40 citations · 122 across the 7 of their papers we have counts for
7 papers
Complexity of magnetic fields on red dwarfs
N. Afram, S. V. Berdyugina
Magnetic fields in cool stars can be investigated by measuring Zeeman line broadening and polarization in atomic and molecular lines. Similar to the Sun, these fields are complex a…
Molecules as magnetic probes of starspots
Nadine Afram, Svetlana V. Berdyugina
Stellar dynamo processes can be explored by measuring the magnetic field. This is usually obtained using the atomic and molecular Zeeman effect in spectral lines. While the atomic…
Intensity contrast from MHD simulations and from HINODE observations
N. Afram, Y. C. Unruh, S. K. Solanki +3
Changes in the solar surface area covered by small-scale magnetic elements are thought to cause long-term changes in the solar spectral irradiance, which are important for determin…
A comparison of measured and simulated solar network contrast
N. Afram, Y. C. Unruh, S. K. Solanki +2
Long-term trends in the solar spectral irradiance are important to determine the impact on Earth's climate. These long-term changes are thought to be caused mainly by changes in th…
First polarimetric observations and modeling of the FeH F^4 Delta-X^4 Delta system
N. Afram, S. V. Berdyugina, D. M. Fluri +3
Lines of diatomic molecules are more temperature and pressure sensitive than atomic lines, which makes them ideal tools for studying cool stellar atmospheres an internal structure…
Detection of the Molecular Zeeman Effect in Circular Polarization on Cool Active Stars
S. V. Berdyugina, P. Petit, D. M. Fluri +2
We report on the first ever detection of circular polarization in molecular lines forming in magnetic regions on the surfaces of active stars. The new observations were obtained wi…