Science

Study finds eight ultramassive (>10 billion M⊙) black holes in brightest cluster galaxies

Accepted ApJ paper reports eight new direct detections of ultramassive black holes (>10 billion M⊙) in brightest cluster galaxies; core size may predict mass better than velocity dispersion.

#astronomy, #blackholes, #galaxies, #astrophysics

First recorded olive ridley sea-turtle nests found on U.S. West Coast; about 200 eggs moved to Long Beach

Two olive ridley turtles nested on Orange County beaches in mid-September — the first recorded West Coast nesting; about 200 eggs were moved to Long Beach.

#seaturtle, #wildlife, #california, #climate

Candidate tidal disruption event spotted in quasar 700 million years after Big Bang

Astronomers report a candidate tidal disruption event in GNz7q, a dusty quasar at z=7.19, reconstructed from Hubble, Spitzer and JWST — a rare early‑universe glimpse.

#tidaldisruption, #blackhole, #quasar, #jwst, #astrophysics

Study identifies backup pathway that lets cells make cysteine without major disulfide reductases

Researchers report a PLP-dependent cystine C–S bond cleavage in mouse livers that supplies cysteine even when main disulfide reductases are absent.

#cellbiology, #cysteine, #metabolism, #cancer

Preprint: Reinforcement learning yields improvements to 15 longstanding kissing-number and spherical-code bounds

Peking University preprint says reinforcement-learning system PackingStar improves 15 kissing-number and spherical-code lower bounds; some cases have exact certificates.

#mathematics, #ai, #reinforcement-learning, #kissing-numbers

Petrillo and Glimm Define a Precise Target for Unforced 3D Navier‑Stokes Blowup Searches

A new arXiv preprint formalizes the 'positive defect' target and admissibility criteria to guide computer-assisted searches for unforced 3D Navier‑Stokes blowup.

#navierstokes, #mathematics, #fluiddynamics, #formalverification

ArXiv preprint claims possible 0.38‑parsec binary supermassive black holes in NGC 5044

An arXiv preprint reports two radio-bright cores 0.38 pc apart in NGC 5044, a possible record sub-parsec binary SMBH — the claim is unreviewed and provisional.

#blackholes, #ngc5044, #radioastronomy, #astrophysics

Gaia astrometry suggests hidden fifth companion in HR 8799 system

Gaia and archival data point to a possible 10–14 Jupiter-mass object 2–3 au from HR 8799, filling a long-standing inner detection gap.

#exoplanets, #gaia, #hr8799, #astronomy

Simulation Study Maps How NIF-Style Indirect Drive Could Reach High Target Gains

An arXiv modeling paper from LLNL and Inertia outlines indirect-drive targets that simulations say could yield 265–427 MJ from a hypothetical 10 MJ laser.

#fusion, #livermore, #nif, #simulation, #inertia

Reanalysis with Corrected Pantheon+ and DES-DOVEKIE Leaves Hubble Tension Intact

A reanalysis applying corrected Pantheon+ and DES-DOVEKIE supernova data finds the local Hubble constant stays near 73 km/s/Mpc, leaving the Hubble tension unchanged.

#hubbletension, #cosmology, #supernovae, #pantheonplus, #des

Preprint claims first direct auroral radio detection and magnetic-field measurement for exoplanet β Pictoris b

Unreviewed arXiv preprint reports MeerKAT detections of auroral radio bursts from β Pictoris b and infers a ≳1.25 kG magnetic field; confirmation needed.

#exoplanets, #astronomy, #radioastronomy, #magneticfields

Multi-agent AI 'Station' publishes code and Lean proofs after claiming novel mathematical discoveries

An arXiv preprint says the open‑world multi‑agent system Station claimed several new mathematical results and published code, full dialogues and Lean proofs.

#ai, #math, #research, #formalproofs

Preprint: Strong helium outflow detected on sub‑Neptune GJ 3090b could strip its gas in ~300 million years

An arXiv preprint reports a strong metastable-helium signal from sub‑Neptune GJ 3090b, implying rapid photoevaporative loss that could strip its H‑He envelope in ~300 million years.

#exoplanets, #astronomy, #helium, #photoevaporation

BEAST: Exascale Bayesian Weather Transformer Trained on JUPITER Reaches 3.96 Exaflops

A multi‑institution team trained BEAST, a Bayesian weather transformer, on JUPITER at 3.96 exaflops, producing 0.25° probabilistic forecasts; arXiv preprint.

#weather, #ai, #supercomputing, #forecasting, #exascale

Preprint reports Kohn‑Sham DFT at 100–200 million atoms and an 11.3M-atom battery interface

An arXiv preprint describes an O(N) Kohn‑Sham DFT method the authors say scaled to 100–200M atoms and matched XPS on an 11.3M-atom battery interface.

#dft, #materials-science, #computational-physics, #batteries