MM
Megan Mansfield
astro-ph.EPastro-ph.IMastro-ph.SRExoplanetsphysics.geo-phastro-ph.GAAtmospheric chemistryAtmospheric dynamicsphysics.pop-phPlanets and satellites: atmospheres
On Valency
published · living versionsW_x4ej2wk4·v1 · currentpublished
The Pandora SmallSat: Target Selection and Early Science
with Emily A. Gilbert, Elisa V. Quintana, Jessie L. Dotson, Knicole D. Colón +39
1 version
Preprints & journals
69 papers in the corpus · 2018–2026The Pandora SmallSat: Target Selection and Early Science2610.30028v1 · Emily A. Gilbert, Elisa V. Quintana, Jessie L. Dotson et al.2026 · 0 citationsarXivon Valency
The Pandora SmallSat: post-launch operations and mission update2610.30372v1 · Trevor O. Foote, Elisa V. Quintana, Jessie L. Dotson et al.2026 · 0 citationsarXiv
Inhomogeneous Cloud Coverage and Altitude-Dependent Heat Transport on the Hot-Jupiter NGTS-10 Ab from its Optical-to-Infrared Phase Curve2609.16115v1 · Louis-Philippe Coulombe, Vivien Parmentier, Kevin B. Stevenson et al.2026 · 0 citationsarXiv
JWST MIRI reveals a potential atmosphere on the ultra-hot rocky planet TOI-431b2609.03029v1 · Cole Smith, Brandon Park Coy, Megan Weiner Mansfield et al.2026 · 0 citationsarXiv
An Evolving Cosmic Shoreline and Sandbar Bounding the Rocky Airless Valley2608.23912v1 · Barron K. Nguyen, Laura K. Schaefer, Xuan Ji et al.2026 · 0 citationsAstrophys. J. Lett. 1008 (2026) L4
No Helium Detected in LHS 1140 b from Four JWST NIRISS/SOSS Transits2608.13473v1 · Katherine A. Bennett, Carlos Gasc'on, Jacob Lustig-Yaeger et al.2026 · 0 citationsarXiv
The Roasting Marshmallows Program with IGRINS on Gemini South V: Atmosphere of MASCARA-1b is Enriched in Refractory Elements2606.07497v1 · Krishna Kanumalla, Michael R. Line, Martina Chiarella et al.2026 · 1 citationarXiv
Horizontal transport as a source of disequilibrium chemistry on the nightside of a hot exoplanet2605.04936v1 · Vivien Parmentier, Kevin B. Stevenson, Luis Welbanks et al.2026 · 3 citationsNat Astron (2026)
Evidence for an Atmosphere on the Ultra-Short Period super-Earth HD 3167 b2604.11911v2 · Brandon Park Coy, Qiao Xue, Megan Weiner Mansfield et al.2026 · 4 citationsarXiv
NASA's Pandora SmallSat Mission: Simulated Modeling and Retrieval of Near-Infrared Exoplanet Transmission Spectra2603.04488v1 · Yoav Rotman, Peter McGill, Luis Welbanks et al.2026 · 3 citationsarXiv
NASA's Pandora SmallSat Mission: Simulating the Impact of Stellar Photospheric Heterogeneity and Its Correction2603.04519v2 · Benjamin V. Rackham, Aishwarya R. Iyer, D'aniel Apai et al.2026 · 2 citationsarXiv
A Stellar magnesium to silicon ratio in the atmosphere of an exoplanet.41708629 · Sanchez, Jorge A, Smith, Peter C B, Kanumalla, Krishna et al.2026 · 5 citationsNature communications. 2026;17(1)
Do Rocky Planets around M Stars Have Atmospheres? A Statistical Approach to the Cosmic Shoreline2508.08253v1 · Jegug Ih, Eliza M.-R. Kempton, Hannah Diamond-Lowe et al.2025 · 1 citationarXiv
The Roasting Marshmallows Program with IGRINS on Gemini South III: Seeing deeper into the metal depleted atmosphere of a gas-giant on the cusp of the hot to ultra-hot Jupiter transition2507.07204v1 · Vatsal Panwar, Matteo Brogi, Krishna Kanumalla et al.2025 · 1 citationarXiv
An Analysis of Spitzer Phase Curves for WASP-121b and WASP-77Ab2503.12521v1 · Brian Davenport, Thomas Kennedy, E.M. May et al.2025 · 5 citationsarXiv
