Itai Sfaradi et al 2026 ApJL 1005 L19
Recent radio rebrightening of a supernova observed in 2012 suggests that either the progenitor star experienced a past change in mass-loss rate or wind speed, or there is an off-axis relativistic jet present.
Ádám Mátéfy et al 2026 ApJ 1004 142
Gaia21bja is a young stellar object that brightens by up to 1.7 magnitudes during its outbursts, with its luminosity and mass-accretion rate increasing by a factor of 5.5–6 during the bursts.
Yunshi Zeng et al 2026 ApJS 284 63
Using more than 50,000 images of coronal mass ejections, researchers have developed a novel machine-learning classification framework applicable to coronal mass ejections.
Sandeep Kumar et al 2026 ApJ 1006 26
By combining ground-based and space-based solar observations, researchers found that solar minimum solar wind predictions require higher source-surface heights than solar maximum predictions.
Yejing Zhan et al 2026 ApJL 1004 L46
The combination of gravitational wave emission, magnetic dissipation, and tidal interactions should cause the beat clock period of the CHIME/ILT J1634+44 system to change by tens of seconds per year.
The Hayabusa2 spacecraft could be rerouted to collide with asteroid 2024 YR4 and impart a velocity change of a few centimeters per second (though thankfully, such an intervention is not necessary!).