Fengyue Guo et al 2023 AJ 165 40
Chemically peculiar barium stars, first discovered in the 1950s, show enhanced abundances of s-process (slow neutron capture) elements, which might result from pollution from a binary companion.
A. Y. Ibrahim et al 2023 ApJ 943 20
The X-ray and radio emission characteristics of a young magnetar — a highly magnetized neutron star — can tell us about the object’s neighborhood, including the diffuse supernova remnant that surrounds it.
Ryoko Ishioka et al 2023 ApJS 265 18
A survey of 92 unclassified objects turned up 42 young stellar objects and 50 protoplanetary nebulae, evolved stars, and dust-shrouded stars, plus a few objects that still defy classification.
Richard J. Cartwright et al 2023 Planet. Sci. J. 4 42
Spectra of Umbriel show features at infrared wavelengths that may be due to a variety of intriguing compounds, but the proposed compounds produce spectral features at other wavelengths that are not seen.
Man Ho Chan and Chak Man Lee 2023 ApJL 943 L11
Two instances of stars falling toward stellar-mass black holes faster than expected may provide evidence of dark matter density spikes in the vicinity of these black holes, which could help us characterize dark matter.
Samayra M. Straal et al 2023 ApJ 942 103
A glowing region of gas powered by a rapidly spinning neutron star left over after a supernova might have a second power source: a massive, evolved star on its way to becoming a supernova itself.