Kavli Affiliate: Erin Kara | First 5 Authors: Collin Lewin, Collin Lewin, , , | Summary: In the past decade, Swift has performed several AGN high-cadence reverberation mapping campaigns, and generally found that the UV/optical interband lags are $sim$3 times longer than predicted for a standard thin disk, thus coined "the accretion disk size problem". […]
Kavli Affiliate: Max Tegmark | First 5 Authors: Sergiu Bursuc, Sergiu Bursuc, , , | Summary: We present and test the largest benchmark for vericoding, LLM-generation of formally verified code from formal specifications – in contrast to vibe coding, which generates potentially buggy code from a natural language description. Our benchmark contains 12,504 formal specifications, […]
Kavli Affiliate: Erin Kara | First 5 Authors: Eliza Neights, Eliza Neights, , , | Summary: Gamma-ray bursts are the most luminous electromagnetic events in the universe. Their prompt gamma-ray emission has typical durations between a fraction of a second and several minutes. A rare subset of these events have durations in excess of a […]
Kavli Affiliate: Dheeraj Pasham | First 5 Authors: Brendan O’Connor, Brendan O’Connor, , , | Summary: GRB 250702B is an exceptional transient that produced multiple episodes of luminous gamma-ray radiation lasting for $>25$ ks, placing it among the class of ultra-long gamma-ray bursts (GRBs). However, unlike any known GRB, the textitEinstein Probe detected soft X-ray […]
Kavli Affiliate: Dheeraj Pasham | First 5 Authors: Brendan O’Connor, Brendan O’Connor, , , | Summary: GRB 250702B is an exceptional transient that produced multiple episodes of luminous gamma-ray radiation lasting for $>25$ ks, placing it among the class of ultra-long gamma-ray bursts (GRBs). However, unlike any known GRB, the textitEinstein Probe detected soft X-ray […]
Kavli Affiliate: Dheeraj Pasham | First 5 Authors: Jonathan Carney, Jonathan Carney, , , | Summary: GRB 250702B was the longest gamma-ray burst ever observed, with a duration that challenges standard collapsar models and suggests an exotic progenitor. We collected a rich set of optical and infrared follow-up observations of its rapidly fading afterglow using […]
Kavli Affiliate: Kiyoshi W. Masui | First 5 Authors: Calvin Leung, Calvin Leung, , , | Summary: Baryonic feedback is a leading contaminant in studying dark matter and cosmology using cosmic shear. This has meant omitting much of the data during cosmological inference, or forward-modeling the spatial distribution of gas around dark matter halos using […]
Kavli Affiliate: Mark Vogelsberger | First 5 Authors: Xuejian Shen, Xuejian Shen, , , | Summary: Early JWST observations have revealed a high-redshift universe more vibrant than predicted by canonical galaxy-formation models within $Lambda$CDM, showing an excess of ultraviolet(UV)-bright, massive, and morphologically mature galaxies. Departures from $Lambda$CDM prior to recombination can imprint signatures on non-linear […]
Kavli Affiliate: Lina Necib | First 5 Authors: Isabel S. Sands, Isabel S. Sands, , , | Summary: The Milky Way’s galactic center is a highly dynamical, crowded environment. Gamma ray observations of this region, such as the excess of GeV scale gamma rays observed by Fermi LAT, have been of tremendous interest to both […]
Kavli Affiliate: Mark Vogelsberger | First 5 Authors: Desika Narayanan, Desika Narayanan, , , | Summary: A combination of JWST observations at z~12-14 and ALMA observations of extremely dust-rich systems at z~6 has demonstrated that dust grows extremely fast in the early Universe, with galaxies amassing up to 10^7 Msun of dust in just 500 […]