135 citations · 1.7k across the 52 of their papers we have counts for
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HST-COS Transit Spectroscopy of KELT-20b: First Detection of Excess Far-ultraviolet Absorption From an Ultra-hot Jupiter
Patrick R. Behr, Kevin France, Luca Fossati +4
KELT-20 b is an ultra-hot Jupiter with an equilibrium temperature of K orbiting a bright (V =7.6), fast-rotating (=117 km s) A2 V star. The atmosphere of KE…
Colorado Ultraviolet Transit Experiment Near-Ultraviolet Transmission Spectroscopy of the Ultra-hot Jupiter KELT-9b
Arika Egan, Kevin France, Aickara Gopinathan Sreejith +9
We present new near-ultraviolet (NUV, = 2479 3306 ) transmission spectroscopy of KELT-9b, the hottest known exoplanet, obtained with the Colorado Ultraviolet Transit Exp…
CUTE reveals escaping metals in the upper atmosphere of the ultra-hot Jupiter WASP-189b
A. G. Sreejith, Kevin France, Luca Fossati +12
Ultraviolet observations of Ultra-hot Jupiters (UHJs), exoplanets with temperatures over 2000\,K, provide us with an opportunity to investigate if and how atmospheric escape shapes…
Detection Feasibility of H in Ultra-hot Jupiter Atmospheres
Anastasia Morgan, P. Wilson Cauley, Kevin France +2
Ultra-hot Jupiters (UHJs) have recently been the focus of several atmospheric studies due to their extreme properties. While molecular hydrogen (H) plays a key role in UHJ atmo…
More Evidence for Variable Helium Absorption from HD 189733b
Michael Zhang, P. Wilson Cauley, Heather A. Knutson +5
We present a new Keck/NIRSPEC observation of metastable helium absorption from the upper atmosphere of HD 189733b, a hot Jupiter orbiting a nearby moderately active star. We measur…
Nodal Precession and Tidal Evolution of Two Hot-Jupiters: WASP-33 b and KELT-9 b
Alexander P. Stephan, Ji Wang, P. Wilson Cauley +4
Hot Jupiters orbiting rapidly rotating stars on inclined orbits undergo tidally induced nodal precession measurable over several years of observations. The Hot Jupiters WASP-33 b a…
The Habitable Zones of Rapidly Rotating Main Sequence A/F Stars
John P. Ahlers, Emeline F. Fromont, Ravi Kopparappu +2
We investigate how rapid stellar rotation commonly seen in A/F stars can influence planet habitability. Specifically, we model how rapid rotation influences a planet's irradiation…
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…
The effects of stellar gravity darkening on high-resolution transmission spectra
P. Wilson Cauley, John P. Ahlers
High-resolution transmission spectroscopy is a powerful method for probing the extended atmospheres of short-period exoplanets. With the advancement of ultra-stable echelle spectro…
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…
A data-driven approach to constraining the atmospheric temperature structure of KELT-9b
L. Fossati, D. Shulyak, A. G. Sreejith +10
Context. Observationally constraining the atmospheric temperature-pressure (TP) profile of exoplanets is an important step forward for improving planetary atmosphere models, furthe…
Time-resolved rotational velocities in the upper atmosphere of WASP-33 b
P. Wilson Cauley, Ji Wang, Evgenya L. Shkolnik +4
While steady empirical progress has been made in understanding the structure and composition of hot planet atmospheres, direct measurements of velocity signatures, including winds,…
No consistent atmospheric absorption detected for the ultra-hot Jupiter WASP-189 b
P. Wilson Cauley, Evgenya Shkolnik, Ilya Ilyin +3
We observed a partial transit of the ultra-hot Jupiter WASP-189 b with PEPSI on the LBT. We detect a highly variable transit signal in multiple atomic transitions, including H-alph…
Interpretation and diversity of exoplanetary material orbiting white dwarfs
Andrew Swan, Jay Farihi, Detlev Koester +5
Nine metal-polluted white dwarfs are observed with medium-resolution optical spectroscopy,where photospheric abundances are determined and interpreted through comparison against so…
Magnetic field strengths of hot Jupiters from signals of star-planet interactions
P. Wilson Cauley, Evgenya L. Shkolnik, Joe Llama +1
Evidence of star-planet interactions in the form of planet-modulated chromospheric emission has been noted for a number of hot Jupiters. Magnetic star-planet interactions involve t…
Evidence of magnetic star-planet interactions in the HD 189733 system from orbitally-phased Ca II K variations
P. Wilson Cauley, Evgenya L. Shkolnik, Joe Llama +2
Magnetic star-planet interactions (SPI) provide a detection method and insight into exoplanet magnetic fields and, in turn, exoplanet interiors and atmospheric environments. These…
K2-140b and K2-180b - Characterization of a hot Jupiter and a mini-Neptune from the K2 mission
J. Korth, Sz. Csizmadia, D. Gandolfi +40
We report the independent discovery and characterization of two K2 planets: K2-180b, a mini-Neptune-size planet in an 8.9-day orbit transiting a V = 12.6 mag, metal-poor ([Fe/H] =$…
Atmospheric dynamics and the variable transit of KELT-9 b
P. Wilson Cauley, Evgenya L. Shkolnik, Ilya Ilyin +3
We present a spectrally and temporally resolved detection of the optical Mg I triplet at 7.8 in the extended atmosphere of the ultra-hot Jupiter KELT-9 b, adding to the list of…
Dust Production and Depletion in Evolved Planetary Systems
J. Farihi, R. van Lieshout, P. W. Cauley +15
The infrared dust emission from the white dwarf GD 56 is found to rise and fall by 20% peak-to-peak over 11.2 yr, and is consistent with ongoing dust production and depletion. It i…
The effects of stellar activity on optical high-resolution exoplanet transmission spectra
Paul Wilson Cauley, Christoph Kuckein, Seth Redfield +4
Chromospherically sensitive atomic lines display different spectra in stellar active regions, spots, and the photosphere, raising the possibility that exoplanet transmission spectr…
Hydrogen and Sodium Absorption in the Optical Transmission Spectrum of WASP-12b
Adam G. Jensen, P. Wilson Cauley, Seth Redfield +2
We have obtained hours of medium resolution () spectroscopic exposures on the transiting exoplanet host star WASP-12, including hours while its planet,…
Transit time derivation for hot planet bow-shocks
P. Wilson Cauley, Evgenya L. Shkolnik, Joe Llama
We present an analytical estimate of hot planet bow-shock transit times that will be useful for planning observations of such signatures.
K2-155: A Bright Metal-Poor M Dwarf with Three Transiting Super-Earths
Teruyuki Hirano, Fei Dai, John H. Livingston +32
We report on the discovery of three transiting super-Earths around K2-155 (EPIC 210897587), a relatively bright early M dwarf ( mag) observed during Campaign 13 of the NAS…
Three Small Super-Earths Transiting the nearby star GJ 9827
Prajwal Niraula, Seth Redfield, Fei Dai +25
We report on the discovery of three transiting planets around GJ~9827. The planets have radii of 1.75, 1.36, and 2.10~…