JK
J. Kirk
astro-ph.EPastro-ph.SRastro-ph.IMRadiotherapy DosageModels, BiologicalRadiation EffectsCell DifferentiationErythropoiesisHematopoiesisRadiotherapy
On Valency
published · living versionsW_ynufkxb8·v1 · currentpublished
An Earth-sized exoplanet with a Mercury-like composition
with A. Santerne, B. Brugger, D. J. Armstrong, V. Adibekyan +41
1 version
Preprints & journals
109 papers in the corpus · 1968–2026The asymmetric limbs of HD 209458 b observed with JWST NIRCam F322W2/F444W2609.16834v1 · Cathal Maguire, Eva-Maria Ahrer, Charlotte Fairman et al.2026 · 0 citationsarXiv
BOWIE-ALIGN: Exploring degeneracies in the muted transmission spectrum of the aligned hot Jupiter NGTS-2b with NIRSpec/G395H2603.18332v1 · Charlotte Fairman, Hannah R. Wakeford, Alastair B. Claringbold et al.2026 · 0 citationsarXiv
JWST COMPASS: NIRSpec/G395H Transmission Observations of the Sub-Neptune HD 15337 c2602.22327v1 · Nicole L. Wallack, Peter Gao, Michael Greklek-McKeon et al.2026 · 7 citationsarXiv
JWST COMPASS: A NIRSpec G395H Transmission Spectrum of Radius Valley-Dweller TOI-260 b2602.22329v1 · Annabella Meech, Peter Gao, Nicole L. Wallack et al.2026 · 3 citationsarXiv
LRG-BEASTS: Detection of sodium and evidence for water absorption in the hot Saturn HAT-P-44b2602.19986v1 · Alastair B. Claringbold, Peter J. Wheatley, James Kirk et al.2026 · 0 citationsarXiv
Using observations of escaping H/He to constrain the atmospheric composition of sub-Neptunes2601.14254v2 · James G. Rogers, James E. Owen, Ethan Schreyer et al.2026 · 0 citationsMon Not R Astron Soc (2026)
BOWIE-ALIGN: Sub-solar C/O ratio and metallicity atmosphere of the misaligned hot Jupiter HAT-P-30b2601.13104v1 · Alastair B. Claringbold, Chloe E. Fisher, James Kirk et al.2026 · 0 citationsarXiv
Resolving the flat-spectrum conundrum: clumpy aerosol distributions in sub-Neptune atmospheres2511.19013v1 · James E. Owen, James Kirk2025 · 2 citationsarXiv
JWST COMPASS: Insights into the Systematic Noise Properties of NIRSpec/G395H From a Uniform Reanalysis of Seven Transmission Spectra2511.18196v2 · Tyler A. Gordon, Natalie M. Batalha, Natasha E. Batalha et al.2025 · 6 citationsarXiv
Stacking transmission spectra of different exoplanets2510.27386v2 · James Kirk, James E. Owen2025 · 1 citationMon Not R Astron Soc (2026)
Testing the performance of cross-correlation techniques to search for molecular features in JWST NIRSpec G395H observations of transiting exoplanets2509.25319v1 · Emma Esparza-Borges, Mercedes L'opez-Morales, Enric Pall'e et al.2025 · 2 citationsarXiv
Limb Asymmetries on WASP-39b: A Multi-GCM Comparison of Chemistry, Clouds, and Hazes2509.21588v2 · Maria E. Steinrueck, Arjun B. Savel, Duncan A. Christie et al.2025 · 1 citationarXiv
Mapping the SO2 Shoreline in Gas Giant Exoplanets2509.14318v2 · Ian J. M. Crossfield, Eva-Maria Ahrer, Jonathan Brande et al.2025 · 7 citationsarXiv
BOWIE-ALIGN: Weak spectral features in KELT-7b's JWST NIRSpec/G395H transmission spectrum imply a high cloud deck or a low-metallicity atmosphere2509.12479v1 · Eva-Maria Ahrer, Charlotte Fairman, James Kirk et al.2025 · 4 citationsarXiv
