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Pierre-Alexis Roy

university of california

18H-index
54Paper Count
1.8KCitation Count
Published Papers 19
Publication Date
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Diversity in the haziness and chemistry of temperate sub-Neptunes
errNature Astronomy
IF14.3
err2025-12-12
err0
errOAAI
errPierre-Alexis Roy; Björn Benneke; Marylou Fournier-Tondreau; Louis-Philippe Coulombe; Caroline Piaulet-Ghorayeb; David Lafrenière; Romain Allart; Nicolas B. Cowan; Lisa Dang; Doug Johnstone; Adam B. Langeveld; Stefan Pelletier; Michael Radica; Jake Taylor; Loïc Albert; René Doyon; Laura Flagg; Ray Jayawardhana; Ryan J. MacDonald; Jake D. Turner
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Continuous helium absorption from both the leading and trailing tails of WASP-107 b
errNature Astronomy
IF14.3
err2025-12-01
err0
PREAI
errVigneshwaran Krishnamurthy; Yann Carteret; Caroline Piaulet-Ghorayeb; Jared Splinter; Dhvani Doshi; Michael Radica; Louis-Philippe Coulombe; Romain Allart; Vincent Bourrier; Nicolas B. Cowan; René Doyon; David Lafrenière; Loïc Albert; Björn Benneke; Lisa Dang; Ray Jayawardhana; Doug Johnstone; Lisa Kaltenegger; Adam B. Langeveld; Stefan Pelletier; Jason F. Rowe; Pierre-Alexis Roy; Jake Taylor; Jake D. Turner
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Possible Evidence for the Presence of Volatiles on the Warm Super-Earth TOI-270 b
errastronomical journal
IF0
err2025-09-17
err0
errOAAI
errLouis-Philippe Coulombe; Björn Benneke; Joshua Krissansen-Totton; Alexandrine L’Heureux; Caroline Piaulet-Ghorayeb; Michael Radica; Pierre-Alexis Roy; Eva-Maria Ahrer; Charles Cadieux; Yamila Miguel; Hilke E. Schlichting; Elisa Delgado-Mena; Christopher Monaghan; Hanna Adamski; Eshan Raul; Ryan Cloutier; Thaddeus D. Komacek; Jake Taylor; Cyril Gapp; Romain Allart; François Bouchy; Bruno L. Canto Martins; Neil J. Cook; René Doyon; Thomas M. Evans-Soma; Pierre Larue; Alejandro Suárez Mascareño; Joost P. Wardenier
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Strict Limits on Potential Secondary Atmospheres on the Temperate Rocky Exo-Earth TRAPPIST-1 d
errastrophysical journal
IF0
err2025-08-13
err0
PREAI
errCaroline Piaulet-Ghorayeb; Björn Benneke; Martin Turbet; Keavin Moore; Pierre-Alexis Roy; Olivia Lim; René Doyon; Thomas J. Fauchez; Loïc Albert; Michael Radica; Louis-Philippe Coulombe; David Lafrenière; Nicolas B. Cowan; Danika Belzile; Kamrul Musfirat; Mehramat Kaur; Alexandrine L’Heureux; Doug Johnstone; Ryan J. MacDonald; Romain Allart; Lisa Dang; Lisa Kaltenegger; Stefan Pelletier; Jason F. Rowe; Jake Taylor; Jake D. Turner
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Detailed Architecture of the L 98-59 System and Confirmation of a Fifth Planet in the Habitable Zone
errastronomical journal
IF0
err2025-08-08
err0
PREAI
errCharles Cadieux; Alexandrine L’Heureux; Caroline Piaulet-Ghorayeb; René Doyon; Étienne Artigau; Neil J. Cook; Louis-Philippe Coulombe; Pierre-Alexis Roy; David Lafrenière; Pierrot Lamontagne; Michael Radica; Björn Benneke; Eva-Maria Ahrer; Drew Weisserman; Ryan Cloutier
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Escaping Helium and a Highly Muted Spectrum Suggest a Metal-enriched Atmosphere on Sub-Neptune GJ 3090 b from JWST Transit Spectroscopy
errASTROPHYSICAL JOURNAL LETTERS
IF11.7
err2025-05-15
err0
errOAAI
errAhrer, Eva-Maria; Radica, Michael; Piaulet-Ghorayeb, Caroline; Raul, Eshan; Wiser, Lindsey; Welbanks, Luis; Acuna, Lorena; Allart, Romain; Coulombe, Louis-Philippe; Louca, Amy; MacDonald, Ryan; Saidel, Morgan; Evans-Soma, Thomas M.; Benneke, Bjorn; Christie, Duncan; Beatty, Thomas G.; Cadieux, Charles; Cloutier, Ryan; Doyon, Rene; Fortney, Jonathan J.; Gagnebin, Anna; Gapp, Cyril; Innes, Hamish; Knutson, Heather A.; Komacek, Thaddeus; Krissansen-Totton, Joshua; Miguel, Yamila; Pierrehumbert, Raymond; Roy, Pierre-Alexis; Schlichting, Hilke E.
