251 citations · 1.4k across the 31 of their papers we have counts for
11 papers · 1 filter
The solar wind from a stellar perspective: how do low-resolution data impact the determination of wind properties?
S. Boro Saikia, M. Jin, C. P. Johnstone +5
Alfvén-wave-driven 3D magnetohydrodynamic (MHD) models, which are increasingly used to predict stellar wind properties, contain unconstrained parameters and rely on low-resolution…
Stellar activity and planetary atmosphere evolution in tight binary star systems
C. P. Johnstone, E. Pilat-Lohinger, T. Lüftinger +2
Context. In tight binary star systems, tidal interactions can significantly influence the rotational and orbital evolution of both stars, and therefore their activity evolution. Th…
Slingshot prominence evolution for a solar-like star
Carolina Villarreal D'Angelo, Moira Jardine, Colin P. Johnstone +1
Although the present-day Sun rotates too slowly to exhibit centrifugally-supported 'slingshot prominences', at some time during its past it may have formed these clouds of cool gas…
Identifying the "true" radius of the hot sub-Neptune CoRoT-24b by mass loss modelling
H. Lammer, N. V. Erkaev, L. Fossati +8
For the hot exoplanets CoRoT-24b and CoRoT-24c, observations have provided transit radii R of 3.70.4 R and 4.90.5 R, and masses of 5.…
Stellar magnetic activity and their influence on the habitability of exoplanets
T. Lüftinger, M. Güdel, C. P. Johnstone
Stellar magnetism, explorable via polarimetry, is a crucial driver of activity, ionization, photodissociation, chemistry and winds in stellar environments. Thus it has an important…
Short-period stellar activity cycles with Kepler photometry
Oleksiy V. Arkhypov, Maxim L. Khodachenko, Helmut Lammer +3
We study the short-periodic component of stellar activity with a cycle periods Pcyc up to 1000 days using the Kepler mission photometry of fast-rotating (rotational periods from 1…