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Modelling time-dependent convective penetration in 1D stellar evolution
Cole Johnston, Mathias Michielsen, Evan H. Anders +7
1D stellar evolution calculations produce uncertain predictions for quantities like the age, core mass, core compactness, and nucleo-synthetic yields; a key source of uncertainty i…
In-plane Tidal Disruption of Stars in Disks of Active Galactic Nuclei
Taeho Ryu, Barry McKernan, Saavik Ford +4
Stars embedded in active galactic nucleus (AGN) disks or captured by them may scatter onto the supermassive black hole (SMBH), leading to a tidal disruption event (TDE). Using the…
The photometric variability of massive stars due to gravity waves excited by core convection
Evan H. Anders, Daniel Lecoanet, Matteo Cantiello +8
Massive stars die in catastrophic explosions, which seed the interstellar medium with heavy elements and produce neutron stars and black holes. Predictions of the explosion's chara…
Many Roads Lead to Lithium: Formation Pathways For Lithium-Rich Red Giants
Maryum Sayeed, Melissa K. Ness, Benjamin T. Montet +8
Stellar models predict that lithium (Li) inside a star is destroyed during the first dredge-up phase, yet 1.2% of red giant stars are Li-rich. We aim to uncover possible origins of…
Giant planet engulfment by evolved giant stars: light curves, asteroseismology, and survivability
Christopher E. O'Connor, Lars Bildsten, Matteo Cantiello +1
About ten percent of Sun-like (-) stars will engulf a - planet as they expand during the red giant branch (RGB) or asymptotic giant branch (AGB) phas…
Rotational modulation in A and F stars: Magnetic stellar spots or convective core rotation?
Andreea I. Henriksen, Victoria Antoci, Hideyuki Saio +7
The Kepler mission revealed a plethora of stellar variability in the light curves of many stars, some associated with magnetic activity or stellar oscillations. In this work, we an…