1 code implementation • 28 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
1 code implementation • 2 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 Analysis Instrumentation and Methods for Astrophysics Earth and Planetary Astrophysics Solar and Stellar Astrophysics
1 code implementation • 28 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
1 code implementation • 9 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
1 code implementation • 7 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
3 code implementations • 17 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
2 code implementations • 4 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
1 code implementation • 12 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
1 code implementation • 18 Oct 2017 • Susan E. Thompson, Jeffrey L. Coughlin, Kelsey Hoffman, Fergal Mullally, Jessie L. Christiansen, Christopher J. Burke, Steve Bryson, Natalie Batalha, Michael R. Haas, Joseph Catanzarite, Jason F. Rowe, Geert Barentsen, Douglas A. Caldwell, Bruce D. Clarke, Jon M. Jenkins, Jie Li, David W. Latham, Jack J. Lissauer, Savita Mathur, Robert L. Morris, Shawn E. Seader, Jeffrey C. Smith, Todd C. Klaus, Joseph D. Twicken, Bill Wohler, Rachel Akeson, David R. Ciardi, William D. Cochran, Thomas Barclay, Jennifer R. Campbell, William J. Chaplin, David Charbonneau, Christopher E. Henze, Steve B. Howell, Daniel Huber, Andrej Prsa, Solange V. Ramirez, Timothy D. Morton, Jorgen Christensen-Dalsgaard, Jessie L. Dotson, Laurance Doyle, Edward W. Dunham, Andrea K. Dupree, Eric B. Ford, John C. Geary, Forrest R. Girouard, Howard Isaacson, Hans Kjeldsen, Jason H. Steffen, Elisa V. Quintana, Darin Ragozzine, Megan Shabram, Avi Shporer, Victor Silva Aguirre, Martin Still, Peter Tenenbaum, William F. Welsh, Angie Wolfgang, Khadeejah A. Zamudio, David G. Koch, William J. Borucki
For orbital periods less than 100 days the Robovetter completeness (the fraction of simulated transits that are determined to be planet candidates) across all observed stars is greater than 85%.
Earth and Planetary Astrophysics
3 code implementations • 29 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.
1 code implementation • 6 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