Kavli Affiliate: Sara Seager | First 5 Authors: Amélie Gressier, Amélie Gressier, , , | Summary: We present the James Webb Space Telescope (JWST) transmission spectrum of the exoplanet HAT-P-26 b (18.6 Earth masses, 6.33 Earth radii), based on a single transit observed with the JWST NIRSpec G395H grating. We detect water vapor (ln B […]
Kavli Affiliate: Andrew M. Vanderburg | First 5 Authors: Anne Dattilo, Anne Dattilo, , , | Summary: Young planets with mass measurements are particularly valuable in studying atmospheric mass-loss processes, but these planets are rare and their masses difficult to measure due to stellar activity. We report the discovery of a planetary system around TOI-6109, […]
Kavli Affiliate: Jacqueline Hewitt | First 5 Authors: Vincent MacKay, Vincent MacKay, , , | Summary: We introduce the Radio-array $uv$ Layout Engineering Strategy (RULES), an algorithm for designing radio arrays that achieve complete coverage of the $uv$ plane, defined as, at minimum, regular sampling at half the observing wavelength ($lambda$) along the $u$ and […]
Kavli Affiliate: Erin Kara | First 5 Authors: , , , , | Summary: Accretion discs in strong gravity ubiquitously produce winds, seen as blueshifted absorption lines in the X-ray band of both stellar mass X-ray binaries (black holes and neutron stars), and supermassive black holes. Some of the most powerful winds (termed Eddington winds) […]
Kavli Affiliate: Melania Nynka | First 5 Authors: Shifra Mandel, Shifra Mandel, , , | Summary: For the first time in nearly a decade, a new, bright transient was detected in the central parsec (pc) of the Galaxy. MAXI J1744-294 was never observed in outburst prior to January 2025. We present the results of a […]
Kavli Affiliate: Anna Frebel | First 5 Authors: Jennifer Mead, Jennifer Mead, , , | Summary: Stellar surface abundances are records of the state of the gas from which stars formed, and thus trace how individual elements have mixed into the surrounding medium following their ejection from stars. In this work, we test the common […]
Kavli Affiliate: Eric Miller | First 5 Authors: Xi Long, Xi Long, , , | Summary: We present results from the Chandra X-ray Observatory Large Project (878 ks in 28 observations) of the Large Magellanic Cloud supernova remnant N132D. We measure the expansion of the forward shock in the bright southern rim to be $0.!^primeprime10 […]
Kavli Affiliate: Sara Seager | First 5 Authors: Sukrit Ranjan, Sukrit Ranjan, , , | Summary: The James Webb Space Telescope (JWST) has begun to spectrally characterize small exoplanets orbiting M-dwarf stars, but interpretation of these spectra is ambiguous, with stellar, instrumental, or atmospheric origins possible for apparent spectral features. Consequently, interpretation of JWST small […]
Kavli Affiliate: Salvatore Vitale | First 5 Authors: Jack Heinzel, Jack Heinzel, , , | Summary: The coming years of gravitational wave astrophysics promises thousands of new detections, which can unlock fundamental scientific insights if the information in each observation can be properly synthesized into a coherent picture. State-of-the-art approaches often accomplish this with hierarchical […]
Kavli Affiliate: Kiyoshi W. Masui | First 5 Authors: Adam E. Lanman, Adam E. Lanman, , , | Summary: Fast radio bursts (FRBs) provide a sensitive probe of diffuse baryons: their dispersion measures (DMs) measure electron density independent of temperature and scale linearly with gas density. This makes them particularly well suited to studying the […]