Vivien Parmentier: Publications

Evidence for morning-to-evening limb asymmetry on the cool low-density exoplanet WASP-107 b

Nature Astronomy Springer Science and Business Media LLC 8:12 (2024) 1562-1574

Authors:

Matthew M Murphy, Thomas G Beatty, Everett Schlawin, Taylor J Bell, Michael R Line, Thomas P Greene, Vivien Parmentier, Emily Rauscher, Luis Welbanks, Jonathan J Fortney, Marcia Rieke

Multiple Clues for Dayside Aerosols and Temperature Gradients in WASP-69 b from a Panchromatic JWST Emission Spectrum

The Astronomical Journal American Astronomical Society 168:3 (2024) 104

Authors:

Everett Schlawin, Sagnick Mukherjee, Kazumasa Ohno, Taylor J Bell, Thomas G Beatty, Thomas P Greene, Michael Line, Ryan C Challener, Vivien Parmentier, Jonathan J Fortney, Emily Rauscher, Lindsey Wiser, Luis Welbanks, Matthew Murphy, Isaac Edelman, Natasha Batalha, Sarah E Moran, Nishil Mehta, Marcia Rieke

Inhomogeneous terminators on the exoplanet WASP-39 b

Nature Springer Nature 632:8027 (2024) 1017-1020

Authors:

Néstor Espinoza, Maria E Steinrueck, James Kirk, Ryan J MacDonald, Arjun B Savel, Kenneth Arnold, Eliza M-R Kempton, Matthew M Murphy, Ludmila Carone, Maria Zamyatina, David A Lewis, Dominic Samra, Sven Kiefer, Emily Rauscher, Duncan Christie, Nathan Mayne, Christiane Helling, Zafar Rustamkulov, Vivien Parmentier, Erin M May, Aarynn L Carter, Xi Zhang, Mercedes López-Morales, Natalie Allen, Jasmina Blecic, Leen Decin, Luigi Mancini, Karan Molaverdikhani, Benjamin V Rackham, Enric Palle, Shang-Min Tsai, Eva-Maria Ahrer, Jacob L Bean, Ian JM Crossfield, David Haegele, Eric Hébrard, Laura Kreidberg, Diana Powell, Aaron D Schneider, Luis Welbanks, Peter Wheatley, Rafael Brahm, Nicolas Crouzet

The Exoplanet Climate Infrared Telescope (EXCITE): gondola pointing and stabilization qualification

Proceedings of SPIE--the International Society for Optical Engineering SPIE, the international society for optics and photonics 13094 (2024) 130944y-130944y-9

Authors:

Javier L Romualdez, Lee Bernard, Andrea Bocchieri, Nathaniel Butler, Quentin Changeat, Azzurra D'Alessandro, Billy Edwards, Johnathan Gamaunt, Qian Gong, John Hartley, Kyle R Helson, Logan Jensen, Daniel P Kelly, Kanchita Klangboonkrong, Annalies Kleyheeg, Ed Leong, Nikole Lewis, Steven Li, Michael Line, Stephen Maher, Ryan McClelland, Laddawan R Miko, Lorenzo V Mugnai, Peter C Nagler, C Barth Netterfield, Vivien Parmentier, Enzo Pascale, Jennifer Patience, Tim Rehm, Subhajit Sarkar, Paul Scowen, Gregory Tucker, Augustyn Waczynski, Ingo Waldmann

Phase-resolving the Absorption Signatures of Water and Carbon Monoxide in the Atmosphere of the Ultra-hot Jupiter WASP-121b with GEMINI-S/IGRINS

Publications of the Astronomical Society of the Pacific Astronomical Society of the Pacific 136:8 (2024) 084403

Authors:

Joost P Wardenier, Vivien Parmentier, Michael R Line, Megan Weiner Mansfield, Xianyu Tan, Shang-Min Tsai, Jacob L Bean, Jayne L Birkby, Matteo Brogi, Jean-Michel Désert, Siddharth Gandhi, Elspeth KH Lee, Colette I Levens, Lorenzo Pino, Peter CB Smith

Abstract:

Ultra-hot Jupiters (UHJs) are among the best targets for atmospheric characterization at high spectral resolution. Resolving their transmission spectra as a function of orbital phase offers a unique window into the 3D nature of these objects. In this work, we present three transits of the UHJ WASP-121b observed with Gemini-S/IGRINS. For the first time, we measure the phase-dependent absorption signals of CO and H2O in the atmosphere of an exoplanet, and we find that they are different. While the blueshift of CO increases during the transit, the absorption lines of H2O become less blueshifted with phase, and even show a redshift in the second half of the transit. These measurements reveal the distinct spatial distributions of both molecules across the atmospheres of UHJs. Also, we find that the H2O signal is absent in the first quarter of the transit, potentially hinting at cloud formation on the evening terminator of WASP-121b. To further interpret the absorption trails of CO and H2O, as well as the Doppler shifts of Fe previously measured with VLT/ESPRESSO, we compare the data to simulated transits of WASP-121b. To this end, we post-process the outputs of the global circulation models with a 3D Monte-Carlo radiative transfer code. Our analysis shows that the atmosphere of WASP-121b is subject to atmospheric drag, as previously suggested by small hotspot offsets inferred from phase-curve observations. Our study highlights the importance of phase-resolved spectroscopy in unravelling the complex atmospheric structure of UHJs and sets the stage for further investigations into their chemistry and dynamics.

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