JW
Julien de Wit
astro-ph.EPastro-ph.SRastro-ph.IMastro-ph.HEastro-ph.GAExoplanetsGiant planetsphysics.atom-phphysics.chem-phPlanets
On Valency
published · living versionsW_jbs2xsrs·v1 · currentpublished
Magnetic Activity as a Driver of Low-gravity-like Spectral Morphology in Late-M Dwarfs
with Chia-Lung Lin, Daniel Apai, Benjamin V. Rackham, Prajwal Niraula +5
1 version
W_3wpy4s8w·v1published
Preprints & journals
129 papers in the corpus · 2012–2026TOI-6981 b: a transiting sub-Neptune at the water ice line2609.37597v1 · Madison G. Scott, Amaury H.M.J Triaud, Emily K. Pass et al.2026 · 0 citationsarXiv
Thermophysical characterization of the potentially hazardous near-Earth object 2024 YR42609.15756v1 · T. G. Muller, E. M. MacLennan, A. Y. Burdanov et al.2026 · 0 citationsarXiv
Small-Body Science with the Nautilus Space Observatory: From Cislunar Space Resilience to Mapping the Kuiper-Belt-to-Oort-Cloud Transition2609.10663v1 · J. de Wit, A. Y. Burdanov, P. McGill et al.2026 · 0 citationsarXiv
Leveraging Impact Parameter to Mitigate the Transit Light Source Effect: Early Insights from TRAPPIST-12608.20450v2 · Ana Glidden, Alexander I. Shapiro, Sara Seager et al.2026 · 0 citationsAna Glidden et al 2026 ApJL 1008 L48
Eclipse Timing of the Eccentric Planet HD 80606b with JWST: Constraints on a Second Planet and other Dynamical Effects2608.16816v1 · Charles Beichman, Billy Quarles, B.J. Fulton et al.2026 · 0 citationsarXiv
Size, shape, density, and atmospheric limit of (50000) Quaoar revealed from 14 years of stellar occultation2607.06450v1 · Giuliano Margoti, Felipe Braga-Ribas, Jos'e Luis Ortiz et al.2026 · 0 citationsarXiv
Nautilus Space Observatory: Unveiling the Diversity and Origin of Sub-Neptunes with the Nautilus Space Observatory2607.00268v1 · Luis Welbanks, Kylie E. Hall, Julien de Wit et al.2026 · 0 citationsarXiv
Mapping Stellar Heterogeneities with the Nautilus Space Observatory2606.30706v1 · Adina D. Feinstein, Jeff Valenti, Julien de Wit et al.2026 · 0 citationsarXiv
Nautilus: Fast Time-Resolved Spectroscopy of GKM Stellar Flares and Their Implications for Planetary Habitability2606.26462v1 · Chia-Lung Lin, Adina D. Feinstein, Jeff Valenti et al.2026 · 0 citationsarXiv
J0404+1112: A 3-Hour Eclipsing White Dwarf-Brown Dwarf Probing Multiple Atmospheric Regimes2606.03737v1 · J. de Wit, R. Alonso, B. V. Rackham et al.2026 · 0 citationsarXiv
A Previously Underexplored Regime in TESS: Minute-Scale Eclipses Reveal Ten White Dwarf-Cool M-Dwarf Binaries2606.03850v1 · Tristan Cavalier, Julien de Wit, Mathilde Timmermans et al.2026 · 0 citationsarXiv
JWST Observations of Asteroid 2024 YR4 Rule Out a 2032 Lunar Impact and Demonstrate a New Regime for Planetary Defense Follow-up2605.20498v1 · Julien de Wit, Andrew S. Rivkin, Marco Micheli et al.2026 · 0 citations2026 ApJL 1003 L21
A single power law for the TRAPPIST-1 flare distribution across four orders of magnitude in energy2605.05468v2 · Valeriy Vasilyev, Alexander I. Shapiro, Nadiia Kostogryz et al.2026 · 0 citationsarXiv
A gem system with a lava world and a habitable zone sub-Neptune orbiting TOI-17522604.15816v1 · A. Pel'aez-Torres, F. J. Pozuelos, G. Morello et al.2026 · 1 citationarXiv
Unlocking HST's Stellar Treasure Trove: Stellar Activity Minima for HAT-P-11 Offer Prime Windows for Transmission Spectroscopy2603.24585v2 · Prajwal Niraula, Benjamin V. Rackham, Julien de Wit et al.2026 · 0 citationsarXiv