Additional JWST/NIRSpec Transits of the Rocky M Dwarf Exoplanet GJ 1132 b Reveal a Featureless Spectrum2508.10579v1 · Katherine A. Bennett, Ryan J. MacDonald, Sarah Peacock et al.2025 · 13 citationsarXiv
Searching for helium escape and a low density atmosphere around the 120 Myr old sub-Neptune HIP94235b using CRIRES+2506.04605v1 · Ava Morrissey, George Zhou, Chelsea X. Huang et al.2025 · 1 citationarXiv
On Linking Planet Formation Models, Protoplanetary Disk Properties, and Mature Gas Giant Exoplanet Atmospheres2506.00669v1 · Adina D. Feinstein, Richard A. Booth, Jennifer B. Bergner et al.2025 · 1 citationarXiv
Tracing the formation and migration history: molecular signatures in the atmosphere of misaligned hot Jupiter WASP-94Ab using JWST NIRSpec/G395H2505.11224v2 · Eva-Maria Ahrer, Siddharth Gandhi, Lili Alderson et al.2025 · 13 citationsarXiv
BOWIE-ALIGN: Sub-stellar metallicity and carbon depletion in the aligned TrES-4b with JWST NIRSpec transmission spectroscopy2503.24280v1 · Annabella Meech, Alastair B. Claringbold, Eva-Maria Ahrer et al.2025 · 11 citationsarXiv
JWST COMPASS: NIRSpec/G395H Transmission Observations of TOI-776 c, a 2 Rearth M Dwarf Planet2502.20501v1 · Johanna Teske, Natasha E. Batalha, Nicole L. Wallack et al.2025 · 1 citationarXiv
The Magnetically Induced Radial Velocity Variation of Gliese 341 and an Upper Limit to the Mass of Its Transiting Earth-sized Planet2502.07867v1 · Victoria DiTomasso, Mercedes Lopez-Morales, Sarah Peacock et al.2025 · 3 citationsThe Astrophysical Journal, Volume 979, Issue 2, id.214, 18 pp. February 2025
JWST COMPASS: NIRSpec/G395H Transmission Observations of the Super-Earth TOI-776b2501.14596v1 · Lili Alderson, Sarah E. Moran, Nicole L. Wallack et al.2025 · 22 citationsarXiv
Tracing the Winds: A Uniform Interpretation of Helium Escape in Exoplanets from Archival Spectroscopic Observations2501.03998v2 · Patrick McCreery, Leonardo A. Dos Santos, N'estor Espinoza et al.2025 · 12 citationsarXiv
JWST COMPASS: The first near- to mid-infrared transmission spectrum of the hot super-Earth L 168-9 b2411.03154v1 · Munazza K. Alam, Peter Gao, Jea Adams Redai et al.2024 · 29 citationsarXiv
BOWIE-ALIGN: JWST reveals hints of planetesimal accretion and complex sulphur chemistry in the atmosphere of the misaligned hot Jupiter WASP-15b2410.08116v2 · James Kirk, Eva-Maria Ahrer, Alastair B. Claringbold et al.2024 · 25 citationsarXiv
JWST COMPASS: The 3-5 Micron Transmission Spectrum of the Super-Earth L 98-59 c2409.07552v1 · Nicholas Scarsdale, Nicholas Wogan, Hannah R. Wakeford et al.2024 · 1 citationarXiv
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
Inhomogeneous terminators on the exoplanet WASP-39 b.39009005 · Espinoza, Néstor, Steinrueck, Maria E, Kirk, James et al.2024 · 48 citationsNature. 2024;632(8027):1017-1020
BOWIE-ALIGN: A JWST comparative survey of aligned vs misaligned hot Jupiters to test the dependence of atmospheric composition on migration history2407.03198v2 · James Kirk, Eva-Maria Ahrer, Anna B.T. Penzlin et al.2024 · 18 citationsarXiv
BOWIE-ALIGN: How formation and migration histories of giant planets impact atmospheric compositions2407.03199v3 · Anna B.T. Penzlin, Richard A. Booth, James Kirk et al.2024 · 35 citationsarXiv
