Xiangdong Sun et al 2023 ApJ 942 55

Simulations suggest that if stars composed of hyperons — subatomic particles heavier than protons or neutrons that likely exist in the cores of neutron stars — are present, they might max out at just over twice the Sun’s mass.

Mar Mezcua et al 2023 ApJL 943 L5

Supermassive black holes in a sample of dwarf galaxies appear to be more massive than expected; if these dwarf galaxies grow to be massive galaxies, that means massive galaxies’ black holes could have originated in dwarf galaxies.

Sho Fujibayashi et al 2023 ApJ 942 39

The greater the difference in the masses of merging neutron stars, the more neutrons are expelled in the collision, resulting in the creation of heavier elements than in a merger with more equal masses.

Xuepeng Chen et al 2023 AJ 165 16

A newly discovered gaseous filament contains multiple intriguing structures, such as a 32-parsec-wide bubble that might be the result of a massive star’s winds that drove turbulent motion in the filament.

Tatiana M. Rodríguez et al 2023 ApJS 264 30

Researchers have detected silicon monoxide, which often indicates the presence of shocked gas, in the surroundings of what are suspected to be high-mass protostars.

Justin D. Finke and Soebur Razzaque 2023 ApJL 942 L21

Observations of extremely high-energy photons released in a recent gamma-ray burst might provide evidence for a violation of key tenet of special relativity — that the universe looks the same to all observers.