A Panchromatic JWST Spectrum of a Giant Starspot on the Fully Convective M-dwarf TOI-38842603.15414v2 · C. A. Murray, L. Garcia, B. V. Rackham et al.2026 · 1 citationC. A. Murray et al 2026 ApJL 1003 L45
TOI-4616 b: a benchmark Earth-sized planet transiting a nearby M4 dwarf2603.10905v1 · F. Zong Lang, B. O. Demory, Y. Gomez Maqueo Chew et al.2026 · 0 citationsarXiv
Multi-epoch afterglow rebrightenings in GRB 250129A: Evidence for successive shock interactions2603.08555v1 · D. Akl, S. Antier, H. Koehn et al.2026 · 2 citationsA&A 710, A211 (2026)
Astrometric follow-up of near-Earth asteroid 2024 YR4 during a Torino scale level 3 alert2602.06890v1 · Marco Micheli, Maxime Devogele, Larry Denneau et al.2026 · 4 citationsJ Astronaut Sci 73, 8 (2026)
TOI-7166 b: A Habitable Zone mini-Neptune planet around a nearby low-mass star2512.06841v1 · Khalid Barkaoui, Francisco J. Pozuelos, Benjamin V. Rackham et al.2025 · 2 citationsMonthly Notices of the Royal Astronomical Society, 2025, Volume 544, Issue 2, pp. 2637-2652, 16 pp
Accurate geometric albedo, shape, and size of Hi'iaka from a stellar occultation.41326341 · Fernández-Valenzuela, Estela, Ortiz, Jose Luis, Holler, Bryan J et al.2025 · 5 citationsNature communications. 2025;16(1):10926
MANGOS II: Five new giant planets orbiting low-mass stars2510.11528v1 · G. Dransfield, M. Timmermans, D. Sebastian et al.2025 · 3 citationsarXiv
Comprehensive Ab Initio Quantum Computations of CO-H and CO-He Collisional Properties2510.03327v2 · Prajwal Niraula, Laurent Wiesenfeld, Nejmeddine Jaidane et al.2025 · 1 citationarXiv
What's in Your Transit? Towards Reliably Getting More Science from Exoplanet Transit Data2510.00124v1 · Samson J. Mercier, Julien de Wit, Benjamin V. Rackham2025 · 0 citationsarXiv
Combined Exoplanet Mass and Atmospheric Characterization for Accelerated Exoplanetology2509.25323v1 · Julien de Wit, Sara Seager, Prajwal Niraula2025 · 1 citationarXiv
TOI-1743 b, TOI-5799 b, TOI-5799 c and TOI-6223 b: TESS discovery and validation of four super-Earth to Neptune-sized planets around M dwarfs2509.05038v1 · S. Yalc\inkaya, K. Barkaoui, O. Basturk et al.2025 · 4 citationsA&A 702, A209 (2025)
First JWST thermal phase curves of temperate terrestrial exoplanets reveal no thick atmosphere around TRAPPIST-1 b and c2509.02128v1 · Michael Gillon, Elsa Ducrot, Taylor J. Bell et al.2025 · 4 citationsarXiv
Two warm Earth-sized exoplanets and an Earth-sized candidate in the M5V-M6V binary system TOI-22672508.14176v2 · S. Z'uniga-Fern'andez, F. J. Pozuelos, M. D'evora-Pajares et al.2025 · 11 citationsA&A 702, A85 (2025)
Flares on TRAPPIST-1 reveal the spectrum of magnetic features on its surface2508.04793v1 · Valeriy Vasilyev, Nadiia Kostogryz, Alexander I. Shapiro et al.2025 · 3 citationsarXiv
The effect of stellar magnetic activity on measurements of morning and evening asymmetry of planetary terminator2507.16451v1 · N. Kostogryz, A.I. Shapiro, L. Carone et al.2025 · 2 citationsarXiv
Helium Atmospheres May Hide in Current Exoplanet Analysis Frameworks2506.22537v2 · Julien de Wit, Aaron Householder, Prajwal Niraula2025 · 1 citationApJL 996 L23 2026
Gravity-sensitive Spectral Indices in Ultracool Dwarfs: Investigating Correlations with Metallicity and Planet Occurrence using SpeX and FIRE Observations2506.19928v2 · Fatemeh Davoudi, Benjamin V. Rackham, Julien de Wit et al.2025 · 0 citationsarXiv
