NC
Nicolas Cowan
astro-ph.EPastro-ph.IMastro-ph.SRastro-phphysics.geo-phphysics.ao-phastro-ph.COastro-ph.GAastro-ph.HEmicrobiology
On Valency
published · living versionsW_cq26se5x·v1 · currentpublished
Detection of Solar-like Oscillations and Granulation at Infrared Wavelengths using JWST
with Angharad Weeks, Daniel Huber, Timothy R. Bedding, Jared Splinter +6
1 version
Preprints & journals
221 papers in the corpus · 2007–2026SPIRou near-infrared spectropolarimetry of the ultra-hot Jupiter KELT-9b: tentative detection of the planet magnetic field2610.05951v1 · Alexis Lavail, Florian Debras, David Rog'e Royo et al.2026 · 0 citationsarXiv
A temperate sub-Neptune transiting the M4 Dwarf TOI-210 identified by NIRPS and TESS -- Uncovering hidden M-dwarf planetary systems in the near-infrared2609.35747v1 · C. Cadieux, B. N. Skinner, F. Bouchy et al.2026 · 0 citationsarXiv
Cool, Cloudy Nights on an Ultrahot Neptune: A Panchromatic NIRISS/NIRSpec Transmission Spectrum of LTT 9779 b2609.36206v1 · Sarah Stamer, Diana Dragomir, Annabella Meech et al.2026 · 0 citationsarXiv
The First Hubble Detection of a Secondary Eclipse from a Rocky Exoplanet: the 5.4-hour planet TOI-2431 b2609.31966v1 · Sebastian Zieba, Billy Edwards, Samuel N. Quinn et al.2026 · 0 citationsarXiv
Upside down: GJ3090 b the first retrograde exoplanet around an M dwarf detected with NIRPS2609.24870v1 · Y. Carteret, V. Bourrier, L. Parc et al.2026 · 0 citationsA&A, Volume 713, September 2026, L15
Thermal Evolution of Lava Planets Across System Ages: Predictions for Hell of a Survey2609.20155v2 · Mariana Sastre, Tim Lichtenberg, Lisa Dang et al.2026 · 0 citationsarXiv
POSTELLAR: Posterior Stellar Spectrum Sampling - An Alternative to Approximate Stellar Spectra for Exoplanetary Analysis2609.05599v1 · Dhvani Doshi, Nicolas B. Cowan, Yashar Hezaveh et al.2026 · 0 citationsarXiv
Night-sky emission correction techniques for high-resolution spectroscopy: Demonstration with NIRPS2609.03374v1 · Avidaan Srivastava, Francois Bouchy, Xavier Dumusque et al.2026 · 0 citationsarXiv
Radial velocity detection of the TRAPPIST-1 planetary system with SPIRou and NIRPS2609.03006v1 · Alexandrine L'Heureux, Ren'e Doyon, Charles Cadieux et al.2026 · 0 citationsarXiv
Beyond Five Scale Heights: Composition- and Cloud-dependent Ariel Tier-2 Requirements for sub-Neptunes2609.01577v1 · Vigneshwaran Krishnamurthy, Nicolas B. Cowan, Misato Fukagawa et al.2026 · 0 citationsarXiv
Atmospheric Reconnaissance of TRAPPIST-1 f with JWST NIRISS SOSS: No Evidence for the Transit Light Source Effect2608.17207v2 · Olivia Lim, Ren'e Doyon, Ryan J. MacDonald et al.2026 · 0 citationsarXiv
Early Exploration of the Scientific Discovery Space for the Habitable Worlds Observatory2608.11294v1 · Courtney D. Dressing, Danica Adams, Evelyne Alecian et al.2026 · 0 citationsarXiv
A Pair of Warm Saturn-mass Planets near the 2:1 Mean Motion Resonance around TOI-38502608.11328v1 · Sean Collins, Michelle Kunimoto, Nicolas B. Cowan et al.2026 · 0 citationsarXiv
The JWST weather report: Unravelling the atmospheric variability of isolated worlds using principal component analysis2607.26182v1 · Merle A. Schrader, Johanna M. Vos, Evert Nasedkin et al.2026 · 0 citationsarXiv
The breaking of cold traps and onset of titanium in ultra-hot Jupiter atmospheres: WASP-189b in context2606.15934v1 · Stefan Pelletier, Romain Allart, Valentina Vaulato et al.2026 · 0 citationsA&A, 711, A119 (2026)
