred Küker, Günther Rüdiger, Katalin Oláh +1
Observations of early-type M stars suggest that there are two characteristic cycle times, one of order one year for fast rotators ( day) and another of order four…
Using raytracing to derive the expected performance of STELLA's SES-VIS spectrograph
Michael Weber, Klaus Strassmeier, Manfred Woche +2
The visual STELLA echelle spectrograph (SES-VIS) is a new instrument for the STELLA-II telescope at the Izaña observatory on Tenerife. Together with the original SES spectrograph…
The GREGOR solar telescope on Tenerife
Wolfgang Schmidt, Oskar von der Lühe, Reiner Volkmer +14
2011 was a successful year for the GREGOR project. The telescope was finally completed in May with the installation of the 1.5-meter primary mirror. The installation of the first-l…
The PLATO Mission
Heike Rauer, Conny Aerts, Juan Cabrera +842
PLATO (PLAnetary Transits and Oscillations of stars) is ESA's M3 mission designed to detect and characterise extrasolar planets and perform asteroseismic monitoring of a large numb…
Stellar Imager (SI): developing and testing a predictive dynamo model for the Sun by imaging other stars
Kenneth G. Carpenter, Carolus J. Schrijver, Margarita Karovska +39
The Stellar Imager mission concept is a space-based UV/Optical interferometer designed to resolve surface magnetic activity and subsurface structure and flows of a population of Su…
PEPSI Investigation, Retrieval, and Atlas of Numerous Giant Atmospheres (PIRANGA). IV. High-Resolution Phased-Resolved Spectroscopy of The Ultra Hot Jupiter KELT-20 b
Victoria Bonidie, Marshall C. Johnson, Ji Wang +7
We present five datasets of high-resolution optical emission spectra of the ultra-hot Jupiter KELT-20 b with the PEPSI spectrograph. Using a Bayesian retrieval framework, we constr…
An Aligned Orbit for the Young Planet V1298 Tau b
Marshall C. Johnson, Trevor J. David, Erik A. Petigura +22
The alignment of planetary orbits with respect to the stellar rotation preserves information on their dynamical histories. Measuring this angle for young planets help illuminate th…
KELT-9 as an eclipsing double-lined spectroscopic binary: a unique and self-consistent solution to the system
Anusha Pai Asnodkar, Ji Wang, B. Scott Gaudi +5
Transiting hot Jupiters present a unique opportunity to measure absolute planetary masses due to the magnitude of their radial velocity signals and known orbital inclination. Measu…
H-Alpha Variability of V1298 Tau c
Everett Schlawin, Ilya Ilyin, Adina D. Feinstein +5
The 23 Myr system V1298 Tau hosts four transiting planets and is a valuable laboratory for exploring the early stages of planet evolution soon after formation of the star. We obser…