activity
20242026
most citedNew Evidence for a Flux-independent Spectral Index of Sgr A* in the Near-infrared

6 citations · 6 across the 4 of their papers we have counts for

collaborators

6 papers

astro-ph.IM2026

Probabilistic Interpolation of Sagittarius A*'s Multi-Wavelength Light Curves Using Diffusion Models

Gabriel Sasseville, Julie Hlavacek-Larrondo, Daryl Haggard +3

Understanding the variability of Sagittarius A* (Sgr A*) requires coordinated, multi-wavelength observations that span the electromagnetic spectrum. In this work, we focus on data…

astro-ph.CO2025

JWST Lensed Quasar Dark Matter Survey III: Dark Matter Sensitive Flux Ratios and Warm Dark Matter Constraint from the Full Sample

R. E. Keeley, A. M. Nierenberg, D. Gilman +24

We present the full sample of measurements of the warm dust emission of 31 strongly-lensed, multiply imaged quasars, observed with JWST MIRI multiband imaging, which we use to cons…

astro-ph.CO2025

Macromodel-free flux-ratio prediction in quadruply imaged quasars with local constraints from lensed arcs

Hadrien Paugnat, Tommaso Treu, Daniel Gilman

Strong gravitational lensing is a powerful cosmological probe, providing a direct tool to unveil the properties of dark matter (DM) on sub-galactic scales. In particular, flux-rati…

astro-ph.HE2025

FRB 20250316A: A Brilliant and Nearby One-Off Fast Radio Burst Localized to 13 parsec Precision

FRB Collaboration, Thomas C. Abbott, Daniel Amouyal +83

Precise localizations of a small number of repeating fast radio bursts (FRBs) using very long baseline interferometry (VLBI) have enabled multiwavelength follow-up observations rev…

astro-ph.CO2025

Elliptical multipoles for gravitational lenses

Hadrien Paugnat, Daniel Gilman

Gravitational lensing galaxies are commonly modeled with elliptical density profiles, to which angular complexity is sometimes added through a multipole expansion - encoding deform…

astro-ph.HE20246 cited

New Evidence for a Flux-independent Spectral Index of Sgr A* in the Near-infrared

Hadrien Paugnat, Tuan Do, Abhimat K. Gautam +11

In this work, we measure the spectral index of Sagittarius A* (Sgr A*) between the (1.6 m) and (2.2 m) broadband filters in the near-infrared (NIR), sampling o…