192 citations · 425 across the 13 of their papers we have counts for
9 papers · 1 filter
The Evolution of Luminous Red Nova AT 2017jfs in NGC 4470
A. Pastorello, T. -W. Chen, Y. -Z. Cai +43
We present the results of our photometric and spectroscopic follow-up of the intermediate-luminosity optical transient AT 2017jfs. At peak, the object reaches an absolute magnitude…
Magnetic bipoles in rotating turbulence with coronal envelope
I. R. Losada, J. Warnecke, A. Brandenburg +2
The formation of sunspots and starspots is not yet fully understood and is therefore one of the major open problems in solar and stellar physics. Magnetic flux concentrations can b…
A new look at sunspot formation using theory and observations
Illa R. Losada, Jörn Warnecke, Kolja Glogowski +4
Sunspots are of basic interest in the study of the Sun. Their relevance ranges from them being an activity indicator of magnetic fields to being the place where coronal mass ejecti…
Bipolar region formation in stratified two-layer turbulence
Jörn Warnecke, Illa R. Losada, Axel Brandenburg +2
This work presents an extensive study of the previously discovered formation of bipolar flux concentrations in a two-layer model. We interpret the formation process in terms of neg…
Magnetic flux concentrations from dynamo-generated fields
Sarah Jabbari, Axel Brandenburg, Illa R. Losada +2
The mean-field theory of magnetized stellar convection gives rise to the two possibility of distinct instabilities: the large-scale dynamo instability, operating in the bulk of the…
Bipolar magnetic structures driven by stratified turbulence with a coronal envelope
Jörn Warnecke, Illa R. Losada, Axel Brandenburg +2
We report the spontaneous formation of bipolar magnetic structures in direct numerical simulations of stratified forced turbulence with an outer coronal envelope. The turbulence is…
Magnetic flux concentrations in a polytropic atmosphere
I. R. Losada, A. Brandenburg, N. Kleeorin +1
Strongly stratified hydromagnetic turbulence has recently been identified as a candidate for explaining the spontaneous formation of magnetic flux concentrations by the negative ef…
Competition of rotation and stratification in flux concentrations
I. R. Losada, A. Brandenburg, N. Kleeorin +1
In a strongly stratified turbulent layer, a uniform horizontal magnetic field can become unstable to spontaneously form local flux concentrations due to a negative contribution of…
Rotational effects on the negative magnetic pressure instability
Illa R. Losada, A. Brandenburg, N. Kleeorin +2
The surface layers of the Sun are strongly stratified. In the presence of turbulence with a weak mean magnetic field, a large-scale instability resulting in the formation of non-un…