Search Results for author: Eric B. Ford

Found 11 papers, 11 papers with code

The Occurrence of Rocky Habitable Zone Planets Around Solar-Like Stars from Kepler Data

1 code implementation28 Oct 2020 Steve Bryson, Michelle Kunimoto, Ravi K. Kopparapu, Jeffrey L. Coughlin, William J. Borucki, David Koch, Victor Silva Aguirre, Christopher Allen, Geert Barentsen, Natalie. M. Batalha, Travis Berger, Alan Boss, Lars A. Buchhave, Christopher J. Burke, Douglas A. Caldwell, Jennifer R. Campbell, Joseph Catanzarite, Hema Chandrasekharan, William J. Chaplin, Jessie L. Christiansen, Jorgen Christensen-Dalsgaard, David R. Ciardi, Bruce D. Clarke, William D. Cochran, Jessie L. Dotson, Laurance R. Doyle, Eduardo Seperuelo Duarte, Edward W. Dunham, Andrea K. Dupree, Michael Endl, James L. Fanson, Eric B. Ford, Maura Fujieh, Thomas N. Gautier III, John C. Geary, Ronald L Gilliland, Forrest R. Girouard, Alan Gould, Michael R. Haas, Christopher E. Henze, Matthew J. Holman, Andrew Howard, Steve B. Howell, Daniel Huber, Roger C. Hunter, Jon M. Jenkins, Hans Kjeldsen, Jeffery Kolodziejczak, Kipp Larson, David W. Latham, Jie Li, Savita Mathur, Soren Meibom, Chris Middour, Robert L. Morris, Timothy D. Morton, Fergal Mullally, Susan E. Mullally, David Pletcher, Andrej Prsa, Samuel N. Quinn, Elisa V. Quintana, Darin Ragozzine, Solange V. Ramirez, Dwight T. Sanderfer, Dimitar Sasselov, Shawn E. Seader, Megan Shabram, Avi Shporer, Jeffrey C. Smith, Jason H. Steffen, Martin Still, Guillermo Torres, John Troeltzsch, Joseph D. Twicken, Akm Kamal Uddin, Jeffrey E. Van Cleve, Janice Voss, Lauren Weiss, William F. Welsh, Bill Wohler, Khadeejah A Zamudio

We present occurrence rates for rocky planets in the habitable zones (HZ) of main-sequence dwarf stars based on the Kepler DR25 planet candidate catalog and Gaia-based stellar properties.

Earth and Planetary Astrophysics Solar and Stellar Astrophysics

Toward Extremely Precise Radial Velocities: II. A Tool For Using Multivariate Gaussian Processes to Model Stellar Activity

1 code implementation2 Sep 2020 Christian Gilbertson, Eric B. Ford, David E. Jones, David C. Stenning

Rajpaul et al. (2015) and Jones et al. (2017) proposed applying a physically motivated, multivariate Gaussian process (GP) to jointly model the apparent Doppler shift and multiple indicators of stellar activity as a function of time, so as to separate the planetary signal from various forms of stellar variability.

Gaussian Processes Time Series Instrumentation and Methods for Astrophysics Earth and Planetary Astrophysics Solar and Stellar Astrophysics

Architectures of Exoplanetary Systems: Eccentricity and Mutual Inclination Distributions of AMD-Stable Planetary Systems

1 code implementation28 Jul 2020 Matthias Y. He, Eric B. Ford, Darin Ragozzine, Daniel Carrera

We show that distributing a planetary system's maximum AMD amongst its planets results in a multiplicity-dependent distribution of eccentricities and mutual inclinations.

Earth and Planetary Astrophysics

Architectures of Exoplanetary Systems. II: An Intrinsic Relation between Planetary System Occurrence and Spectral Type for Kepler's FGK Dwarfs

1 code implementation9 Mar 2020 Matthias Y. He, Eric B. Ford, Darin Ragozzine

He, Ford, & Ragozzine (2019) (arXiv:1907. 07773) applied forward modelling to infer the distribution of intrinsic architectures of planetary systems, developed a clustered Poisson point process model for exoplanetary systems (SysSim) to reproduce the marginal distributions of the observed Kepler population, and showed that orbital periods and planet radii are clustered within a given planetary system.

Earth and Planetary Astrophysics Solar and Stellar Astrophysics

Occurrence Rates of Planets Orbiting M Stars: Applying ABC to Kepler DR25, Gaia DR2, and 2MASS Data

1 code implementation7 Feb 2020 Danley C. Hsu, Eric B. Ford, Ryan Terrien

We caution that occurrence rate estimates for Kepler M stars are sensitive to the choice of prior due to the small sample of target stars and planet candidates.

Earth and Planetary Astrophysics Solar and Stellar Astrophysics

Architectures of Exoplanetary Systems. I: A Clustered Forward Model for Exoplanetary Systems around Kepler's FGK Stars

3 code implementations17 Jul 2019 Matthias Y. He, Eric B. Ford, Darin Ragozzine

We find that the Kepler dichotomy is evidence for a population of highly-inclined planetary systems and is unlikely to be solely due to a population of intrinsically single planet systems.

Earth and Planetary Astrophysics

Occurrence Rates of Planets orbiting FGK Stars: Combining Kepler DR25, Gaia DR2 and Bayesian Inference

2 code implementations4 Feb 2019 Danley C. Hsu, Eric B. Ford, Darin Ragozzine, Keir Ashby

We characterize the occurrence rate of planets, ranging in size from 0. 5-16 R$_\oplus$, orbiting FGK stars with orbital periods from 0. 5-500 days.

Earth and Planetary Astrophysics

Quantifying the Evidence for a Planet in Radial Velocity Data

1 code implementation12 Jun 2018 Benjamin E. Nelson, Eric B. Ford, Johannes Buchner, Ryan Cloutier, Rodrigo F. Díaz, João P. Faria, Vinesh M. Rajpaul, Surangkhana Rukdee

We found the dispersion in $\widehat{\mathcal{Z}}$ across different methods grew with increasing $n$-planet models: $\sim\,$3 for 0-planets, $\sim\,$10 for 1-planet, $\sim\,$$10^2$-$10^3$ for 2-planets, and $>\,$$10^4$ for 3-planets.

Earth and Planetary Astrophysics Instrumentation and Methods for Astrophysics

Geometric adaptive Monte Carlo in random environment

3 code implementations29 Aug 2016 Theodore Papamarkou, Alexey Lindo, Eric B. Ford

This paper analyzes the computational complexity of manifold Langevin Monte Carlo and proposes a geometric adaptive Monte Carlo sampler aimed at balancing the benefits of exploiting local geometry with computational cost to achieve a high effective sample size for a given computational cost.

Transit Timing Observations from Kepler. IX. Catalog of the Full Long-Cadence Data Set

1 code implementation6 Jun 2016 Tomer Holczer, Tsevi Mazeh, Gil Nachmani, Daniel Jontof-Hutter, Eric B. Ford, Daniel Fabrycky, Darin Ragozzine, Mackenzie Kane, Jason H. Steffen

For 779 KOIs with high enough SNRs, we derived the timing, duration and depth of 69, 914 transits.

Earth and Planetary Astrophysics

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