HD 206893 B at High Spectral Resolution with the Keck Planet Imager and Characterizer

Authors: Ben Sappey, Quinn Konopacky, Clarissa R. Do Ó, Travis Barman, Jean-Baptiste Ruffio, Jason Wang, Christopher A. Theissen, Luke Finnerty, Jerry Xuan, Katelyn Hortsman, Dimitri Mawet, Yapeng Zhang, Julie Inglis, Nicole L. Wallack, Aniket Sanghi, Ashley Baker, Randall Bartos, Geoffrey A. Blake, Charlotte Z. Bond, Benjamin Calvin, Sylvain Cetre, Jacques-Robert Delorme, Greg Doppmann, Daniel Echeverri, Michael P. Fitzgerald, Chih-Chun Hsu, Nemanja Jovanovic, Joshua Liberman, Ronald A. López, Emily C. Martin, Evan Morris, Jacklyn Pezzato-Rovner, Caprice L. Phillips, Garreth Ruane, Tobias Schofield, Andrew Skemer, Taylor Venenciano, J. Kent Wallace, Ji Wang, Peter Wizinowich, Yinzi Xin

Source: The Astronomical Journal, Vol 169, Iss 3, p 175 (2025)

Subject Terms: Exoplanet formation, Exoplanet atmospheric composition, Exoplanet atmospheric dynamics, High resolution spectroscopy, High contrast spectroscopy, Astronomy, QB1-991

File Description: electronic resource

Relation: https://doaj.org/toc/1538-3881

Access URL: https://doaj.org/article/5bf64430bed640119e59c5842f8a485f

Vortex Fiber Nulling for Exoplanet Observations: First Direct Detection of M Dwarf Companions around HIP 21543, HIP 94666, and HIP 50319

Authors: Daniel Echeverri, Jerry W. Xuan, John D. Monnier, Jacques-Robert Delorme, Jason J. Wang, Nemanja Jovanovic, Katelyn Horstman, Garreth Ruane, Bertrand Mennesson, Eugene Serabyn, Dimitri Mawet, J. Kent Wallace, Sofia Hillman, Ashley Baker, Randall Bartos, Benjamin Calvin, Sylvain Cetre, Greg Doppmann, Luke Finnerty, Michael P. Fitzgerald, Chih-Chun Hsu, Joshua Liberman, Ronald López, Maxwell Millar-Blanchaer, Evan Morris, Jacklyn Pezzato, Jean-Baptiste Ruffio, Ben Sappey, Tobias Schofield, Andrew J. Skemer, Ji Wang, Yinzi Xin, Narsireddy Anugu, Sorabh Chhabra, Noura Ibrahim, Stefan Kraus, Gail H. Schaefer, Cyprien Lanthermann

Source: The Astrophysical Journal Letters, Vol 965, Iss 2, p L15 (2024)

Subject Terms: Exoplanet detection methods, Astronomical instrumentation, Direct detection interferometry, High resolution spectroscopy, Companion stars, Astrophysics, QB460-466

File Description: electronic resource

Relation: https://doaj.org/toc/2041-8205

Access URL: https://doaj.org/article/29bcb249bb7044ffb9d1f1f9e09b3bc6

Validation of Elemental and Isotopic Abundances in Late-M Spectral Types with the Benchmark HIP 55507 AB System

Authors: Jerry W. Xuan, Jason Wang, Luke Finnerty, Katelyn Horstman, Simon Grimm, Anne E. Peck, Eric Nielsen, Heather A. Knutson, Dimitri Mawet, Howard Isaacson, Andrew W. Howard, Michael C. Liu, Sam Walker, Mark W. Phillips, Geoffrey A. Blake, Jean-Baptiste Ruffio, Yapeng Zhang, Julie Inglis, Nicole L. Wallack, Aniket Sanghi, Erica J. Gonzales, Fei Dai, Ashley Baker, Randall Bartos, Charlotte Z. Bond, Marta L. Bryan, Benjamin Calvin, Sylvain Cetre, Jacques-Robert Delorme, Greg Doppmann, Daniel Echeverri, Michael P. Fitzgerald, Nemanja Jovanovic, Joshua Liberman, Ronald A. López, Emily C. Martin, Evan Morris, Jacklyn Pezzato, Garreth Ruane, Ben Sappey, Tobias Schofield, Andrew Skemer, Taylor Venenciano, J. Kent Wallace, Ji Wang, Peter Wizinowich, Yinzi Xin, Shubh Agrawal, Clarissa R. Do Ó, Chih-Chun Hsu, Caprice L. Phillips

Source: The Astrophysical Journal, Vol 962, Iss 1, p 10 (2024)