Horizontal and vertical exoplanet thermal structure from a JWST spectroscopic eclipse map.41415969 · Challener, Ryan C, Weiner Mansfield, Megan, Cubillos, Patricio E et al.2025 · 6 citationsNature astronomy. 2025;9(12):1821-1832
Population-level Hypothesis Testing with Rocky Planet Emission Data: A Tentative Trend in the Brightness Temperatures of M-Earths2412.06573v3 · Brandon Park Coy, Jegug Ih, Edwin S. Kite et al.2024 · 16 citationsApJ 987 22 (2025)
A dark, bare rock for TOI-1685 b from a JWST NIRSpec G395H phase curve2412.03411v1 · Rafael Luque, Brandon Park Coy, Qiao Xue et al.2024 · 19 citationsarXiv
A Global Perspective with Updated Constraints on the Ultra-hot Jupiter WASP-19b: Atmospheric Properties and Stellar Activity2412.03739v1 · Abigail A. Tumborang, Jessica J. Spake, Heather A. Knutson et al.2024 · 2 citationsThe Astronomical Journal, 168:296 (14pp), 2024 December
Time Resolved Absorption of Six Chemical Species With MAROON-X Points to Strong Drag in the Ultra Hot Jupiter TOI-1518 b2412.01472v4 · A. Simonnin, V. Parmentier, J.P. Wardenier et al.2024 · 18 citationsA&A 698, A314 (2025)
A Measurement of the Water Abundance in the Atmosphere of the Hot Jupiter WASP-43b with High-resolution Cross-correlation Spectroscopy2411.17923v1 · Dare Bartelt, Megan Weiner Mansfield, Michael R. Line et al.2024 · 1 citationarXiv
The Roasting Marshmallows Program with IGRINS on Gemini South II -- WASP-121 b has super-stellar C/O and refractory-to-volatile ratios2410.19017v1 · Peter C. B. Smith, Jorge A. Sanchez, Michael R. Line et al.2024 · 32 citationsarXiv
No Thick Atmosphere on the Terrestrial Exoplanet Gl 486b2408.15123v2 · Megan Weiner Mansfield, Qiao Xue, Michael Zhang et al.2024 · 47 citationsarXiv
A Comprehensive Analysis Spitzer 4.5 m Phase Curve of Hot Jupiters2408.13308v1 · Lisa Dang, Taylor J. Bell, Ying (Zoe) Shu et al.2024 · 0 citationsarXiv
JWST Thermal Emission of the Terrestrial Exoplanet GJ 1132b2408.13340v1 · Qiao Xue, Jacob L. Bean, Michael Zhang et al.2024 · 53 citationsarXiv
Geodynamics of super-Earth GJ 486b2408.10851v2 · Tobias G. Meier, Dan J. Bower, Tim Lichtenberg et al.2024 · 5 citationsJGR: Planets 2024, 129, e2024JE008491
Lessons from Hubble and Spitzer: 1D Self-Consistent Model Grids for 19 Hot Jupiter Emission Spectra2408.06442v1 · Lindsey S. Wiser, Michael R. Line, Luis Welbanks et al.2024 · 5 citationsApJ 971 33 (2024)
A Benchmark JWST Near-Infrared Spectrum for the Exoplanet WASP-39b2407.13893v1 · A. L. Carter, E. M. May, N. Espinoza et al.2024 · 65 citationsarXiv
IGRINS observations of WASP-127 b: HO, CO, and super-Solar atmospheric metallicity in the inflated sub-Saturn2406.14072v1 · Krishna Kanumalla, Michael R. Line, Megan Weiner Mansfield et al.2024 · 11 citationsThe Astronomical Journal, 168:201 (13pp), 2024 November
Phase-resolving the absorption signatures of water and carbon monoxide in the atmosphere of the ultra-hot Jupiter WASP-121b with GEMINI-S/IGRINS2406.09641v3 · Joost P. Wardenier, Vivien Parmentier, Michael R. Line et al.2024 · 30 citationsarXiv
Enhancing Exoplanet Ephemerides by Leveraging Professional and Citizen Science Data: A Test Case with WASP-77A b2405.19615v2 · Federico R. Noguer, Suber Corley, Kyle A. Pearson et al.2024 · 0 citationsarXiv
The metallicity and carbon-to-oxygen ratio of the ultra-hot Jupiter WASP-76b from Gemini-S/IGRINS2405.09769v2 · Megan Weiner Mansfield, Michael R. Line, Joost P. Wardenier et al.2024 · 23 citationsarXiv
