38 citations · 70 across the 6 of their papers we have counts for
6 papers
Evolution of Solar-Type Activity: Acoustic and Magnetic Energy Generation and Propagation in Beta Hydri (G2 IV)
Diaa E. Fawzy, Manfred Cuntz
We examine the acoustic and magnetic energy generation and propagation in beta Hydri (G2 IV). The underlying motivation for this work is based on the solar, stellar, and galactic r…
Chromospheric Activity in 55 Cancri: II. Theoretical Wave Studies versus Observations
M. Cuntz, K. -P. Schröder, D. E. Fawzy +1
In this study, we consider chromospheric heating models for 55 Cancri in conjunction with observations. The theoretical models, previously discussed in Paper I, are self-consistent…
Chromospheric Activity in 55 Cancri: I. Results from Theoretical Wave Studies
Diaa E. Fawzy, Manfred Cuntz
We present theoretical models of chromospheric heating for 55 Cancri, an orange dwarf of relatively low activity. Self-consistent, nonlinear and time-dependent ab-initio numerical…
The Secret Lives of Cepheids: Cep -- the Prototype of a New Class of Pulsating X-ray Variable Stars
Scott G. Engle, Edward F. Guinan, Dr. Graham M. Harper +4
From our Secret Lives of Cepheids program, the prototype Classical Cepheid, Cep, is found to be an X-ray source with periodic pulsation-modulated X-ray variations. This finding…
Solar Magnetic Flux Tube Simulations with Time-Dependent Ionization
Diaa E. Fawzy, Manfred Cuntz, Wolfgang Rammacher
In the present work we expand the study of time-dependent ionization previously identified to be of pivotal importance for acoustic waves in solar magnetic flux tube simulations. W…
Generation of Longitudinal Flux Tube Waves in Theoretical Main-Sequence Stars: Effects of Model Parameters
Diaa E. Fawzy, M. Cuntz
Context. Continued investigation of the linkage between magneto-acoustic energy generation in stellar convective zones and the energy dissipation and radiative emission in outer st…