497 citations · 5.1k across the 41 of their papers we have counts for
33 papers · 1 filter
The Featureless Transmission Spectra of Two Super-Puff Planets
Jessica E. Libby-Roberts, Zachory K. Berta-Thompson, Jean-Michel Desert +9
The Kepler mission revealed a class of planets known as ''super-puffs,'' with masses only a few times larger than Earth's but radii larger than Neptune, giving them very low mean d…
Stellar obliquities and magnetic activities of Planet-Hosting Stars and Eclipsing Binaries based on Transit Chord Correlation
Fei Dai, Joshua N. Winn, Zachory Berta-Thompson +2
The light curve of an eclipsing system shows anomalies whenever the eclipsing body passes in front of active regions on the eclipsed star. In some cases, the pattern of anomalies c…
Kepler-78 and the Ultra-Short-Period Planets
Joshua N. Winn, Roberto Sanchis-Ojeda, Saul Rappaport
Compared to the Earth, the exoplanet Kepler-78b has a similar size (1.2 ) and an orbital period a thousand times shorter (8.5 hours). It is currently the smallest planet…
Absence of a metallicity effect for ultra-short-period planets
Joshua N. Winn, Roberto Sanchis-Ojeda, Leslie Rogers +7
Ultra-short-period (USP) planets are a newly recognized class of planets with periods shorter than one day and radii smaller than about 2 Earth radii. It has been proposed that USP…
On the Detection of Non-Transiting Exoplanets with Dusty Tails
John DeVore, Saul Rappaport, Roberto Sanchis-Ojeda +2
We present a way of searching for non-transiting exoplanets with dusty tails. In the transiting case, the extinction by dust during the transit removes more light from the beam tha…
The K2-ESPRINT Project V: a short-period giant planet orbiting a subgiant star
Vincent Van Eylen, Simon Albrecht, Davide Gandolfi +31
We report on the discovery and characterization of the transiting planet K2-39b (EPIC 206247743b). With an orbital period of 4.6 days, it is the shortest-period planet orbiting a s…
Doppler Monitoring of five K2 Transiting Planetary Systems
Fei Dai, Joshua N. Winn, Simon Albrecht +21
In an effort to measure the masses of planets discovered by the NASA {\it K2} mission, we have conducted precise Doppler observations of five stars with transiting planets. We pres…
The K2-ESPRINT Project II: Spectroscopic follow-up of three exoplanet systems from Campaign 1 of K2
Vincent Van Eylen, Grzegorz Nowak, Simon Albrecht +20
We report on Doppler observations of three transiting planet candidates that were detected during Campaign 1 of the K2 mission. The Doppler observations were conducted with FIES, H…
The K2-ESPRINT Project IV: A Hot Jupiter in a Prograde Orbit with a Possible Stellar Companion
Teruyuki Hirano, Grzegorz Nowak, Masayuki Kuzuhara +19
We report on the detection and early characterization of a hot Jupiter in a 3-day orbit around K2-34 (EPIC~212110888), a metal-rich F-type star located in the K2 Cycle 5 field. Our…
The K2-ESPRINT Project III: A Close-in Super-Earth around a Metal-rich Mid-M Dwarf
Teruyuki Hirano, Akihiko Fukui, Andrew W. Mann +18
We validate a planet on a close-in orbit ( days) around K2-28 (EPIC 206318379), a metal-rich M4-type dwarf in the Campaign 3 fiel…
Characterization of the K2-19 Multiple-Transiting Planetary System via High-Dispersion Spectroscopy, AO Imaging, and Transit Timing Variations
Norio Narita, Teruyuki Hirano, Akihiko Fukui +16
K2-19 (EPIC201505350) is an interesting planetary system in which two transiting planets with radii ~ 7 (inner planet b) and ~ 4 (outer planet c) have orbit…
Tests of the planetary hypothesis for PTFO 8-8695b
Liang Yu, Joshua N. Winn, Michaël Gillon +16
The T Tauri star PTFO 8-8695 exhibits periodic fading events that have been interpreted as the transits of a giant planet on a precessing orbit. Here we present three tests of the…
