The radial velocity method is one of the most successful techniques for the discovery and characterization of exoplanets. Modern spectrographs promise measurement precision of ~0.2-0.5 m/s for an ideal target star. However, the intrinsic variability …
We present robust planet occurrence rates for Kepler planet candidates around M stars for planet radii $R_p=0.5−4 R_\oplus$ and orbital periods P=0.5−256 days using the approximate Bayesian computation (ABC) technique. This work incorporates the …
The angular momentum deficit (AMD) of a planetary system is a measure of its orbital excitation and a predictor of long--term stability. We adopt the AMD-stability criteria to constrain the orbital architectures for exoplanetary systems. …
To robustly detect and accurately characterize low-mass planets via Doppler planet surveys, the exoplanet community must develop statistical models capable of jointly modeling planetary perturbations and intrinsic stellar variability. Toward this …
The Kepler mission observed thousands of transiting exoplanet candidates around hundreds of thousands of FGK dwarf stars. [He, Ford, & Ragozzine (2019)](arXiv:1907.07773) applied forward modelling to infer the distribution of intrinsic architectures …
We present robust planet occurrence rates for Kepler planet candidates around M stars for planet radii Rp=0.5−4 R⊕ and orbital periods P=0.5−256 days using the approximate Bayesian computation (ABC) technique. This work incorporates the final …
Press Coverage Extrasolar Earths May Circle 1 In 6 Sunlike Stars, Says New NASA Kepler Study: Forbes, Aug 15, 2019. Wow! What if 1 in 4 sunlike stars has an Earth?: EarthSky, Aug 23, 2019. Analysis shows 1-in-6 stars may host Earth-size planets: Astronomy Now, Aug 16, 2019. How many Earth-size planets are around sun-like stars?: Penn State, Aug 14, 2019.
Press Coverage The 55 Cancri Planetary System: Fully Self-Consistent N-body Constraints and a Dynamical Analysis Solved: Mysteries of a Nearby Planetary System's Dynamics: Penn State pres release, April 22, 2014 Mysteries of a nearby planetary systems dynamics now are solved: Astronomy Magazine, April 22, 2014 Mysteries of Nearby Planetary Systems Dynamics: Astrobiology Magazine, April 23, 2014
When an exoplanet transits across the face of its host star atoms and gases in its atmosphere absorb some of the starlight at specific wavelengths. These absorption wavelengths form a unique fingerprint, allowing researchers to identify the presence of Potassium.
Press Coverage Finding New Planets: WJCB Technology Spotlight, July 13, 2010. UF astronomers pioneer new planet-observing technique: UF press release, June 24, 2010. The GTC pioneers a new technique for observing planets: IAC press release, June 24, 2010 (spanish version)