Kavli Affiliate: D. B. Macfarlane | First 5 Authors: SuperCDMS Collaboration, SuperCDMS Collaboration, , , | Summary: Cryogenic calorimeters for low-mass dark matter searches have achieved sub-eV energy resolutions, driving advances in both low-energy calibration techniques and our understanding of detector physics. The energy deposition spectrum of gamma rays scattering off target materials exhibits step-like […]

Kavli Affiliate: Nicola Omodei | First 5 Authors: Rahul Gupta, Rahul Gupta, , , | Summary: We present a comprehensive multiwavelength analysis of GRB 240825A, a bright gamma-ray burst (GRB) detected by Fermi and Swift, with a prompt duration ($T_rm 90$ ~ 4 sec in 50-300 keV) near the boundary separating short and long GRBs, […]

Kavli Affiliate: Susan E. Clark | First 5 Authors: Yiqi Liu, Yiqi Liu, , , | Summary: We investigate how dust foreground complexity can affect measurements of the tensor-to-scalar ratio, $r$, in the context of the Simons Observatory, using a cross-spectrum component separation analysis. Employing a suite of simulations with realistic Galactic dust emission, we […]

Kavli Affiliate: Chao-Lin Kuo | First 5 Authors: A. R. Khalife, A. R. Khalife, , , | Summary: We present the most up-to-date constraints on axion early dark energy (AEDE) from cosmic microwave background (CMB) and baryon acoustic oscillation (BAO) measurements. In particular, we assess the impact of data from ground-based CMB experiments, the South […]

Kavli Affiliate: Aaron Roodman | First 5 Authors: Riley Clarke, Riley Clarke, , , | Summary: We present the first derivation of a stellar flare temperature profile from single-band photometry. Stellar flare DWF030225.574-545707.45129 was detected in 2015 by the Dark Energy Camera as part of the Deeper, Wider, Faster Programme. The brightness ($Delta m_g = […]

Kavli Affiliate: Bruce Macintosh | First 5 Authors: , , , , | Summary: Young exoplanets provide a critical link between understanding planet formation and atmospheric evolution. Direct imaging spectroscopy allows us to infer the properties of young, wide orbit, giant planets with high signal-to-noise. This allows us to compare this young population to exoplanets […]

Kavli Affiliate: Steven W. Allen | First 5 Authors: Zhefu Yu, Zhefu Yu, , , | Summary: X-ray reverberation, which exploits the time delays between variability in different energy bands as a function of Fourier frequency, probes the structure of the inner accretion disks and X-ray coronae of active galactic nuclei. We present a systematic […]

Kavli Affiliate: Sven Herrmann | First 5 Authors: Piotr Maj, Piotr Maj, , , | Summary: We present a Virtual Frisch-Grid geometry-based CZT gamma detector developed for identifying different radioisotopes over an energy range from single keV up to 2 MeV, and useful for efficient characterization of CZT crystals. The detector is built with a […]

Kavli Affiliate: Risa H. Wechsler | First 5 Authors: Jenny T. Wan, Jenny T. Wan, , , | Summary: The advent of JWST has revolutionized the study of faint satellite galaxies at $z gtrsim 1$, enabling statistical constraints on galaxy evolution and the galaxy$-$halo connection in a previously unexplored mass and redshift regime. We compare […]

Kavli Affiliate: Steven M. Kahn | First 5 Authors: Colin Orion Chandler, Colin Orion Chandler, , , | Summary: We report on the observation and measurement of astrometry, photometry, morphology, and activity of the interstellar object 3I/ATLAS, also designated C/2025 N1 (ATLAS), with the NSF-DOE Vera C. Rubin Observatory. The third interstellar object, comet 3I/ATLAS, […]