12 papers

astro-ph.SR2026

Non-ideal MHD and protostellar feedback effects on disc formation and evolution in numerical simulations of star cluster formation

Nina Filippova, Stella S. R. Offner, Michael Y. Grudic +1

While recent surveys have resolved hundreds of nearby protostellar discs, numerical simulations assuming ideal magnetohydrodynamics (MHD) have historically struggled to achieve dis…

astro-ph.IM2026

Early Exploration of the Scientific Discovery Space for the Habitable Worlds Observatory

Courtney D. Dressing, Danica Adams, Evelyne Alecian +324

The paper summarizes 70 science cases for the proposed NASA Habitable Worlds Observatory, outlining the observational needs across four scientific pillars and detailing required ca…

math.NA2026

A Proof of the Forsythe Conjecture for the Two-Step Restarted Conjugate Gradient Method

Matthew J. Colbrook, George Stepaniants, Alex Townsend

Forsythe conjectured in 1968 that the normalized residual directions of restarted conjugate gradients approach a two-cycle. We prove the conjecture for restart length two: unless t…

astro-ph.GA2026

XRISM Resolves the Circum-nuclear Environment of NGC 4945

Peter G. Boorman, Poshak Gandhi, Yoshihiro Ueda +31

Compton-thick Active Galactic Nuclei (AGN) represent one of the most elusive phases of massive black hole growth, yet are expected to contribute substantially to the Cosmic X-ray B…

astro-ph.IM2026

Design and Performance of 220 and 270 GHz Bandpass Filters for BICEP Array

A. Steiger, The BICEP/Keck Collaboration, P. A. R. Ade +90

The BICEP Array (BA) is the latest in the BICEP/ Keck series of experiments that aim to measure the polarization of the cosmic microwave background (CMB) with small aperture polari…

astro-ph.EP2026

Neptune's Inner Moons and Rings Are Exposed Icy Body Interiors

M. Ryleigh Davis, Matthew Belyakov, Ian Wong +2

JWST spectroscopy of Neptune's inner moons (Larissa, Galatea, Proteus) and its rings shows no water ice but a distinctive 2.72 µm magnesium‑rich phyllosilicate band, indicating the…