Yongyun Chen et al 2023 ApJS 268 6

Observations of more than 1,000 blazars — active galactic nuclei with jets pointed almost directly toward Earth — provide a way to investigate how these jets are launched.

Pooneh Nazari et al 2023 ApJL 951 L38

Increased temperatures around protostars may result in the enhancement of oxygen-poor molecules like acetonitrile compared to oxygen-rich molecules like methanol.

Mariko Kimura et al 2023 ApJ 951 124

A cataclysmic variable system might be a precursor to a black widow pulsar system; if the system’s white dwarf accretes enough material, it will become a neutron star that feeds off its low-mass stellar companion.

Matthias Y. He and Lauren M. Weiss 2023 AJ 166 36

Planetary systems with giant outer planets may exhibit more irregular spacing between the inner planets compared to systems without giant planets, giving a new way to identify systems containing unseen giant planets.

M. Ryleigh Davis et al 2023 Planet. Sci. J. 4 148

An absorption feature seen in the spectrum of Jupiter’s moon Europa continues to defy understanding, although researchers have placed a new lower limit to its formation timescale and ruled out certain processes.

Agnibha De Sarkar et al 2023 ApJ 951 62

RS Ophiuchi undergoes nova outbursts every 15–20 years, and new data in the very-high-energy gamma-ray regime have enabled researchers to test a new model for the origin of its high-energy emission.