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Jiaming Liu et al 2021 ApJS 254 20

A systematic search for stellar groups in the Taurus field has yielded 22 groups, including 8 young (2–4 Myr) groups at distances of ~130–170 pc, and 14 old (8–49 Myr) groups at distances of ~110–210 pc.

S. E. Woosley and Alexander Heger 2021 ApJL 912 L31

New calculations explore four factors affecting the theoretical boundaries of the pair instability black-hole mass gap: nuclear reaction rates, evolution in detached binaries, rotation, and hyper-Eddington accretion after birth.

Jun Hashimoto et al 2021 AJ 161 264

ALMA observations of a protoplanetary disk surrounding ZZ Tau IRS reveal asymmetry that points to giant planet formation around this low-mass star — an outcome that challenges existing core accretion models.

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