Subject Terms: Atmospheric composition, Stellar atmospheres, Isotopic abundances, Radial velocity, Astrophysics, QB460-466

File Description: electronic resource

Relation: https://doaj.org/toc/1538-4357

Access URL: https://doaj.org/article/1d532df8b3dd453999dd5def32caedb8

A Survey of Protoplanetary Disks Using the Keck/NIRC2 Vortex Coronagraph

Authors: Nicole L. Wallack, Jean-Baptiste Ruffio, Garreth Ruane, Bin B. Ren, Jerry W. Xuan, Marion Villenave, Dimitri Mawet, Karl Stapelfeldt, Jason J. Wang, Michael C. Liu, Olivier Absil, Carlos Alvarez, Jaehan Bae, Charlotte Bond, Michael Bottom, Benjamin Calvin, Élodie Choquet, Valentin Christiaens, Therese Cook, Bruno Femenía Castellá, Carlos Gomez Gonzalez, Greta Guidi, Elsa Huby, Joel Kastner, Heather A. Knutson, Tiffany Meshkat, Henry Ngo, Sam Ragland, Maddalena Reggiani, Luca Ricci, Eugene Serabyn, Taichi Uyama, Jonathan P. Williams, Peter Wizinowich, Zoe Zawol, Shangjia Zhang, Zhaohuan Zhu

Source: The Astronomical Journal, Vol 168, Iss 2, p 78 (2024)

Subject Terms: Protoplanetary disks, Coronagraphic imaging, Planetary system formation, Astronomy, QB1-991

File Description: electronic resource

Relation: https://doaj.org/toc/1538-3881

Access URL: https://doaj.org/article/75b89d255bec43c38686d82063430905

RV Measurements of Directly Imaged Brown Dwarf GQ Lup B to Search for Exosatellites

Authors: Katelyn Horstman, Jean-Baptiste Ruffio, Konstantin Batygin, Dimitri Mawet, Ashley Baker, Chih-Chun Hsu, Jason J. Wang, Ji Wang, Sarah Blunt, Jerry W. Xuan, Yinzi Xin, Joshua Liberman, Shubh Agrawal, Quinn M. Konopacky, Geoffrey A. Blake, Clarissa R. Do Ó, Randall Bartos, Charlotte Z. Bond, Benjamin Calvin, Sylvain Cetre, Jacques-Robert Delorme, Greg Doppmann, Daniel Echeverri, Luke Finnerty, Michael P. Fitzgerald, Nemanja Jovanovic, Ronald López, Emily C. Martin, Evan Morris, Jacklyn Pezzato, Garreth Ruane, Ben Sappey, Tobias Schofield, Andrew Skemer, Taylor Venenciano, J. Kent Wallace, Nicole L. Wallack, Peter Wizinowich

Source: The Astronomical Journal, Vol 168, Iss 4, p 175 (2024)

Subject Terms: Radial velocity, Natural satellites (Extrasolar), Exoplanet detection methods, Direct imaging, Astronomy, QB1-991

File Description: electronic resource

Relation: https://doaj.org/toc/1538-3881

Access URL: https://doaj.org/article/c73c3afcce94454caf749c0fe29a4ed0

Efficiently Searching for Close-in Companions Around Young M Dwarfs Using a Multiyear PSF Library

Authors: Aniket Sanghi, Jerry W. Xuan, Jason J. Wang, Dimitri Mawet, Brendan P. Bowler, Henry Ngo, Marta L. Bryan, Garreth Ruane, Olivier Absil, Elsa Huby

Source: The Astronomical Journal, Vol 168, Iss 5, p 215 (2024)

Subject Terms: Exoplanet astronomy, Exoplanet detection methods, Direct imaging, High angular resolution, Extrasolar gaseous giant planets, Astronomy, QB1-991

File Description: electronic resource

Relation: https://doaj.org/toc/1538-3881

Access URL: https://doaj.org/article/4bc6b11b1a8b45b2a597875b2c4d4245

Detecting Exomoons from Radial Velocity Measurements of Self-luminous Planets: Application to Observations of HR 7672 B and Future Prospects

Authors: Jean-Baptiste Ruffio, Katelyn Horstman, Dimitri Mawet, Lee J. Rosenthal, Konstantin Batygin, Jason J. Wang, Maxwell Millar-Blanchaer, Ji Wang, Benjamin J. Fulton, Quinn M. Konopacky, Shubh Agrawal, Lea A. Hirsch, Andrew W. Howard, Sarah Blunt, Eric Nielsen, Ashley Baker, Randall Bartos, Charlotte Z. Bond, Benjamin Calvin, Sylvain Cetre, Jacques-Robert Delorme, Greg Doppmann, Daniel Echeverri, Luke Finnerty, Michael P. Fitzgerald, Nemanja Jovanovic, Ronald López, Emily C. Martin, Evan Morris, Jacklyn Pezzato, Garreth Ruane, Ben Sappey, Tobias Schofield, Andrew Skemer, Taylor Venenciano, J. Kent Wallace, Nicole L. Wallack, Peter Wizinowich, Jerry W. Xuan