A low stellar obliquity for WASP-47, a compact multiplanet system with a hot Jupiter and an ultra-short period planet
Roberto Sanchis-Ojeda, Joshua N. Winn, Fei Dai +9
We have detected the Rossiter-Mclaughlin effect during a transit of WASP-47b, the only known hot Jupiter with close planetary companions. By combining our spectroscopic observation…
The K2-ESPRINT Project. I. Discovery of the Disintegrating Rocky Planet K2-22b with a Cometary Head and Leading Tail
R. Sanchis-Ojeda, S. Rappaport, E. Pallé +28
We present the discovery of a transiting exoplanet candidate in the K2 Field-1 with an orbital period of 9.1457 hr: K2-22b. The highly variable transit depths, ranging from 0…
KELT-7b: A hot Jupiter transiting a bright V=8.54 rapidly rotating F-star
Allyson Bieryla, Karen Collins, Thomas G. Beatty +31
We report the discovery of KELT-7b, a transiting hot Jupiter with a mass of MJ, radius of RJ, and an orbital period of $2.7347749 \pm 0.000…
A Study of the Shortest-Period Planets Found With Kepler
Roberto Sanchis-Ojeda, Saul Rappaport, Joshua N. Winn +3
We present the results of a survey aimed at discovering and studying transiting planets with orbital periods shorter than one day (ultra--short-period, or USP, planets), using data…
Masses, Radii, and Orbits of Small Kepler Planets: The Transition from Gaseous to Rocky Planets
Geoffrey W. Marcy, Howard Isaacson, Andrew W. Howard +100
We report on the masses, sizes, and orbits of the planets orbiting 22 Kepler stars. There are 49 planet candidates around these stars, including 42 detected through transits and 7…
Measurements of Stellar Inclinations for Kepler Planet Candidates II: Candidate Spin-Orbit Misalignments in Single and Multiple-Transiting Systems
Teruyuki Hirano, Roberto Sanchis-Ojeda, Yoichi Takeda +3
We present a test for spin-orbit alignment for the host stars of 25 candidate planetary systems detected by the {\it Kepler} spacecraft. The inclination angle of each star's rotati…
KOI-2700b - A Planet Candidate With Dusty Effluents on a 22-Hour Orbit
S. Rappaport, T. Barclay, J. DeVore +3
Kepler planet candidate KOI-2700b (KIC 8639908b) with an orbital period of 21.84 hours exhibits a distinctly asymmetric transit profile, likely indicative of the emission of dusty…
A Rocky Composition for an Earth-sized Exoplanet
Andrew W. Howard, Roberto Sanchis-Ojeda, Geoffrey W. Marcy +7
Planets with sizes between that of Earth (with radius R) and Neptune (about 4 R) are now known to be common around Sun-like stars. Most such planets have been dis…
Stellar Spin-Orbit Misalignment in a Multiplanet System
Daniel Huber, Joshua A. Carter, Mauro Barbieri +32
Stars hosting hot Jupiters are often observed to have high obliquities, whereas stars with multiple co-planar planets have been seen to have low obliquities. This has been interpre…
Kepler-63b: A Giant Planet in a Polar Orbit around a Young Sun-like Star
Roberto Sanchis-Ojeda, Joshua N. Winn, Geoffrey W. Marcy +19
We present the discovery and characterization of a giant planet orbiting the young Sun-like star Kepler-63 (KOI-63, , K, $M_\star = 0.98\, M…
HAT-P-44b, HAT-P-45b, and HAT-P-46b: Three Transiting Hot Jupiters in Possible Multi-Planet Systems
J. D. Hartman, G. Á. Bakos, G. Torres +26
We report the discovery by the HATNet survey of three new transiting extrasolar planets orbiting moderately bright (V=13.2, 12.8 and 11.9) stars. The planets have orbital periods o…
The Roche limit for close-orbiting planets: Minimum density, composition constraints, and application to the 4.2-hour planet KOI 1843.03
Saul Rappaport, Roberto Sanchis-Ojeda, Leslie A. Rogers +2
The requirement that a planet must orbit outside of its Roche limit gives a lower limit on the planet's mean density. The minimum density depends almost entirely on the orbital per…