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Low-frequency variability in massive stars: Core generation or surface phenomenon?
Daniel Lecoanet, Matteo Cantiello, Eliot Quataert +6
Bowman et al. (2019) reported low-frequency photometric variability in 164 O- and B-type stars observed with K2 and TESS. They interpret these motions as internal gravity waves, wh…
Differential Rotation in Convective Envelopes: Constraints from Eclipsing Binaries
Adam S. Jermyn, Jamie Tayar, Jim Fuller
Over time, tides synchronize the rotation periods of stars in a binary system to the orbital period. However, if the star exhibits differential rotation then only a portion of it c…
Thermal Regulation and the Star-Forming Main Sequence
Charles L. Steinhardt, Adam S. Jermyn, Jackie Lodman
We argue that the interplay between cosmic rays, the initial mass function, and star formation plays a crucial role in regulating the star-forming "main sequence". To explore these…
Abundant refractory sulfur in protoplanetary disks
Mihkel Kama, Oliver Shorttle, Adam S. Jermyn +5
Sulfur is one of the most abundant elements in the Universe, with important roles in astro-, geo-, and biochemistry. Its main reservoirs in planet-forming disks have previously elu…
Slowing the Spins of Stellar Cores
Jim Fuller, Anthony L. Piro, Adam S. Jermyn
The angular momentum (AM) evolution of stellar interiors, along with the resulting rotation rates of stellar remnants, remains poorly understood. Asteroseismic measurements of red…
Modules for Experiments in Stellar Astrophysics (MESA): Pulsating Variable Stars, Rotation, Convective Boundaries, and Energy Conservation
Bill Paxton, R. Smolec, Josiah Schwab +14
We update the capabilities of the open-knowledge software instrument Modules for Experiments in Stellar Astrophysics (MESA). RSP is a new functionality in MESAstar that models the…