HERMES: HiERarchical Modelling for Exoplanet Science2606.02696v1 · Wasi M. F. Naqvi, Nicolas B. Cowan2026 · 0 citationsarXiv
Assessing Ariel's capabilities to observe free-floating brown dwarfs2605.28924v1 · Roman Akhmetshyn, Nicolas B Cowan, Sarah Casewell2026 · 0 citationsarXiv
Towards Doppler eclipse mapping of hot Jupiters. An observational perspective on WASP-33 b with SPIRou2605.22931v1 · Vincent Yariv, Xavier Bonfils, Nicolas Cowan et al.2026 · 0 citationsarXiv
Unraveling the Mystery of the Peculiar and Young Hot Jupiter CoRoT-2b. I. HO and CO Detection from Dayside Observations with Gemini-S/IGRINS2605.20340v1 · Ying Shu, Lisa Dang, Antoine Darveau-Bernier et al.2026 · 1 citationYing Shu et al 2026 AJ 171 333
The Days Drag On on WASP-121 b: Interpreting its NIRISS Spectroscopic Phase Curve with General Circulation Models2605.01589v1 · Robert C. Frazier, Emily Rauscher, Jared Splinter et al.2026 · 1 citationarXiv
Coupled orbital and interior structure evolution of lava planets2604.18682v1 · Mahesh Herath, Nicolas B. Cowan, Charles-'Edouard Boukar'e et al.2026 · 1 citationarXiv
Super-Earth masses and stellar abundances from NIRPS reveal tentative evidence for water-rich formation around M dwarfs2604.07447v1 · Drew Weisserman, Nicole Gromek, Ryan Cloutier et al.2026 · 4 citationsA&A 709, A165 (2026)
On the Information Content of Ariel Transmission Spectra: Reassessing the Tier System2604.07598v2 · Michael Radica, Nicolas B. Cowan, Ryan Cloutier et al.2026 · 0 citationsarXiv
Searching for Molecular Signatures in 14 Transiting Exoplanets with SPIRou2603.17574v2 · A. Masson, S. Vinatier, B. B'ezard et al.2026 · 0 citationsarXiv
TOI-4552 b: A new ultra-short period rocky world revealed by NIRPS and TESS2603.18233v1 · Avidaan Srivastava, Ren'e Doyon, Francois Bouchy et al.2026 · 1 citationA&A 709, A73 (2026)
Confirmation of the hot super-Neptune TOI-672 b with NIRPS and HARPS and Insights into the Neptunian desert around M dwarfs2603.12345v1 · Ares Osborn, Ryan Cloutier, Vincent Bourrier et al.2026 · 1 citationA&A 709, A23 (2026)
Balancing Variety and Sample Size: Optimal Parameter Sampling for Ariel Target Selection2601.21020v2 · Emilie Panek, Alexander Roman, Katia Matcheva et al.2026 · 0 citationsarXiv
NIRPS tightens the mass estimate of GJ 3090 b and detects a planet near the stellar rotation period2601.09330v2 · Pierrot Lamontagne, Drew Weisserman, Charles Cadieux et al.2026 · 1 citationA&A, 706 (2026) A278
Diversity in the haziness and chemistry of temperate sub-Neptunes2512.10876v1 · Pierre-Alexis Roy, Bjorn Benneke, Marylou Fournier-Tondreau et al.2025 · 9 citationsarXiv
A complex structure of escaping helium spanning more than half the orbit of the ultra-hot Jupiter WASP-121 b.41361179 · Allart, Romain, Coulombe, Louis-Philippe, Carteret, Yann et al.2025 · 7 citationsNature communications. 2025;16(1):10822
The Albedo Problem and Cloud Cover on Hot Jupiters2511.18497v2 · Kevin Heng, Billy Edwards, Nicolas B. Cowan2025 · 1 citationarXiv
Rock vapour is opaque: implications for dynamics and observations of lava planets2511.11800v1 · T. Giang Nguyen, Nicolas B. Cowan, Gunnar Montseny Gens et al.2025 · 0 citationsarXiv
NIRPS and TESS reveal a peculiar system around the M dwarf TOI-756: A transiting sub-Neptune and a cold eccentric giant2510.14927v1 · L'ena Parc, Francois Bouchy, Neil J. Cook et al.2025 · 5 citationsA&A, 702, A138 (2025)