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Transmission spectroscopy of WASP-52 b with JWST NIRISS: water and helium atmospheric absorption, alongside prominent star-spot crossings
errMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
IF4.8
err2025-05-01
err0
errOAAI
errFournier-Tondreau, Marylou; Pan, Yanbo; Morel, Kim; Lafreniere, David; MacDonald, Ryan J.; Coulombe, Louis-Philippe; Allart, Romain; Albert, Loic; Radica, Michael; Piaulet-Ghorayeb, Caroline; Roy, Pierre-Alexis; Pelletier, Stefan; Dang, Lisa; Doyon, Rene; Benneke, Bjorn; Cowan, Nicolas B.; Darveau-Bernier, Antoine; Lim, Olivia; Artigau, Etienne; Johnstone, Doug; Kaltenegger, Lisa; Taylor, Jake; Flagg, Laura
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Low 4.5 μm Dayside Emission Disfavors a Dark Bare-rock Scenario for the Hot Super-Earth TOI-431 b
errASTRONOMICAL JOURNAL
IF5.1
err2025-04-02
err0
errOAAI
errMonaghan, Christopher; Roy, Pierre-Alexis; Benneke, Bjorn; Crossfield, Ian J. M.; Coulombe, Louis-Philippe; Piaulet-Ghorayeb, Caroline; Kreidberg, Laura; Dressing, Courtney D.; Kane, Stephen R.; Dragomir, Diana; Werner, Michael W.; Parmentier, Vivien; Christiansen, Jessie L.; Morales, Farisa Y.; Berardo, David; Gorjian, Varoujan
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Biases in Exoplanet Transmission Spectra Introduced by Limb-darkening Parametrization
errASTRONOMICAL JOURNAL
IF5.1
err2024-10-29
err2
errOAAI
errCoulombe, Louis-Philippe; Roy, Pierre-Alexis; Benneke, Bjorn
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JWST/NIRISS Reveals the Water-rich Steam World Atmosphere of GJ 9827 d
errASTROPHYSICAL JOURNAL LETTERS
IF11.7
err2024-10-04
err1
errOAAI
errPiaulet-Ghorayeb, Caroline; Benneke, Bjoern; Radica, Michael; Raul, Eshan; Coulombe, Louis-Philippe; Ahrer, Eva-Maria; Kubyshkina, Daria; Howard, Ward S.; Krissansen-Totton, Joshua; MacDonald, Ryan J.; Roy, Pierre-Alexis; Louca, Amy; Christie, Duncan; Fournier-Tondreau, Marylou; Allart, Romain; Miguel, Yamila; Schlichting, Hilke E.; Welbanks, Luis; Cadieux, Charles; Dorn, Caroline; Evans-Soma, Thomas M.; Fortney, Jonathan J.; Pierrehumbert, Raymond; Lafreniere, David; Acuna, Lorena; Komacek, Thaddeus; Innes, Hamish; Beatty, Thomas G.; Cloutier, Ryan; Doyon, Rene; Gagnebin, Anna; Gapp, Cyril; Knutson, Heather A.
