284 citations · 1.6k across the 29 of their papers we have counts for
15 papers · 1 filter
Coronal and chromospheric emission in A-type stars
Hans Moritz Günther, Carl Melis, J. Robrade +3
Cool stars on the main sequence generate X-rays from coronal activity, powered by a convective dynamo. With increasing temperature, the convective envelope becomes smaller and X-ra…
An Earth-like stellar wind environment for Proxima Centauri c
Julián D. Alvarado-Gómez, Jeremy J. Drake, Cecilia Garraffo +4
A new planet has been recently discovered around Proxima Centauri. With an orbital separation of au and a minimum mass of about , Proxima c is a prime…
Tuning the Exo-Space Weather Radio for Stellar Coronal Mass Ejections
Julián D. Alvarado-Gómez, Jeremy J. Drake, Federico Fraschetti +7
Coronal mass ejections (CMEs) on stars other than the Sun have proven very difficult to detect. One promising pathway lies in the detection of type II radio bursts. Their appearanc…
(Simulating) Coronal Mass Ejections in Active Stars
Julián D. Alvarado-Gómez, Jeremy J. Drake, Cecilia Garraffo +4
The stellar magnetic field completely dominates the environment around late-type stars. It is responsible for driving the coronal high-energy radiation (e.g. EUV/X-rays), the devel…
Coronal response to magnetically-suppressed CME events in M-dwarf stars
Julián D. Alvarado-Gómez, Jeremy J. Drake, Sofia P. Moschou +4
We report the results of the first state-of-the-art numerical simulations of Coronal Mass Ejections (CMEs) taking place in realistic magnetic field configurations of moderately act…
Magnetism in the Brown Dwarf Regime
Melodie M. Kao, J. Sebastian Pineda, Peter Williams +8
A suite of discoveries in the last two decades demonstrate that we are now at a point where incorporating magnetic behavior is key for advancing our ability to characterize substel…
Astro2020 Science White Paper: Fundamental Physics with Brown Dwarfs: The Mass-Radius Relation
Adam Burgasser, Isabelle Baraffe, Matthew Browning +17
The lowest-mass stars, brown dwarfs and giant exoplanets span a minimum in the mass-radius relationship that probes the fundamental physics of extreme states of matter, magnetism,…
The stellar rotation--activity relationship in fully convective M dwarfs
Nicholas J. Wright, Elisabeth R. Newton, Peter K. G. Williams +2
The coronal activity-rotation relationship is considered to be a proxy for the underlying stellar dynamo responsible for magnetic activity in solar and late-type stars. While this…
Magnetic cycles in a dynamo simulation of fully convective M-star Proxima Centauri
Rakesh K. Yadav, Ulrich R. Christensen, Scott J. Wolk +1
The recent discovery of an Earth-like exoplanet around Proxima Centauri has shined a spot light on slowly rotating fully convective M-stars. When such stars rotate rapidly (period…
Giant coronal loops dominate the quiescent X-ray emission in rapidly rotating M stars
O. Cohen, R. Yadav, C. Garraffo +5
Observations indicate that magnetic fields in rapidly rotating stars are very strong, on both small and large scales. What is the nature of the resulting corona? Here we seek to sh…
Explaining the coexistence of large-scale and small-scale magnetic fields in fully convective stars
Rakesh K. Yadav, Ulrich R. Christensen, Julien Morin +4
Despite the lack of a shear-rich tachocline region low-mass fully convective stars are capable of generating strong magnetic fields, indicating that a dynamo mechanism fundamentall…
Formation of starspots in self-consistent global dynamo models: Polar spots on cool stars
Rakesh K. Yadav, Thomas Gastine, Ulrich R. Christensen +1
Observations of cool stars reveal dark spot-like features on their surfaces. Compared to sunspots, starspots can be bigger or cover a larger fraction of the stellar surface. While…
From solar-like to anti-solar differential rotation in cool stars
T. Gastine, R. K. Yadav, J. Morin +2
Stellar differential rotation can be separated into two main regimes: solar-like when the equator rotates faster than the poles and anti-solar when the polar regions rotate faster…
Bridging planets and stars using scaling laws in anelastic spherical shell dynamos
Rakesh K. Yadav, Thomas Gastine, Ulrich R. Christensen +1
Dynamos operating in the interiors of rapidly rotating planets and low-mass stars might belong to a similar category where rotation plays a vital role. We quantify this similarity…
Consistent scaling laws in anelastic spherical shell dynamos
Rakesh K. Yadav, Thomas Gastine, Ulrich R. Christensen +1
Numerical dynamo models always employ parameter values that differ by orders of magnitude from the values expected in natural objects. However, such models have been successful in…