Researchers have found evidence that the 244 EeV Amaterasu event could have originated from the nearby blazar PKS 1717+177, provided that there is a strong extragalactic magnetic field.

The presence of hills around lakes on Titan decreases the rate of methane evaporation from the lakes and creates a thicker marine layer — a cold, stable layer of methane that forms above and around a lake.

Researchers find evidence that the polarized and pulsed emission from the pulsar PSR J1023+0038 are both due to synchrotron radiation arising from where the pulsar wind interacts with the accretion disk.

Long-term monitoring of the Vela pulsar finds a large Gaussian structure and a compact radial disk, both of which may be due to the pulsar’s wind; a supernova remnant could also be a possible source of the disk.

Using precise astrometry from Hipparcos and Gaia, researchers derived masses and orbits for 111 stellar, 12 brown dwarf, and 33 planetary companions around main-sequence stars.

Simulated black-hole disks with accretion rates between 0.03 and 4 times the Eddington rate are capable of reproducing the spectra seen from real disks, yielding insights into the physical structures of these disks.