Vivien Parmentier: Publications

Lessons from Hubble and Spitzer: 1D Self-consistent Model Grids for 19 Hot Jupiter Emission Spectra

The Astrophysical Journal American Astronomical Society 971:1 (2024) 33

Authors:

Lindsey S Wiser, Michael R Line, Luis Welbanks, Megan Mansfield, Vivien Parmentier, Jacob L Bean, Jonathan J Fortney

Identifying and fitting eclipse maps of exoplanets with cross-validation

Monthly Notices of the Royal Astronomical Society 91̽�� University Press (OUP) 532:4 (2024) 4350-4368

Authors:

Mark Hammond, Neil T Lewis, Sasha Boone, Xueqing Chen, João M Mendonça, Vivien Parmentier, Jake Taylor, Taylor Bell, Leonardo dos Santos, Nicolas Crouzet, Laura Kreidberg, Michael Radica, Michael Zhang

Design and testing of a low-resolution NIR spectrograph for the Exoplanet Climate Infrared Telescope

Proceedings of SPIE--the International Society for Optical Engineering SPIE, the international society for optics and photonics 13096 (2024) 13096a5-13096a5-13

Authors:

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

Integration and testing of a cryogenic receiver for the Exoplanet Climate Infrared Telescope (EXCITE)

Proceedings of SPIE--the International Society for Optical Engineering SPIE, the international society for optics and photonics 13096 (2024) 130963p-130963p-10

Authors:

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

A benchmark JWST near-infrared spectrum for the exoplanet WASP-39 b

Nature Astronomy Nature Research 8:8 (2024) 1008-1019

Authors:

AL Carter, EM May, N Espinoza, L Welbanks, E Ahrer, L Alderson, R Brahm, AD Feinstein, D Grant, M Line, G Morello, R O’Steen, M Radica, Z Rustamkulov, KB Stevenson, JD Turner, MK Alam, DR Anderson, NM Batalha, MP Battley, D Bayliss, JL Bean, B Benneke, ZK Berta-Thompson

Abstract:

Observing exoplanets through transmission spectroscopy supplies detailed information about their atmospheric composition, physics and chemistry. Before the James Webb Space Telescope (JWST), these observations were limited to a narrow wavelength range across the near-ultraviolet to near-infrared, alongside broadband photometry at longer wavelengths. To understand more complex properties of exoplanet atmospheres, improved wavelength coverage and resolution are necessary to robustly quantify the influence of a broader range of absorbing molecular species. Here we present a combined analysis of JWST transmission spectroscopy across four different instrumental modes spanning 0.5–5.2 μm using Early Release Science observations of the Saturn-mass exoplanet WASP-39 b. Our uniform analysis constrains the orbital and stellar parameters within subpercentage precision, including matching the precision obtained by the most precise asteroseismology measurements of stellar density to date, and it further confirms the presence of Na, K, H2O, CO, CO2 and SO2 as atmospheric absorbers. Through this process, we have improved the agreement between the transmission spectra of all modes, except for the NIRSpec PRISM, which is affected by partial saturation of the detector. This work provides strong evidence that uniform light curve analysis is an important aspect to ensuring reliability when comparing the high-precision transmission spectra provided by JWST.

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