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.

Models suggest that collisions between continents that drive tectonic uplift cannot be the only source of weatherable minerals if an Earth-like planet without life is to have a stable climate.

New and archival Hubble observations show that the components of NGC 3603-A1 have masses of 93 and 70 solar masses, and these two enormous stars orbit one another every 3.8 days.