183 citations · 5.1k across the 134 of their papers we have counts for
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The Possible Tidal Demise of Kepler's First Planetary System
Shreyas Vissapragada, Ashley Chontos, Michael Greklek-McKeon +6
We present evidence of tidally-driven inspiral in the Kepler-1658 (KOI-4) system, which consists of a giant planet (1.1, 5.9) orbiting an evolved host s…
NEID Reveals that The Young Warm Neptune TOI-2076 b Has a Low Obliquity
Robert C. Frazier, Gudmundur Stefansson, Suvrath Mahadevan +27
TOI-2076 b is a sub-Neptune-sized planet () that transits a young () bright () K-dwarf hosting a system of three transiting…
Radial velocity confirmation of a hot super-Neptune discovered by TESS with a warm Saturn-mass companion
E. Knudstrup, D. Gandolfi, G. Nowak +59
We report the discovery and confirmation of the planetary system TOI-1288. This late G dwarf harbours two planets: TOI-1288 b and TOI-1288 c. We combine TESS space-borne and ground…
TOI-1136 is a Young, Coplanar, Aligned Planetary System in a Pristine Resonant Chain
Fei Dai, Kento Masuda, Corey Beard +60
Convergent disk migration has long been suspected to be responsible for forming planetary systems with a chain of mean-motion resonances (MMR). Dynamical evolution over time could…
HD 20329b: An ultra-short-period planet around a solar-type star found by TESS
F. Murgas, G. Nowak, T. Masseron +45
We used TESS light curves and HARPS-N spectrograph radial velocity measurements to establish the physical properties of the transiting exoplanet candidate found around the star HD…
Planet Engulfment Detections are Rare According to Observations and Stellar Modeling
Aida Behmard, Fei Dai, John M. Brewer +2
Dynamical evolution within planetary systems can cause planets to be engulfed by their host stars. Following engulfment, the stellar photosphere abundance pattern will reflect accr…
TOI-561 b: A Low Density Ultra-Short Period "Rocky" Planet around a Metal-Poor Star
Casey Brinkman, Lauren M. Weiss, Fei Dai +22
TOI-561 is a galactic thick disk star hosting an ultra-short period (0.45 day orbit) planet with a radius of 1.37 R, making it one of the most metal-poor ([Fe/H] = -0.41…
Non-detection of He I in the atmosphere of GJ1214b with Keck/NIRSPEC, at a time of minimal telluric contamination
Jessica J. Spake, Antonija Oklopčić, Lynne. A. Hillenbrand +7
Observations of helium in exoplanet atmospheres may reveal the presence of large gaseous envelopes, and indicate ongoing atmospheric escape. Orell-Miquel et al. (2022) used CARMENE…
TESS-Keck Survey XIV: Two giant exoplanets from the Distant Giants Survey
Judah E. Van Zandt, Erik A. Petigura, Mason MacDougall +42
We present the Distant Giants Survey, a three-year radial velocity (RV) campaign to measure P(DG|CS), the conditional occurrence of distant giant planets (DG; M_p ~ 0.3 - 13 M_J, P…
A Tendency Toward Alignment in Single-Star Warm Jupiter Systems
Malena Rice, Songhu Wang, Xian-Yu Wang +9
The distribution of spin-orbit angles for systems with wide-separation, tidally detached exoplanets offers a unique constraint on the prevalence of dynamically violent planetary ev…
Detection of Atmospheric Escape from Four Young Mini Neptunes
Michael Zhang, Heather A. Knutson, Fei Dai +5
We use Keck/NIRSPEC to survey a sample of of young (1 Gyr), short period mini Neptunes orbiting nearby K dwargs to measure their mass loss via the metastable helium line. We det…
The TESS-Keck Survey. XIII. An Eccentric Hot Neptune with a Similar-Mass Outer Companion around TOI-1272
Mason G. MacDougall, Erik A. Petigura, Tara Fetherolf +58
We report the discovery of an eccentric hot Neptune and a non-transiting outer planet around TOI-1272. We identified the eccentricity of the inner planet, with an orbital period of…
The TESS Grand Unified Hot Jupiter Survey. I. Ten TESS Planets
Samuel W. Yee, Joshua N. Winn, Joel D. Hartman +69
We report the discovery of ten short-period giant planets (TOI-2193A b, TOI-2207 b, TOI-2236 b, TOI-2421 b, TOI-2567 b, TOI-2570 b, TOI-3331 b, TOI-3540A b, TOI-3693 b, TOI-4137 b)…
A low-eccentricity migration pathway for a 13-h-period Earth analogue in a four-planet system
Luisa Maria Serrano, Davide Gandolfi, Alexander J. Mustill +47
It is commonly accepted that exoplanets with orbital periods shorter than 1 day, also known as ultra-short period (USP) planets, formed further out within their natal protoplanetar…
The TESS-Keck Survey. XI. Mass Measurements for Four Transiting sub-Neptunes orbiting K dwarf TOI-1246
Emma V. Turtelboom, Lauren M. Weiss, Courtney D. Dressing +78
Multi-planet systems are valuable arenas for investigating exoplanet architectures and comparing planetary siblings. TOI-1246 is one such system, with a moderately bright K dwarf (…
The Upper Edge of the Neptune Desert Is Stable Against Photoevaporation
Shreyas Vissapragada, Heather A. Knutson, Michael Greklek-McKeon +9
Transit surveys indicate that there is a deficit of Neptune-sized planets on close-in orbits. If this ``Neptune desert' is entirely cleared out by atmospheric mass loss, then plane…
Stellar Companions to TESS Objects of Interest: A Test of Planet-Companion Alignment
Aida Behmard, Fei Dai, Andrew W. Howard
We present a catalog of stellar companions to host stars of Transiting Exoplanet Survey Satellite Objects of Interest (TOIs) identified from a marginalized likelihood ratio test th…
Scaling K2. V. Statistical Validation of 60 New Exoplanets From K2 Campaigns 2-18
Jessie L. Christiansen, Sakhee Bhure, Jon K. Zink +39
The NASA K2 mission, salvaged from the hardware failures of the Kepler telescope, has continued Kepler's planet-hunting success. It has revealed nearly 500 transiting planets aroun…
The First Near-Infrared Transmission Spectrum of HIP 41378 f, a Low-Mass Temperate Jovian World in a Multi-Planet System
Munazza K. Alam, James Kirk, Courtney D. Dressing +22
We present a near-infrared transmission spectrum of the long period (P=542 days), temperate (=294 K) giant planet HIP 41378 f obtained with the Wide-Field Camera 3 (WFC3) i…
The Maximum Mass-Loss Efficiency for a Photoionization-Driven Isothermal Parker Wind
Shreyas Vissapragada, Heather A. Knutson, Leonardo A. dos Santos +2
Observations of present-day mass-loss rates for close-in transiting exoplanets provide a crucial check on models of planetary evolution. One common approach is to model the planeta…
TESS Giants Transiting Giants II: The hottest Jupiters orbiting evolved stars
Samuel K. Grunblatt, Nicholas Saunders, Meng Sun +42
Giant planets on short-period orbits are predicted to be inflated and eventually engulfed by their host stars. However, the detailed timescales and stages of these processes are no…