Source: The Astronomical Journal, Vol 165, Iss 3, p 113 (2023)

Subject Terms: Natural satellites (Extrasolar), Direct imaging, Radial velocity, Exoplanet detection methods, Astronomy, QB1-991

File Description: electronic resource

Relation: https://doaj.org/toc/1538-3881

Access URL: https://doaj.org/article/18ab5822a5914d118a44f45d00c69a9a

From Dust to Nanodust: Resolving Circumstellar Dust from the Colliding-wind Binary Wolf-Rayet 140

Authors: Ryan M. Lau, Jason Wang, Matthew J. Hankins, Thayne Currie, Vincent Deo, Izumi Endo, Olivier Guyon, Yinuo Han, Anthony P. Jones, Nemanja Jovanovic, Julien Lozi, Anthony F. J. Moffat, Takashi Onaka, Garreth Ruane, Andreas A. C. Sander, Samaporn Tinyanont, Peter G. Tuthill, Gerd Weigelt, Peredur M. Williams, Sebastien Vievard

Source: The Astrophysical Journal, Vol 951, Iss 2, p 89 (2023)

Subject Terms: Circumstellar dust, Dust continuum emission, WC stars, Massive stars, Astrophysics, QB460-466

File Description: electronic resource

Relation: https://doaj.org/toc/1538-4357

Access URL: https://doaj.org/article/9bd216773ffa43d7a08a9226c15c504b

Retrieving C and O Abundance of HR 8799 c by Combining High- and Low-resolution Data

Authors: Ji Wang, Jason J. Wang, Jean-Baptiste Ruffio, Geoffrey A. Blake, Dimitri Mawet, Ashley Baker, Randall Bartos, Charlotte Z. Bond, Benjamin Calvin, Sylvain Cetre, Jacques-Robert Delorme, Greg Doppmann, Daniel Echeverri, Luke Finnerty, Michael P. Fitzgerald, Nemanja Jovanovic, Ronald Lopez, Emily C. Martin, Evan Morris, Jacklyn Pezzato, Sam Ragland, Garreth Ruane, Ben Sappey, Tobias Schofield, Andrew Skemer, Taylor Venenciano, J. Kent Wallace, Peter Wizinowich, Jerry W. Xuan, Marta L. Bryan, Arpita Roy, Nicole L. Wallack

Source: The Astronomical Journal, Vol 165, Iss 1, p 4 (2022)

Subject Terms: Exoplanet atmospheres, Astronomy, QB1-991

File Description: electronic resource

Relation: https://doaj.org/toc/1538-3881

Access URL: https://doaj.org/article/cdc2ad29844c4e6389a17527e1e857c9

Minimizing the Polarization Leakage of Geometric-phase Coronagraphs with Multiple Grating Pattern Combinations.

Authors: David S. Doelman, Emiel H. Por, Garreth Ruane, Michael J. Escuti, Frans Snik

Source: Publications of the Astronomical Society of the Pacific; Apr2020, Vol. 132 Issue 1010, p1-1, 1p

Subject Terms: CORONAGRAPHS, CIRCULAR polarization, LEAKAGE, LIQUID crystals, IMAGING systems, MAGNITUDE (Mathematics), CORONAL mass ejections

High-contrast Demonstration of an Apodized Vortex Coronagraph.

Authors: Jorge Llop-Sayson, Garreth Ruane, Dimitri Mawet, Nemanja Jovanovic, Carl T. Coker, Jacques-Robert Delorme, Daniel Echeverri, Jason Fucik, A J Eldorado Riggs, J. Kent Wallace

Source: Astronomical Journal; Mar2020, Vol. 159 Issue 3, p1-1, 1p

Near-infrared Imaging of a Spiral in the CQ Tau Disk.

Authors: Taichi Uyama, Takayuki Muto, Dimitri Mawet, Valentin Christiaens, Jun Hashimoto, Tomoyuki Kudo, Masayuki Kuzuhara, Garreth Ruane, Charles Beichman, Olivier Absil, Eiji Akiyama, Jaehan Bae, Michael Bottom, Elodie Choquet, Thayne Currie, Ruobing Dong, Katherine B. Follette, Misato Fukagawa, Greta Guidi, Elsa Huby

Source: Astronomical Journal; Mar2020, Vol. 159 Issue 3, p1-1, 1p

Discovery of a White Dwarf Companion to HD 159062.

