Peer-reviewed astrophysics journal publishing rapid, short papers on new or significant astronomical findings, companion to The Astrophysical Journal.
TU Braunschweig and University of Tokyo researchers report the first demonstration of reversed magnetic-field rotation in solar-wind turbulence. The flip sits where the plasma changes from fluid-like to particle-like behavior, according to the team.
Reality
Caltech and Michigan theorists find a dying Sun shedding mass in 4,600 random kicks unravels the giant planets' orbits within 10 billion years in 90% of runs. It is a simulation result built on kick sizes inferred from Gaia binaries, and the reported figures do not cleanly support the hundredfold speed-up over the old estimate.
Reality
Indian Institute of Science simulations let a magnetized white dwarf reach about 2.4 solar masses, well above the 1.4 Chandrasekhar limit. The model traces one route a star could take, and how many of the Type Ia supernovae used to measure cosmic distances start that way is still open.
Reality
University of Chicago researchers report Webb evidence of an atmosphere on HD 3167 b, a rocky planet with a 24-hour orbit. Planets that close to a star are expected to lose gas to stellar wind and high-energy light, so the result could help explain how rocky worlds keep their atmospheres.
Reality
Elias 2-24 b sits in a disk gap 55 times Earth's distance from its star, where formation models ask for at least five million years to build a Jupiter. Keck coronagraph images from 2018 and 2020 put it under a million years old.
Perspective Coverage
5 publishersReality
ASU-led astronomers stacked hundreds of jet galaxies and found hydrogen glowing along the jets for hundreds of thousands of light-years. The glow fits one explanation for why gas-rich galaxies stop making stars, though what was measured is ionized gas, not star formation.
Reality
UC San Diego physicists compared eight Planck polarization maps against each other and recovered the same 0.37-degree twist as the standard analysis. The agreement gives cosmologists a second way to ask whether the rotation is in the sky or in the instrument, though the authors stress it does not confirm the twist is real.
Reality
ASU and RRI astronomers found hydrogen glow concentrated along black hole jets after stacking the spectra of hundreds of galaxies. It places jet energy in the halo gas that feeds new stars, though any drop in star formation is still inferred.
Reality
Simulations strand Earth outside the heliosphere three times in 14 million years, and dust in sediment cores agrees. The cadence, roughly one encounter every 4.5 million years, limits what it explains.
Reality
University of Chicago astronomers report that HD 3167 b, a super-Earth with a one-day orbit, has a dayside cooler than bare rock should allow. That makes it the coolest atmosphere case so far for a ten-planet program looking for the temperature at which lava worlds start to keep their atmospheres.
Reality
UC San Diego physicists cross-checked eight Planck polarization maps and found their relative calibration matches the standard analysis. The test cancels any rotation all detectors share, so the hinted 0.37-degree twist still needs an absolute angle reference.
Reality
Physicists at HKU and Beijing Normal University derived lensing predictions straight from a three-dimensional wave simulation. On one well-studied quasar, the image positions came out closer to the data than the models they compared against.
Reality
Yale-led work in The Astrophysical Journal Letters ran the ASTRID simulation without fixing black holes to galactic centres. Mergers left them off-centre for billions of years, most often in the smallest galaxies.
Reality
A RIKEN group simulated water ice chemistry at 10 kelvin and found that a single property of a metal-poor birth cloud can produce both of the strange isotope ratios measured in interstellar comet 3I/ATLAS.
Reality
An August paper in The Astrophysical Journal Letters brings a 100- and a 130-solar-mass black hole back inside theory by assuming a foreground lens of 190 to 850 solar masses, in a lensing regime nobody has yet detected.
Reality
Redshifts of double quasars can be wrong about depth by as much as 10 million light-years, because the black hole's own outflows spoil the velocity. Huanqing Chen's team tested reading the separation from lit-up gas.
Reality
Two years after the same team stopped at three to four Jupiter masses in this cloud, deeper Webb imaging and spectroscopy reached 0.19 percent of a solar mass, below where models of cloud collapse sit comfortably.
Perspective Coverage
3 publishersReality
For the first time, the Earth-Theia collision has been simulated with temperature-dependent rock strength. Some runs still make the familiar debris disk; the hottest assemble an intact Moon in about five hours.
Reality
PSR J1637-4642 spent about nine years of its archival record doing nothing unusual, then jumped its spin rate by 2.7 parts per million in 2018 and twice more since. That says something about baselines as well as neutron stars.
Reality
Fit as a magnified and diffracted signal, GW231123's 190 to 265 solar masses drop to 100 to 180, which matters less for that one event than for every heavy merger in the catalogue nobody has lens-checked.
Reality