Search Results for author: Gaspard Duchêne

Found 5 papers, 3 papers with code

A coplanar circumbinary protoplanetary disk in the TWA 3 triple M dwarf system

1 code implementation23 Feb 2021 Ian Czekala, Álvaro Ribas, Nicolás Cuello, Eugene Chiang, Enrique Macías, Gaspard Duchêne, Sean M. Andrews, Catherine C. Espaillat

To better understand the influence of the B orbit on the TWA 3A circumbinary disk, we performed SPH simulations of the system and found that the outer edge of the gas disk ($r_\mathrm{outer}=8. 5\pm0. 2$ au) is most consistent with truncation from a coplanar, circular or moderately eccentric orbit, supporting the preference from the joint orbital fit.

DiskFM: A Forward Modeling Tool for Disk Analysis with Coronagraphic Instruments

no code implementations12 Dec 2020 Johan Mazoyer, Pauline Arriaga, Justin Hom, Maxwell A. Millar-Blanchaer, Christine Chen, Jason Wang, Gaspard Duchêne, Jennifer Patience, Laurent Pueyo

However, forward-modeling with disks is complicated by the fact that the disk cannot be simplified using a simple point source convolved by the PSF as the astrophysical model; all hypothetical disk morphologies must be explored to understand the subtle and non-linear effects of the PSF subtraction algorithm on the shape and local geometry of these systems.

Instrumentation and Methods for Astrophysics

Using Data Imputation for Signal Separation in High Contrast Imaging

1 code implementation2 Jan 2020 Bin Ren, Laurent Pueyo, Christine Chen, Élodie Choquet, John H. Debes, Gaspard Duchêne, François Ménard, Marshall D. Perrin

We apply it to simulated point source and circumstellar disk observations to demonstrate its proper recovery of them.

Imputation

An Exo-Kuiper Belt and An Extended Halo around HD 191089 in Scattered Light

1 code implementation31 Jul 2019 Bin Ren, Élodie Choquet, Marshall D. Perrin, Gaspard Duchêne, John H. Debes, Laurent Pueyo, Malena Rice, Christine Chen, Glenn Schneider, Thomas M. Esposito, Charles A. Poteet, Jason J. Wang, S. Mark Ammons, Megan Ansdell, Pauline Arriaga, Vanessa P. Bailey, Travis Barman, Juan Sebastián Bruzzone, Joanna Bulger, Jeffrey Chilcote, Tara Cotten, Robert J. De Rosa, Rene Doyon, Michael P. Fitzgerald, Katherine B. Follette, Stephen J. Goodsell, Benjamin L. Gerard, James R. Graham, Alexandra Z. Greenbaum, J. Brendan Hagan, Pascale Hibon, Dean C. Hines, Li-Wei Hung, Patrick Ingraham, Paul Kalas, Quinn Konopacky, James E. Larkin, Bruce Macintosh, Jérôme Maire, Franck Marchis, Christian Marois, Johan Mazoyer, François Ménard, Stanimir Metchev, Maxwell A. Millar-Blanchaer, Tushar Mittal, Magaret Moerchen, Eric L. Nielsen, Mamadou N'Diaye, Rebecca Oppenheimer, David Palmer, Jennifer Patience, Christophe Pinte, Lisa Poyneer, Abhijith Rajan, Julien Rameau, Fredrik T. Rantakyrö, Jean-Baptiste Ruffio, Dominic Ryan, Dmitry Savransky, Adam C. Schneider, Anand Sivaramakrishnan, Inseok Song, Rémi Soummer, Christopher Stark, Sandrine Thomas, Arthur Vigan, J. Kent Wallace, Kimberly Ward-Duong, Sloane Wiktorowicz, Schuyler Wolff, Marie Ygouf, Colin Norman

We have obtained Hubble Space Telescope STIS and NICMOS, and Gemini/GPI scattered light images of the HD 191089 debris disk.

Earth and Planetary Astrophysics Solar and Stellar Astrophysics

Non-negative Matrix Factorization: Robust Extraction of Extended Structures

no code implementations29 Dec 2017 Bīn Rén, Laurent Pueyo, Guangtun Ben Zhu, John Debes, Gaspard Duchêne

We apply the vectorized Non-negative Matrix Factorization (NMF) method to post-processing of direct imaging data for exoplanetary systems such as circumstellar disks.

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