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A roadmap for the atmospheric characterization of terrestrial exoplanets with JWST
errNATURE ASTRONOMY
IF14.3
err2024-07-15
err0
PREAI
errde Wit, Julien; Doyon, Rene; Rackham, Benjamin V.; Lim, Olivia; Ducrot, Elsa; Kreidberg, Laura; Benneke, Bjoern; Ribas, Ignasi; Berardo, David; Niraula, Prajwal; Iyer, Aishwarya; Shapiro, Alexander; Kostogryz, Nadiia; Witzke, Veronika; Gillon, Michael; Agol, Eric; Meadows, Victoria; Burgasser, Adam J.; Owen, James E.; Fortney, Jonathan J.; Selsis, Franck; Bello-Arufe, Aaron; de Beurs, Zoe; Bolmont, Emeline; Cowan, Nicolas; Dong, Chuanfei; Drake, Jeremy J.; Garcia, Lionel; Greene, Thomas; Haworth, Thomas; Hu, Renyu; Kane, Stephen R.; Kervella, Pierre; Koll, Daniel; Krissansen-Totton, Joshua; Lagage, Pierre-Olivier; Lichtenberg, Tim; Lustig-Yaeger, Jacob; Lingam, Manasvi; Turbet, Martin; Seager, Sara; Barkaoui, Khalid; Bell, Taylor J.; Burdanov, Artem; Cadieux, Charles; Charnay, Benjamin; Cloutier, Ryan; Cook, Neil J.; Correia, Alexandre C. M.; Dang, Lisa; Daylan, Tansu; Delrez, Laetitia; Edwards, Billy; Fauchez, Thomas J.; Flagg, Laura; Fraschetti, Federico; Haqq-Misra, Jacob; Huang, Ziyu; Iro, Nicolas; Jayawardhana, Ray; Jehin, Emmanuel; Jin, Meng; Kite, Edwin; Kitzmann, Daniel; Kral, Quentin; Lafreniere, David; Libert, Anne-Sophie; Liu, Beibei; Mohanty, Subhanjoy; Morris, Brett M.; Murray, Catriona A.; Piaulet, Caroline; Pozuelos, Francisco J.; Radica, Michael; Ranjan, Sukrit; Rathcke, Alexander; Roy, Pierre-Alexis; Schwieterman, Edward W.; Turner, Jake D.; Triaud, Amaury; Way, Michael J.
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Muted Features in the JWST NIRISS Transmission Spectrum of Hot Neptune LTT 9779b
errASTROPHYSICAL JOURNAL LETTERS
IF11.7
err2024-02-08
err6
errOAAI
errRadica, Michael; Coulombe, Louis-Philippe; Taylor, Jake; Albert, Loic; Allart, Romain; Benneke, Bjoern; Cowan, Nicolas B.; Dang, Lisa; Lafreniere, David; Thorngren, Daniel; Artigau, Etienne; Doyon, Rene; Flagg, Laura; Johnstone, Doug; Pelletier, Stefan; Roy, Pierre-Alexis
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Characterizing the Near-infrared Spectra of Flares from TRAPPIST-1 during JWST Transit Spectroscopy Observations
errASTROPHYSICAL JOURNAL
IF5.4
err2023-12-06
err17
errOAAI
errHoward, Ward S.; Kowalski, Adam F.; Flagg, Laura; Macgregor, Meredith A.; Lim, Olivia; Radica, Michael; Piaulet, Caroline; Roy, Pierre-Alexis; Lafreniere, David; Benneke, Bjorn; Brown, Alexander; Espinoza, Nestor; Doyon, Rene; Coulombe, Louis-Philippe; Johnstone, Doug; Cowan, Nicolas B.; Jayawardhana, Ray; Turner, Jake D.; Dang, Lisa
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Atmospheric Reconnaissance of TRAPPIST-1 b with JWST/NIRISS: Evidence for Strong Stellar Contamination in the Transmission Spectra
errASTROPHYSICAL JOURNAL LETTERS
IF11.7
err2023-09-22
err44
errOAAI
errLim, Olivia; Benneke, Bjorn; Doyon, Rene; MacDonald, Ryan J.; Piaulet, Caroline; Artigau, Etienne; Coulombe, Louis-Philippe; Radica, Michael; L'Heureux, Alexandrine; Albert, Loic; Rackham, Benjamin V.; de Wit, Julien; Salhi, Salma; Roy, Pierre-Alexis; Flagg, Laura; Fournier-Tondreau, Marylou; Taylor, Jake; Cook, Neil J.; Lafreniere, David; Cowan, Nicolas B.; Kaltenegger, Lisa; Rowe, Jason F.; Espinoza, Nestor; Dang, Lisa; Darveau-Bernier, Antoine
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Water Absorption in the Transmission Spectrum of the Water World Candidate GJ 9827 d
errASTROPHYSICAL JOURNAL LETTERS
IF11.7
err2023-09-12
err9
errOAAI
errRoy, Pierre-Alexis; Benneke, Bjorn; Piaulet, Caroline; Gully-Santiago, Michael A.; Crossfield, Ian J. M.; Morley, Caroline V.; Kreidberg, Laura; Mikal-Evans, Thomas; Brande, Jonathan; Delisle, Simon; Greene, Thomas P.; Hardegree-Ullman, Kevin K.; Barman, Travis; Christiansen, Jessie L.; Dragomir, Diana; Fortney, Jonathan J.; Howard, Andrew W.; Kosiarek, Molly R.; Lothringer, Joshua D.
