Search Results for author: B. Scott Gaudi

Found 10 papers, 3 papers with code

A Ubiquitous Unifying Degeneracy in Two-Body Microlensing Systems

no code implementations26 Nov 2021 Keming Zhang, B. Scott Gaudi, Joshua S. Bloom

While gravitational microlensing by planetary systems provides unique vistas on the properties of exoplanets, observations of a given 2-body microlensing event can often be interpreted with multiple distinct physical configurations.

Real-Time Likelihood-Free Inference of Roman Binary Microlensing Events with Amortized Neural Posterior Estimation

no code implementations10 Feb 2021 Keming Zhang, Joshua S. Bloom, B. Scott Gaudi, Francois Lanusse, Casey Lam, Jessica R. Lu

Fast and automated inference of binary-lens, single-source (2L1S) microlensing events with sampling-based Bayesian algorithms (e. g., Markov Chain Monte Carlo; MCMC) is challenged on two fronts: high computational cost of likelihood evaluations with microlensing simulation codes, and a pathological parameter space where the negative-log-likelihood surface can contain a multitude of local minima that are narrow and deep.

Classifying High-cadence Microlensing Light Curves I; Defining Features

no code implementations11 Jan 2021 Somayeh Khakpash, Joshua Pepper, Matthew Penny, B. Scott Gaudi, R. A. Street

Microlensing is a powerful tool for discovering cold exoplanets, and the The Roman Space Telescope microlensing survey will discover over 1000 such planets.

Earth and Planetary Astrophysics Astrophysics of Galaxies Instrumentation and Methods for Astrophysics Solar and Stellar Astrophysics

TESS Delivers Five New Hot Giant Planets Orbiting Bright Stars from the Full Frame Images

no code implementations5 Jan 2021 Joseph E. Rodriguez, Samuel N. Quinn, George Zhou, Andrew Vanderburg, Louise D. Nielsen, Robert A. Wittenmyer, Rafael Brahm, Phillip A. Reed, Chelsea X. Huang, Sydney Vach, David R. Ciardi, Ryan J. Oelkers, Keivan G. Stassun, Coel Hellier, B. Scott Gaudi, Jason D. Eastman, Karen A. Collins, Allyson Bieryla, Sam Christian, David W. Latham, Ilaria Carleo, Duncan J. Wright, Elisabeth Matthews, Erica J. Gonzales, Carl Ziegler, Courtney D. Dressing, Steve B. Howell, Thiam-Guan Tan, Justin Wittrock, Peter Plavchan, Kim K. McLeod, David Baker, Gavin Wang, Don Radford, Richard P. Schwarz, Massimiliano Esposito, George R. Ricker, Roland K. Vanderspek, Sara Seager, Joshua N. Winn, Jon M. Jenkins, Brett Addison, D. R. Anderson, Thomas Barclay, Thomas G. Beatty, Perry Berlind, Francois Bouchy, Michael Bowen, Brendan P. Bowler, C. E. Brasseur, César Briceño, Douglas A. Caldwell, Michael L. Calkins, Priyanka Chaturvedi, Guillaume Chaverot, Sudhish Chimaladinne, Jessie L. Christiansen, Kevin Collins, Ian J. M. Crossfield, Kevin Eastridge, N'estor Espinoza, Gilbert A. Esquerdo, Dax Feliz, Tyler Fenske, William Fong, Tianjun Gan, Steven Giacalone, Holden Gill, Lindsey Gordon, Alex Granados, Nolan Grieves, Eike W. Guenther, Natalia Guerrero, Thomas Henning, Christopher E. Henze, Katharine Hesse, Melissa J. Hobson, Jonathan Horner, David J. James, Eric L. N. Jensen, Mary Jimenez, Andrés Jordán, Stephen R. Kane, John Kielkopf, Kingsley Kim, Rudolf B. Kuhn, Natasha Latouf, Nicholas M. Law, Alan M. Levine, Michael B. Lund, Andrew W. Mann, Shude Mao, Rachel A. Matson, Scott McDermott, Matthew W. Mengel, Jessica Mink, Patrick Newman, Tanner O'Dwyer, Jack Okumura, Enric Palle, Joshua Pepper, Elisa V. Quintana, Paula Sarkis, Arjun Savel, Joshua E. Schlieder, Chloe Schnaible, Avi Shporer, Ramotholo Sefako, Julia Seidel, Robert J. Siverd, Brett Skinner, Manu Stalport, Daniel J. Stevens, Caitlin Stibbards, C. G. Tinney, R. G. West, Daniel A. Yahalomi, HUI ZHANG

