583 citations · 4.2k across the 54 of their papers we have counts for
32 papers · 1 filter
Polka-dotted Stars: a Hierarchical Model for Mapping Stellar Surfaces Using Occultation Light Curves and the Case of TOI-3884
Sabina Sagynbayeva, Will M. Farr, Brett Morris +1
We present StarryStarryProcess, a novel hierarchical Bayesian framework for mapping stellar surfaces using exoplanet transit light curves. While previous methods relied solely on s…
Warm Jupiters Beyond the Tidal Synchronization Limit May Exhibit a Wide Range of Secondary Eclipse Depths
Emily Rauscher, Nicolas B. Cowan, Rodrigo Luger
With JWST we can now characterize the atmospheres of planets on longer orbital planets, but this moves us into a regime where we cannot assume that tidal forces from the star have…
Joint Modeling of Radial Velocities and Photometry with a Gaussian Process Framework
Quang H. Tran, Megan Bedell, Daniel Foreman-Mackey +1
Developments in the stability of modern spectrographs have led to extremely precise instrumental radial velocity (RV) measurements. For most stars, the detection limit of planetary…
The Contribution of M-Dwarf Flares to the Thermal Escape of Potentially Habitable Planet Atmospheres
Laura Neves Ribeiro do Amaral, Rory Barnes, Antígona Segura +1
The habitability of planets around M dwarfs () can be affected by the XUV (X rays + extreme UV) emission of these stars, with flares occasionally increasing t…
Hierarchical Bayesian Atmospheric Retrieval Modeling for Population Studies of Exoplanet Atmospheres: A Case Study on the Habitable Zone
Jacob Lustig-Yaeger, Kristin S. Sotzen, Kevin B. Stevenson +5
With the growing number of spectroscopic observations and observational platforms capable of exoplanet atmospheric characterization, there is a growing need for analysis techniques…
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…
Efficient and precise transit light curves for rapidly-rotating, oblate stars
Shashank Dholakia, Rodrigo Luger, Shishir Dholakia
We derive solutions to transit light curves of exoplanets orbiting rapidly-rotating stars. These stars exhibit significant oblateness and gravity darkening, a phenomenon where the…
H-alpha and Ca II Infrared Triplet Variations During a Transit of the 23 Myr Planet V1298 Tau c
Adina D. Feinstein, Benjamin T. Montet, Marshall C. Johnson +5
Young transiting exoplanets (< 100 Myr) provide crucial insight into atmospheric evolution via photoevaporation. However, transmission spectroscopy measurements to determine atmosp…
Analytic Light Curves in Reflected Light: Phase Curves, Occultations, and Non-Lambertian Scattering for Spherical Planets and Moons
Rodrigo Luger, Eric Agol, Fran Bartolić +1
We derive efficient, closed form, differentiable, and numerically stable solutions for the flux measured from a spherical planet or moon seen in reflected light, either in or out o…
Occultation mapping of Io's surface in the near-infrared I: Inferring static maps
Fran Bartolić, Rodrigo Luger, Daniel Foreman-Mackey +2
Jupiter's moon Io is the most volcanically active body in the Solar System with hundreds of active volcanoes varying in intensity on different timescales. Io has been observed duri…
Refining the transit timing and photometric analysis of TRAPPIST-1: Masses, radii, densities, dynamics, and ephemerides
Eric Agol, Caroline Dorn, Simon L. Grimm +32
We have collected transit times for the TRAPPIST-1 system with the Spitzer Space Telescope over four years. We add to these ground-based, HST and K2 transit time measurements, and…
The Young Planet DS Tuc Ab has a Low Obliquity
Benjamin T. Montet, Adina D. Feinstein, Rodrigo Luger +9
The abundance of short-period planetary systems with high orbital obliquities relative to the spin of their host stars is often taken as evidence that scattering processes play imp…
Four newborn planets transiting the young solar analog V1298 Tau
Trevor J. David, Erik A. Petigura, Rodrigo Luger +4
Exoplanets orbiting pre-main sequence stars are laboratories for studying planet evolution processes, including atmospheric loss, orbital migration, and radiative cooling. V1298 Ta…
Analytic Planetary Transit Light Curves and Derivatives for Stars with Polynomial Limb Darkening
Eric Agol, Rodrigo Luger, Daniel Foreman-Mackey
We derive analytic, closed-form solutions for the light curve of a planet transiting a star with a limb darkening profile which is a polynomial function of the stellar elevation, u…
EXOFASTv2: A public, generalized, publication-quality exoplanet modeling code
Jason D. Eastman, Joseph E. Rodriguez, Eric Agol +6
We present the next generation public exoplanet fitting software, EXOFASTv2. It is capable of fitting an arbitrary number of planets, radial velocity data sets, astrometric data se…
Detecting volcanically produced tori along orbits of exoplanets using UV spectroscopy
Kristina G. Kislyakova, Luca Fossati, Denis Shulyak +17
We suggest to use the Hubble Space Telescople (HST) follow-up observations of the TESS targets for detecting possible plasma tori along the orbits of exoplanets orbiting M dwarfs.…
Detection of Hundreds of New Planet Candidates and Eclipsing Binaries in K2 Campaigns 0-8
Ethan Kruse, Eric Agol, Rodrigo Luger +1
We implement a search for exoplanets in campaigns zero through eight (C0-8) of the K2 extension of the Kepler spacecraft. We apply a modified version of the QATS planet search algo…
No Evidence for Lunar Transit in New Analysis of Hubble Space Telescope Observations of the Kepler-1625 System
Laura Kreidberg, Rodrigo Luger, Megan Bedell
Observations of the Kepler-1625 system with the Kepler and Hubble Space Telescopes have suggested the presence of a candidate exomoon, Kepler-1625b I, a Neptune-radius satellite or…
VPLanet: The Virtual Planet Simulator
Rory Barnes, Rodrigo Luger, Russell Deitrick +14
We describe a software package called VPLanet that simulates fundamental aspects of planetary system evolution over Gyr timescales, with a focus on investigating habitable worlds.…
TESS Photometric Mapping of a Terrestrial Planet in the Habitable Zone: Detection of Clouds, Oceans, and Continents
Rodrigo Luger, Megan Bedell, Roland Vanderspek +1
To date, a handful of exoplanets have been photometrically mapped using phase-modulated reflection or emission from their surfaces, but the small amplitudes of such signals have li…
Detecting Ocean Glint on Exoplanets Using Multiphase Mapping
Jacob Lustig-Yaeger, Victoria S. Meadows, Guadalupe Tovar Mendoza +4
Rotational mapping and glint are two proposed methods to directly detect liquid water on the surface of habitable exoplanets. However, false positives for both methods may prevent…
Evolved Climates and Observational Discriminants for the TRAPPIST-1 Planetary System
Andrew P. Lincowski, Victoria S. Meadows, David Crisp +4
The TRAPPIST-1 planetary system provides an unprecedented opportunity to study terrestrial exoplanet evolution with the James Webb Space Telescope (JWST) and ground-based observato…
Planet-Planet Occultations in TRAPPIST-1 and Other Exoplanet Systems
Rodrigo Luger, Jacob Lustig-Yaeger, Eric Agol
We explore the occurrence and detectability of planet-planet occultations (PPOs) in exoplanet systems. These are events during which a planet occults the disk of another planet in…
A seven-planet resonant chain in TRAPPIST-1
Rodrigo Luger, Marko Sestovic, Ethan Kruse +30
The TRAPPIST-1 system is the first transiting planet system found orbiting an ultra-cool dwarf star. At least seven planets similar to Earth in radius and in mass were previously f…