TOI-3288 b and TOI-4666 b: two gas giants transiting low-mass stars characterised by NIRPS2510.11703v2 · Yolanda G. C. Frensch, Francois Bouchy, Gaspare Lo Curto et al.2025 · 5 citationsarXiv
Heat Reveals What Clouds Conceal: Global Carbon & Longitudinally Asymmetric Chemistry on LTT 9779 b2510.04863v1 · Reza Ashtari, Sean Collins, Jared Splinter et al.2025 · 0 citationsarXiv
Mapping the Cloud-Driven Atmospheric Dynamics & Chemistry of an Isolated Exoplanet Analog with Harmonic Signatures2510.02260v4 · Michael K. Plummer, Francis P. Cocchini, Peter A. Kearns et al.2025 · 0 citationsarXiv
Microbial exoenzymes catalyzed the transition to an oxygenated Earth10.1101/2025.09.11.675588v1 · Sanger, A., Steen, A. D., Boden, J. S. et al.2025 · 0 citationsbioRxiv
Precise Constraints on the Energy Budget of WASP-121 b from its JWST NIRISS/SOSS Phase Curve2509.09760v2 · Jared Splinter, Louis-Philippe Coulombe, Robert C. Frazier et al.2025 · 13 citationsThe Astronomical Journal 170 (2025) 323
On the synergetic use of Ariel and JWST for exoplanet atmospheric science2509.02657v2 · Quentin Changeat, Pierre-Olivier Lagage, Giovanna Tinetti et al.2025 · 0 citationsarXiv
Mapping atmospheric features of the planetary-mass brown dwarf SIMP 0136 with JWST NIRISS2509.00149v2 · Roman Akhmetshyn, Etienne Artigau, Nicolas B. Cowan et al.2025 · 4 citationsApJ, 993, 237 (2025)
Atmospheric composition and circulation of the ultra-hot Jupiter WASP-121b with joint NIRPS, HARPS and CRIRES+ transit spectroscopy2509.00151v1 · Valentina Vaulato, Melissa J. Hobson, Romain Allart et al.2025 · 3 citationsarXiv
Enriched volatiles and refractories but deficient titanium on the dayside atmosphere of WASP-121b revealed by JWST/NIRISS2508.18341v2 · Stefan Pelletier, Louis-Philippe Coulombe, Jared Splinter et al.2025 · 10 citationsarXiv
The Interpolation Constraint in the RV Analysis of M-Dwarfs Using Empirical Templates2508.10980v2 · Dhvani Doshi, Nicolas B. Cowan, 'Etienne Artigau et al.2025 · 3 citationsarXiv
Strict limits on potential secondary atmospheres on the temperate rocky exo-Earth TRAPPIST-1 d2508.08416v1 · Caroline Piaulet-Ghorayeb, Bjorn Benneke, Martin Turbet et al.2025 · 22 citationsarXiv
Quantifying thermal water dissociation in the dayside photosphere of WASP-121 b using NIRPS2508.06626v1 · Luc Bazinet, Romain Allart, Bjorn Benneke et al.2025 · 4 citationsA&A 701, A276 (2025)
Diving into the planetary system of Proxima with NIRPS -- Breaking the metre per second barrier in the infrared2507.21751v1 · Alejandro Su'arez Mascareno, 'Etienne Artigau, Lucile Mignon et al.2025 · 12 citations2025, A&A, 700, A11
NIRPS joining HARPS at ESO 3.6 m. On-sky performance and science objectives2507.21767v1 · Francois Bouchy, Rene Doyon, Francesco Pepe et al.2025 · 30 citationsA&A, 700, A10 (2025)
Hydride ion continuum hides absorption signatures in the NIRPS near-infrared transmission spectrum of the ultra-hot gas giant WASP-189b2507.21229v1 · Valentina Vaulato, Stefan Pelletier, David Ehrenreich et al.2025 · 9 citationsarXiv
Blind search for activity-sensitive lines in the near-infrared using HARPS and NIRPS observations of Proxima and Gl 5812507.21262v1 · Joao Gomes da Silva, Elisa Delgado-Mena, Nuno C. Santos et al.2025 · 4 citationsarXiv
NIRPS detection of delayed atmospheric escape from the warm and misaligned Saturn-mass exoplanet WASP-69b2507.21284v1 · Romain Allart, Yann Carteret, Vincent Bourrier et al.2025 · 7 citationsarXiv
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