Two-Dimensional Eclipse Mapping of the Hot Jupiter WASP-43b with JWST MIRI/LRS2404.16488v1 · Mark Hammond, Taylor J. Bell, Ryan C. Challener et al.2024 · 19 citationsarXiv
Nightside clouds and disequilibrium chemistry on the hot Jupiter WASP-43b.39049827 · Bell, Taylor J, Crouzet, Nicolas, Cubillos, Patricio E et al.2026 · 78 citationsNature astronomy. 2024;8(7):879-898
A Combined Ground-based and JWST Atmospheric Retrieval Analysis: Both IGRINS and NIRSpec Agree The Atmosphere of WASP-77A b is Metal-Poor2312.13069v1 · Peter Smith, Michael Line, Jacob Bean et al.2023 · 0 citationsarXiv
A Non-Detection of Iron in the First High-Resolution Emission Study of the Lava Planet 55 Cnc e2308.10378v3 · Kaitlin C. Rasmussen, Miles H. Currie, Celeste Hagee et al.2023 · 12 citationsarXiv
A broadband thermal emission spectrum of the ultra-hot Jupiter WASP-18b.37257843 · Coulombe, Louis-Philippe, Benneke, Björn, Challener, Ryan et al.2023 · 148 citationsNature. 2023;620(7973):292-298
A reflective, metal-rich atmosphere for GJ 1214b from its JWST phase curve.37164036 · Kempton, Eliza M-R, Zhang, Michael, Bean, Jacob L et al.2023 · 171 citationsNature. 2023;620(7972):67-71
Photochemically produced SO2 in the atmosphere of WASP-39b.37100917 · Tsai, Shang-Min, Lee, Elspeth K H, Powell, Diana et al.2023 · 269 citationsNature. 2023;617(7961):483-487
Planet Eclipse Mapping with Long-Term Baseline Drifts2304.06851v1 · Everett Schlawin, Ryan Challener, Megan Mansfield et al.2023 · 4 citationsarXiv
Elemental Abundances of the Super-Neptune WASP-107b's Host Star Using High-resolution, Near-infrared Spectroscopy2304.03808v1 · Neda Hejazi, Ian Crossfield, Thomas Nordlander et al.2023 · 21 citationsarXiv
High atmospheric metal enrichment for a Saturn-mass planet.36972686 · Bean, Jacob L, Xue, Qiao, August, Prune C et al.2023 · 57 citationsNature. 2023;618(7963):43-46
Early Release Science of the exoplanet WASP-39b with JWST NIRSpec PRISM.36623548 · Rustamkulov, Z, Sing, D K, Mukherjee, S et al.2023 · 328 citationsNature. 2023;614(7949):659-663
Early Release Science of the exoplanet WASP-39b with JWST NIRSpec G395H.36623549 · Alderson, Lili, Wakeford, Hannah R, Alam, Munazza K et al.2023 · 277 citationsNature. 2023;614(7949):664-669
Early Release Science of the exoplanet WASP-39b with JWST NIRISS.36623550 · Feinstein, Adina D, Radica, Michael, Welbanks, Luis et al.2023 · 235 citationsNature. 2023;614(7949):670-675
Early Release Science of the exoplanet WASP-39b with JWST NIRCam.36623551 · Ahrer, Eva-Maria, Stevenson, Kevin B, Mansfield, Megan et al.2023 · 200 citationsNature. 2023;614(7949):653-658
Revealing the atmospheres of highly irradiated exoplanets: from ultra-hot Jupiters to rocky worlds.37006965 · Mansfield, Megan2023 · 6 citationsAstrophysics and space science. 2023;368(3):24
A strong H- opacity signal in the near-infrared emission spectrum of the ultra-hot Jupiter KELT-9b2211.10297v1 · Bob Jacobs, Jean-Michel D'esert, Lorenzo Pino et al.2022 · 15 citationsA&A 668, L1 (2022)
The Roasting Marshmallows Program with IGRINS on Gemini South I: Composition and Climate of the Ultra Hot Jupiter WASP-18 b2209.15548v1 · Matteo Brogi, Vanessa Emeka-Okafor, Michael R. Line et al.2022 · 80 citationsarXiv
Identification of carbon dioxide in an exoplanet atmosphere2208.11692v1 · The JWST Transiting Exoplanet Community Early Release Science Team: Eva-Maria Ahrer, Lili Alderson, Natalie M. Batalha et al.2022 · 197 citationsarXiv
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