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The Near Infrared Imager and Slitless Spectrograph for the James Webb Space Telescope. III. Single Object Slitless Spectroscopy
errPUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
IF7.7
err2023-07-20
err23
errOAAI
errAlbert, Loic; Lafreniere, David; Rene, Doyon; Artigau, Etienne; Volk, Kevin; Goudfrooij, Paul; Martel, Andre R.; Radica, Michael; Rowe, Jason; Espinoza, Nestor; Roy, Arpita; Filippazzo, Joseph C.; Darveau-Bernier, Antoine; Talens, Geert Jan; Sivaramakrishnan, Anand; Willott, Chris J.; Fullerton, Alexander W.; LaMassa, Stephanie; Hutchings, John B.; Rowlands, Neil; Vila, M. Begona; Zhou, Julia; Aldridge, David; Maszkiewicz, Michael; Beaulieu, Mathilde; Cook, Neil J.; Piaulet, Caroline; Roy, Pierre-Alexis; Lamontagne, Pierrot; Morel, Kim; Frost, William; Salhi, Salma; Coulombe, Louis-Philippe; Benneke, Bjoern; MacDonald, Ryan J.; Johnstone, Doug; Turner, Jake D.; Fournier-Tondreau, Marylou; Allart, Romain; Kaltenegger, Lisa
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Awesome SOSS: transmission spectroscopy of WASP-96b with NIRISS/SOSS
errMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
IF4.8
err2023-06-14
err23
errOAAI
errRadica, Michael; Welbanks, Luis; Espinoza, Nestor; Taylor, Jake; Coulombe, Louis-Philippe; Feinstein, Adina D.; Goyal, Jayesh; Scarsdale, Nicholas; Albert, Loic; Baghel, Priyanka; Bean, Jacob L.; Blecic, Jasmina; Lafreniere, David; MacDonald, Ryan J.; Zamyatina, Maria; Allart, Romain; Artigau, Etienne; Batalha, Natasha E.; Cook, Neil James; Cowan, Nicolas B.; Dang, Lisa; Doyon, Rene; Fournier-Tondreau, Marylou; Johnstone, Doug; Line, Michael R.; Moran, Sarah E.; Mukherjee, Sagnick; Pelletier, Stefan; Roy, Pierre-Alexis; Talens, Geert Jan; Filippazzo, Joseph; Pontoppidan, Klaus; Volk, Kevin
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Is the Hot, Dense Sub-Neptune TOI-824 b an Exposed Neptune Mantle? Spitzer Detection of the Hot Dayside and Reanalysis of the Interior Composition
errASTROPHYSICAL JOURNAL
IF5.4
err2022-12-14
err1
errOAAI
errRoy, Pierre-Alexis; Benneke, Bjorn; Piaulet, Caroline; Crossfield, Ian J. M.; Kreidberg, Laura; Dragomir, Diana; Deming, Drake; Werner, Michael W.; Parmentier, Vivien; Christiansen, Jessie L.; Dressing, Courtney D.; Kane, Stephen R.; Morales, Farisa Y.
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ATOCA: an Algorithm to Treat Order Contamination. Application to the NIRISS SOSS Mode
errPUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
IF7.7
err2022-09-28
err19
errOAAI
errDarveau-Bernier, Antoine; Albert, Loic; Talens, Geert Jan; Lafreniere, David; Radica, Michael; Doyon, Rene; Cook, Neil J.; Rowe, Jason F.; Allart, Romain; Artigau, Etienne; Benneke, Bjorn; Cowan, Nicolas; Dang, Lisa; Espinoza, Nestor; Johnstone, Doug; Kaltenegger, Lisa; Lim, Olivia; Pauly, Tyler; Pelletier, Stefan; Piaulet, Caroline; Roy, Arpita; Roy, Pierre-Alexis; Splinter, Jared; Taylor, Jake; Turner, Jake D.
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Research Directions

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Co-authors
Cooperation Journals
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Jonathan J. Fortney
H-index: 107 · Papers: 1.0K
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F. Bouchy
H-index: 99 · Papers: 1.1K
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T. M. Evans
H-index: 95 · Papers: 364
A
Andrew W. Howard
H-index: 83 · Papers: 765
I
I. Ribas
H-index: 79 · Papers: 977
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