Hubble's Multi-Year Search for Exospheres in the TRAPPIST-1 System Reveals Frequent Microflares2506.12140v1 · David Berardo, Julien de Wit, Michael Gillon et al.2025 · 2 citationsarXiv
The Detection-vs-Retrieval Challenge: Titan as an Exoplanet2506.12144v3 · Prajwal Niraula, Julien de Wit, Robert Hargreaves et al.2025 · 5 citationsApJL, 2025
An Eccentric Sub-Neptune Moving Into the Evaporation Desert2505.10324v2 · Sydney Jenkins, Andrew Vanderburg, Ritika Sethi et al.2025 · 2 citationsarXiv
Size and shape of the trans-Neptunian object (470316) 2007 OC10: Comparison with thermal data2504.02457v1 · J.M. G'omez-Lim'on, R. Leiva, J. L. Ortiz et al.2025 · 1 citationA&A 697, A157 (2025)
TOI-6508b: A massive transiting brown dwarf orbiting a low-mass star2502.19940v1 · K. Barkaoui, D. Sebastian, S. Z'uniga-Fern'andez et al.2025 · 0 citationsarXiv
Stellar Models Also Limit Exoplanet Atmosphere Studies in Emission2502.19585v2 · Thomas J. Fauchez, Elsa Ducrot, Benjamin V. Rackham et al.2025 · 13 citationsarXiv
Cryoscope: A Cryogenic Infrared Survey Telescope in Antarctica2502.06950v2 · Mansi M. Kasliwal, Nicholas Earley, Roger Smith et al.2025 · 10 citationsarXiv
TOI-2015b: a sub-Neptune in strong gravitational interaction with an outer non-transiting planet2502.07074v1 · K. Barkaoui, J. Korth, E. Gaidos et al.2025 · 0 citationsarXiv
A transiting giant planet in orbit around a 0.2-solar-mass host star.40687772 · Bryant, Edward M, Jordán, Andrés, Hartman, Joel D et al.2025 · 11 citationsNature astronomy. 2025;9(7):1031-1044
Stellar Contamination Correction Using Back-to-Back Transits of TRAPPIST-1 b and c2412.16541v1 · Alexander D. Rathcke, Lars A. Buchhave, Julien De Wit et al.2024 · 27 citationsarXiv
JWST sighting of decametre main-belt asteroids and view on meteorite sources.39653127 · Burdanov, Artem Y, de Wit, Julien, Brož, Miroslav et al.2025 · 19 citationsNature. 2025;638(8049):74-78
Infrared photometry with InGaAs detectors: First light with SPECULOOS2410.22140v1 · Peter P. Pedersen, Didier Queloz, Lionel Garcia et al.2024 · 8 citationsProceedings Volume 13096, Ground-based and Airborne Instrumentation for Astronomy X; 130963X (2024), Paper 13096-149
Reliable Transmission Spectrum Extraction with a Three-Parameter Limb Darkening Law2410.18617v1 · Rosa E. Keers, Alexander I. Shapiro, Nadiia M. Kostogryz et al.2024 · 7 citationsarXiv
Spectroscopically resolved partial phase curve of the rapid heating and cooling of the highly-eccentric Hot Jupiter HAT-P-2b with WFC32410.11643v1 · Bob Jacobs, Jean-Michel D'esert, Nikole Lewis et al.2024 · 3 citationsarXiv
Ab initio quantum dynamics as a scalable solution to the exoplanet opacity challenge: A case study of CO in hydrogen atmosphere2409.04439v3 · Laurent Wiesenfeld, Prajwal Niraula, Julien de Wit et al.2024 · 10 citationsApJ, March 2025
Detection of an Earth-sized exoplanet orbiting the nearby ultracool dwarf star SPECULOOS-32406.00794v1 · Michael Gillon, Peter P. Pedersen, Benjamin V. Rackham et al.2024 · 16 citationsarXiv
Three short-period Earth-sized planets around M dwarfs discovered by TESS: TOI-5720b, TOI-6008b and TOI-6086b2405.06350v3 · K. Barkaoui, R.P. Schwarz, N. Narita et al.2024 · 0 citationsarXiv
TOI-4336 A b: A temperate sub-Neptune ripe for atmospheric characterization in a nearby triple M-dwarf system2404.12722v1 · M. Timmermans, G. Dransfield, M. Gillon et al.2024 · 8 citationsA&A 687, A48 (2024)
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