Jonathan Gagné
PhD Student at Univ McGill
SPIE Involvement:
Author
Area of Expertise:
Brown Dwarfs , Bayesian Inference , Solar Neighbourhood , Direct Imaging , Young Moving Groups , NIR spectroscopy
Profile Summary

I am a PhD student at Université de Montréal in the field of astrophysics. I currently work on the identification of low-mass stars and brown dwarfs in young, nearby stellar moving groups. Those are groups of stars that formed together from the same molecular cloud, several million years ago. I participate in the development of a statistical Bayesian inference tool that can identify candidate members, starting from a cross-correlation of the 2MASS and WISE near-infrared stellar catalogues. This tool drastically reduces the number of stars we have to follow-up, as well as the false-positive rates in our sample. I focus my search on late-type, cool (> M5) members to the TW Hydrae, Beta Pictoris, Tucana-Horologium, Columba, Carina, Argus and AB Doradus moving groups and associations.

I use optical spectroscopy (GMOS at Gemini-North and Gemini-South, MAGE and the Magellan telescope), as well as near-infrared spectroscopy (SpeX at IRTF, FLAMINGOS-II at Gemini-South, FIRE at Magellan, OSIRIS at SOAR, SIMON at Observatoire du Mont-Mégantic and at CTIO) to follow-up more than 300 strong candidates. I have as well started a high-resolution NIR follow-up of a few best candidates, using CRIRES at the VLT, in order to measure radial velocity of those stars.
Publications (3)

Proceedings Article | 18 July 2024 Poster + Paper
Lison Malo, Frédérique Baron, Anne-Sophie Poulin-Girard, Philippe Vallée, Jonathan St-Antoine, Denis Brousseau, Hugues Auger, Vladimir Reshetov, François Wildi, Michaël Sordet, Étienne Artigau, René Doyon, Simon Thibault, François Bouchy, Neil Cook, Yolanda Frensch, Gaspare Lo Curto, Gérard Zins, Danuta Sosnowska, Ivan Wevers, Dan Kerley, Guillaume Allain, Romain Allart, Norbert Hubin, Charles Cadieux, Andres Carmona, Zalpha Challita, Nolan Grieves, Olivier Hernandez, Thomas Vandal, Nicolas Blind, Lucile Mignon, Louise Nielsen, Francesco Pepe, Xavier Dumusque, Christophe Lovis, Bruno L. Canto Martins, José Renan de Medeiros, Xavier Delfosse, Nuno Santos, Jonay González-Hernández, Rafael Rebolo, Gregg Wade, Manuel Abreu, Susana Barros, Luc Bazinet, Isabelle Boisse, Xavier Bonfils, Vincent Bourrier, Sébastien Bovay, Christopher Broeg, Vincent Bruniquel, Alexandre Cabral, Yann Carteret, Bruno Chazelas, Ryan Cloutier, João Coelho, Marion Cointepas, Uriel Conod, Nicolas Cowan, Eduardo Cristo, Joao Gomes da Silva, Laurie Dauplaise, Roseane de Lima Gomes, Elisa Delgado-Mena, David Ehrenreich, Joao Faria, Pedro Figueira, Thierry Forveille, Jonathan Gagne, Frederic Genest, Ludovic Genolet, Félix Gracia Témich, Melissa Hobson, Jens Hoeijmakers, Vigneshwaran Krishnamurthy, David Lafreniere, Pierrot Lamontagne, Pierre Larue, Henry Leath, Izan Leão, Olivia Lim, Allan Martins, Claudio Melo, Yuri Messias, Leslie Moranta, Christoph Mordasini, Khaled Al Moulla, Dany Mounzer, Alexandrine L’Heureux, Nicola Nari, Ares Osborn, Lena Parc, Luca Pasquini, Vera Passegger, Stefan Pelletier, Celine Peroux, Caroline Piaulet, Mykhaylo Plotnykov, José Luis Rasilla, Mirsad Sarajlic, Alex Segovia, Julia Seidel, Damien Segransan, Ana Rita Costa Silva, Avidaan Srivastava, Atanas Stefanov, Alejandro Suárez Mascareño, Marcio Teixeira, Stephane Udry, Diana Valencia, Valentina Vaulato, Joost Wardenier, Bachar Wehbé, Drew Weisserman, Benjamin Kung, Anne Boucher, Robin Schnell, Armin Silber, Ivo Saviane, Emanuela Pompei, Peter Sinclaire
Proceedings Volume 13096, 1309646 (2024) https://doi.org/10.1117/12.3020168
KEYWORDS: Vacuum, Spectrographs, Thermal stability, Sensors, Optical components, Lanthanum, Equipment, Cryogenics, Design, Control systems