Authors: Lea A. Hirsch, David R. Ciardi, Andrew W. Howard, Geoffrey W. Marcy, Garreth Ruane, Erica Gonzalez, Sarah Blunt, Justin R. Crepp, Benjamin J. Fulton, Howard Isaacson, Molly Kosiarek, Dimitri Mawet, Evan Sinukoff, Lauren Weiss

Source: Astrophysical Journal; 6/10/2019, Vol. 878 Issue 1, p1-1, 1p

Subject Terms: WHITE dwarf stars, DWARF stars, BAYESIAN analysis, ASTROMETRY, IMAGE analysis, TELESCOPES

Company/Entity: LICK Observatory, PALOMAR Observatory

Reference Star Differential Imaging of Close-in Companions and Circumstellar Disks with the NIRC2 Vortex Coronagraph at the W. M. Keck Observatory.

Authors: Garreth Ruane, Henry Ngo, Dimitri Mawet, Olivier Absil, Élodie Choquet, Therese Cook, Carlos Gomez Gonzalez, Elsa Huby, Keith Matthews, Tiffany Meshkat, Maddalena Reggiani, Eugene Serabyn, Nicole Wallack, W. Jerry Xuan

Source: Astronomical Journal; Mar2019, Vol. 157 Issue 3, p1-1, 1p

Efficient Spectroscopy of Exoplanets at Small Angular Separations with Vortex Fiber Nulling.

Authors: Garreth Ruane^1,2 gruane@caltech.edu, Ji Wang¹, Dimitri Mawet^1,3, Nemanja Jovanovic¹, Jacques-Robert Delorme¹, Bertrand Mennesson³, J. Kent Wallace³

Source: Astrophysical Journal. 11/10/2018, Vol. 867 Issue 2, p1-1. 1p.

Subject Terms: *EXTRASOLAR planets, *SPECTRUM analysis, *SPECTRAL energy distribution, *MAGNETIC fields, *GALAXIES

A Bayesian Framework for Exoplanet Direct Detection and Non-detection.

Authors: Jean-Baptiste Ruffio, Dimitri Mawet, Ian Czekala, Bruce Macintosh, Robert J. De Rosa, Garreth Ruane, Michael Bottom, Laurent Pueyo, Jason J. Wang, Lea Hirsch, Zhaohuan Zhu, Eric L. Nielsen

Source: Astronomical Journal; Nov2018, Vol. 156 Issue 5, p1-1, 1p

Characterizing the Performance of the NIRC2 Vortex Coronagraph at W. M. Keck Observatory.

Authors: W. Jerry Xuan, Dimitri Mawet, Henry Ngo, Garreth Ruane, Vanessa P. Bailey, Élodie Choquet, Olivier Absil, Carlos Alvarez, Marta Bryan, Therese Cook, Bruno Femenía Castellá, Carlos Gomez Gonzalez, Elsa Huby, Heather A. Knutson, Keith Matthews, Sam Ragland, Eugene Serabyn, Zoë Zawol

Source: Astronomical Journal; Oct2018, Vol. 156 Issue 4, p1-1, 1p

A New Standard for Assessing the Performance of High Contrast Imaging Systems.

Authors: Rebecca Jensen-Clem, Dimitri Mawet, Carlos A. Gomez Gonzalez, Olivier Absil, Ruslan Belikov, Thayne Currie, Matthew A. Kenworthy, Christian Marois, Johan Mazoyer, Garreth Ruane, Angelle Tanner, Faustine Cantalloube

Source: Astronomical Journal; Jan2018, Vol. 155 Issue 1, p1-1, 1p

Two Small Transiting Planets and a Possible Third Body Orbiting HD 106315.

Authors: Ian J. M. Crossfield, David R. Ciardi, Howard Isaacson, Andrew W. Howard, Erik A. Petigura, Lauren M. Weiss, Benjamin J. Fulton, Evan Sinukoff, Joshua E. Schlieder, Dimitri Mawet, Garreth Ruane, Imke de Pater, Katherine de Kleer, Ashley G. Davies, Jessie L. Christiansen, Courtney D. Dressing, Lea Hirsch, Björn Benneke, Justin R. Crepp, Molly Kosiarek

Source: Astronomical Journal; Jun2017, Vol. 153 Issue 6, p1-1, 1p

Observing Exoplanets with High Dispersion Coronagraphy. I. The Scientific Potential of Current and Next-generation Large Ground and Space Telescopes.

Authors: Ji Wang, Dimitri Mawet, Garreth Ruane, Renyu Hu, Björn Benneke

Source: Astronomical Journal; Apr2017, Vol. 153 Issue 4, p1-1, 1p