100 citations · 753 across the 28 of their papers we have counts for
28 papers
Evolution of low mass population III stars from the pre-main sequence to the white dwarf cooling track
T. M. Lawlor, J. MacDonald
Radiation feedback from massive population III stars may have given rise to low mass star formation from primordial or nearly primordial material. If early universe low mass stars…
Mass loss on the red giant branch: plasmoid-driven winds above the RGB bump
D. J. Mullan, J. MacDonald
The onset of cool massive winds in evolved giants is correlated with an evolutionary feature on the red giant branch known as the bump. Also at the bump, shear instability in the s…
Magnetic inhibition of convection in O star envelopes
James MacDonald, Véronique Petit
It has been suggested that the absence of macroturbulence in the atmosphere of NGC 1624 - 2 is due its strong magnetic field (the strongest known for a massive O star) suppressing…
The umbral--penumbral boundary in sunspsots in the context of magneto-convection
D. J. Mullan, J. MacDonald
Jurcak et al (2018) have reported that, in a sample of more than 100 umbral cores in sunspots, the umbral-penumbral boundary (UPB) is characterized by a remarkably narrowly-defined…
Magnetic Fields on the Flare Star Trappist-1: Consequences for Radius Inflation and Planetary Habitability
D. J. Mullan, J. MacDonald, S. Dieterich +1
We construct evolutionary models of Trappist-1 in which magnetic fields impede the onset of convection according to a physics-based criterion. In the models that best fit all obser…
An explanation for the gap in the Gaia HRD for M dwarfs
James MacDonald, John Gizis
We show that the recently discovered narrow gap in the Gaia Hertzsprung - Russell Diagram near MG =10 can be explained by standard stellar evolution models and results from a dip i…