Proceedings Article | 18 July 2024 Presentation + Paper
Étienne Artigau, François Bouchy, René Doyon, Frédérique Baron, Lison Malo, François Wildi, Franceso Pepe, Neil Cook, Simon Thibault, Vladimir Reshetov, Xavier Dumusque, Christophe Lovis, Danuta Sosnowska, Bruno Canto Martins, Jose Renan De Medeiros, Xavier Delfosse, Nuno Santos, Rafael Rebolo, Manuel Abreu, Guillaume Allain, Romain Allart, Hugues Auger, Susana Barros, Luc Bazinet, Nicolas Blind, Isabelle Boisse, Xavier Bonfils, Vincent Bourrier, Sébastien Bovay, Christopher Broeg, Denis Brousseau, Vincent Bruniquel, Alexandre Cabral, Charles Cadieux, Andres Carmona, Yann Carteret, Zalpha Challita, Bruno Chazelas, Ryan Cloutier, João Coelho, Marion Cointepas, Uriel Conod, Nicolas Cowan, Eduardo Cristo, João Gomes da Silva, Laurie Dauplaise, Roseane Lima Gomes, Elisa Delgado-Mena, David Ehrenreich, João Faria, Pedro Figueira, Thierry Forveille, Yolanda Frensch, Jonathan Gagné, Frédéric Genest, Ludovic Genolet, Jonay González Hernández, Felix Gracia Temich, Nolan Grieves, Olivier Hernandez, Melissa Hobson, Jens Hoeijmakers, Dan Kerley, Vigneshwaran Krishnamurthy, David Lafrenière, Pierrot Lamontagne, Pierre Larue, Henry Leaf, Izan Leão, Olivia Lim, Gaspare Lo Curto, Allan Martins, Claudio Melo, Yuri Messias, Lucile Mignon, Leslie Moranta, Christoph Mordasini, Khaled Al Moulla, Dany Mounzer, Alexandrine L'Heureux, Nicola Nari, Louise Nielsen, Ares Osborn, Lena Parc, Luca Pasquini, Vera Passegger, Stefan Pelletier, Céline Peroux, Caroline Piaulet, Mykhaylo Plotnykov, Anne-Sophie Poulin-Girard, José Luis Rasilla, Jonathan Saint-Antoine, Mirsad Sarajic, Alex Segovia, Julia Seidel, Damien Ségransan, Ana Rita Silva, Avidaan Srivastava, Atanas Stefanov, Alejandro Suárez Mascareño, Michael Sordet, Márcio Teixeira, Sféphane Udry, Diana Valencia, Philippe Vallée, Thomas Vandal, Valentina Vaulato, Gregg Wade, Joost Wardenier, Bachar Wehbé, Drew Weisserman, Ivan Wevers, Gérard Zins
Proceedings Volume 13096, 130960C (2024) https://doi.org/10.1117/12.3018994
KEYWORDS: Planets, Exoplanets, Adaptive optics, Spectrographs, Calibration, Equipment, Telescopes, Infrared astronomy

Proceedings Article | 13 September 2012 Paper
Proceedings Volume 8447, 844760 (2012) https://doi.org/10.1117/12.926247
KEYWORDS: Point spread functions, Speckle pattern, Speckle, Stars, Photometry, Planets, Adaptive optics, Imaging spectroscopy, Gemini Planet Imager, Exoplanets

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