Debris Disks can Contaminate Mid-Infrared Exoplanet Spectra: Evidence for a Circumstellar Debris Disk around Exoplanet Host WASP-392406.02305v1 · Laura Flagg, Alycia J. Weinberger, Taylor J. Bell et al.2024 · 3 citationsarXiv
Non-Detections of Helium in the Young Sub-Jovian Planets K2-100b, HD 63433b, & V1298 Tau c2405.17294v2 · Munazza K. Alam, James Kirk, Leonardo A. Dos Santos et al.2024 · 0 citationsarXiv
JWST COMPASS: A NIRSpec/G395H Transmission Spectrum of the Sub-Neptune TOI-836c2404.01264v1 · Nicole L. Wallack, Natasha E. Batalha, Lili Alderson et al.2024 · 68 citationsarXiv
JWST COMPASS: NIRSpec/G395H Transmission Observations of the Super-Earth TOI-836b2404.00093v1 · Lili Alderson, Natasha E. Batalha, Hannah R. Wakeford et al.2024 · 49 citationsarXiv
Using JWST transits and occultations to determine stellar radii and temperatures of low-mass stars2402.05991v2 · Alexandra S. Mahajan, Jason D. Eastman, James Kirk2024 · 25 citations2024ApJ...963L..37M
Sulfur dioxide in the mid-infrared transmission spectrum of WASP-39b.38232945 · Powell, Diana, Feinstein, Adina D, Lee, Elspeth K H et al.2024 · 100 citationsNature. 2024;626(8001):979-983
JWST/NIRCam Transmission Spectroscopy of the Nearby Sub-Earth GJ 341b2401.06043v1 · James Kirk, Kevin B. Stevenson, Guangwei Fu et al.2024 · 48 citationsarXiv
Double Trouble: Two Transits of the Super-Earth GJ 1132 b Observed with JWST NIRSpec G395H2310.10711v1 · E. M. May, Ryan J. MacDonald, Katherine A. Bennett et al.2023 · 106 citationsApJL (2023): 959, L9
Detection of Carbon Monoxide in the Atmosphere of WASP-39b Applying Standard Cross-Correlation Techniques to JWST NIRSpec G395H Data2309.00036v1 · Emma Esparza-Borges, Mercedes L'opez-Morales, J'ea I. Adams Redai et al.2023 · 39 citationsarXiv
ACCESS, LRG-BEASTS, & MOPSS: Featureless Optical Transmission Spectra of WASP-25b and WASP-124b2308.06263v2 · Chima D. McGruder, Mercedes L'opez-Morales, James Kirk et al.2023 · 0 citationsarXiv
High Tide or Riptide on the Cosmic Shoreline? A Water-Rich Atmosphere or Stellar Contamination for the Warm Super-Earth GJ~486b from JWST Observations2305.00868v2 · Sarah E. Moran, Kevin B. Stevenson, David K. Sing et al.2023 · 183 citationsarXiv
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
Detection of carbon monoxide's 4.6 micron fundamental band structure in WASP-39b's atmosphere with JWST NIRSpec G395H2304.11994v1 · David Grant, Joshua D. Lothringer, Hannah R. Wakeford et al.2023 · 26 citationsarXiv
Stability and detectability of exomoons orbiting HIP 41378 f, a temperate Jovian planet with an anomalously low apparent density2303.14294v2 · Caleb K. Harada, Courtney D. Dressing, Munazza K. Alam et al.2023 · 14 citationsarXiv
LRG-BEASTS: Evidence for clouds in the transmission spectrum of HATS-46 b2303.07381v1 · E. Ahrer, P. J. Wheatley, S. Gandhi et al.2023 · 8 citationsarXiv
A JWST transmission spectrum of a nearby Earth-sized exoplanet2301.04191v1 · J. Lustig-Yaeger, G. Fu, E. M. May et al.2023 · 141 citationsarXiv
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
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