TOI-640 b is one of only three known hot Jupiters to have a highly inflated radius (R$_{\rm P}$ > 1. 7R$_{\rm J}$, possibly a result of its host star's evolution) and resides on an orbit with a period longer than 5 days.

Earth and Planetary Astrophysics Solar and Stellar Astrophysics

Automating Inference of Binary Microlensing Events with Neural Density Estimation

no code implementations8 Oct 2020 Keming Zhang, Joshua S. Bloom, B. Scott Gaudi, Francois Lanusse, Casey Lam, Jessica Lu

Automated inference of binary microlensing events with traditional sampling-based algorithms such as MCMC has been hampered by the slowness of the physical forward model and the pathological likelihood surface.

Density Estimation

EXOFASTv2: A public, generalized, publication-quality exoplanet modeling code

1 code implementation22 Jul 2019 Jason D. Eastman, Joseph E. Rodriguez, Eric Agol, Keivan G. Stassun, Thomas G. Beatty, Andrew Vanderburg, B. Scott Gaudi, Karen A. Collins, Rodrigo Luger

We highlight several potential pitfalls in exoplanet modeling, including the handling of eccentricity in transit-only fits, that the standard exoplanet convention for $\omega$ uses a left-handed coordinate system, contrary to most modern textbooks, how to avoid an important degeneracy when allowing negative companion masses, and a widely unappreciated, potential 10-minute ambiguity in the reported transit times.

Earth and Planetary Astrophysics Instrumentation and Methods for Astrophysics

Identifying Exoplanets with Deep Learning III: Automated Triage and Vetting of TESS Candidates

2 code implementations4 Apr 2019 Liang Yu, Andrew Vanderburg, Chelsea Huang, Christopher J. Shallue, Ian J. M. Crossfield, B. Scott Gaudi, Tansu Daylan, Anne Dattilo, David J. Armstrong, George R. Ricker, Roland K. Vanderspek, David W. Latham, Sara Seager, Jason Dittmann, John P. Doty, Ana Glidden, Samuel N. Quinn

We apply our model on new data from Sector 6, and present 335 new signals that received the highest scores in triage and vetting and were also identified as planet candidates by human vetters.

Earth and Planetary Astrophysics

Radii of 88 M Subdwarfs and Updated Radius Relations for Low-Metallicity M Dwarf Stars

1 code implementation17 Oct 2018 Aurora Y. Kesseli, J. Davy Kirkpatrick, Sergio B. Fajardo-Acosta, Matthew T. Penny, B. Scott Gaudi, Mark Veyette, Patricia C. Boeshaar, Calen B. Henderson, Michael C. Cushing, Sebastiano Calchi-Novati, Yossi Shvartzvald, Philip S. Muirhead

Metallicity controls the opacity of stellar atmospheres; in metal poor stars, hydrostatic equilibrium is reached at a smaller radius, leading to smaller radii for a given effective temperature.

Solar and Stellar Astrophysics

Predictions of the WFIRST Microlensing Survey I: Bound Planet Detection Rates

no code implementations7 Aug 2018 Matthew T. Penny, B. Scott Gaudi, Eamonn Kerins, Nicholas J. Rattenbury, Shude Mao, Annie C. Robin, Sebastiano Calchi Novati

The Wide Field InfraRed Survey Telescope (WFIRST) is the next NASA astrophysics flagship mission, to follow the James Webb Space Telescope (JWST).

Earth and Planetary Astrophysics

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