146 citations · 343 across the 16 of their papers we have counts for
13 papers · 1 filter
HST observations of chromospheric UV lines in the AGB star R Leo
Maryam Saberi, Donald G. Luttermoser, Graham M. Harper +3
The role of stellar chromospheres in the chemistry, mass loss, and evolution of cool evolved stars remains poorly understood. We present high-resolution ultraviolet spectra of the…
The striated solar photosphere observed at 0."03, resolution
D. Kuridze, F. Wöger, H. Uitenbroek +5
Striated granular edges observed in the solar photosphere represent one of the smallest-scale phenomena on the Sun. They arise from the interaction of strongly coupled hydrodynamic…
Magnetic diffusion in Solar atmosphere produces measurable electric fields
Tetsu Anan, Roberto Casini, Han Uitenbroek +13
The efficient release of magnetic energy in astrophysical plasmas, such as during solar flares, can in principle be achieved through magnetic diffusion, at a rate determined by the…
Estimation of projection effects in the polar magnetic field measurements from the ecliptic view
Sanjay Gosain, Han Uitenbroek
The distribution and evolution of the magnetic field at the solar poles through a solar cycle is an important parameter in understanding the solar dynamo. The accurate observations…
Insight into the solar plage chromosphere with DKIST
D. Kuridze, H. Uitenbroek, F. Wöger +11
The strongly coupled hydrodynamic, magnetic, and radiation properties of the plasma in the solar chromosphere makes it a region of the Sun's atmosphere that is poorly understood. W…
Improving the Understanding of Subsurface Structure and Dynamics of Solar Active Regions (A white paper submitted to the decadal survey for solar and space Physics (Heliophysics) -- SSPH 2024-2033)
S. C. Tripathy, K. Jain, D. Braun +14
The goal of helioseismology is to provide accurate information about the Sun's interior from the observations of the wave field at its surface. In the last three decades, both glob…
Resonant Absorption of Transverse Oscillations and Associated Heating in a Solar Prominence. II- Numerical aspects
Patrick Antolin, Takenori J. Okamoto, Bart De Pontieu +3
Transverse magnetohydrodynamic (MHD) waves are ubiquitous in the solar atmosphere and may be responsible for generating the Sun's million-degree outer atmosphere. However, direct e…
Interpretation of Solar Irradiance Monitor measurements through analysis of 3D MHD simulations
Serena Criscuoli, Han Uitenbroek
Measurements from the Solar Irradiance Monitor (SIM) onboard the SORCE mission indicate that solar spectral irradiance at Visible and IR wavelengths varies in counter phase with th…
Effects of unresolved magnetic field on Fe I 617.3 and 630.2 nm line shapes
Serena Criscuoli, Ilaria Ermolli, Han Uitenbroek +1
The contribution of the quiet Sun to solar irradiance variability, due either to changes of the solar effective temperature or to the presence of unresolved magnetic field, is stil…
On Molecular Hydrogen Formation and the Magnetohydrostatic Equilibrium of Sunspots
Sarah A. Jaeggli, Haosheng Lin, Han Uitenbroek
We have investigated the problem of sunspot magnetohydrostatic equilibrium with comprehensive IR sunspot magnetic field survey observations of the highly sensitive Fe I lines at 15…
Line shape effects on intensity measurements of solar features: Brightness correction to SoHO MDI continuum images
S. Criscuoli, I. Ermolli, D. Del Moro +4
Continuum intensity observations obtained with the Michelson Doppler Imager (MDI) on-board the SoHO mission provide long time series of filtergrams that are ideal for studying the…
Radiative emission of solar features in Ca II K
S. Criscuoli, I. Ermolli, J. Fontenla +4
We investigated the radiative emission of different types of solar features in the spectral range of the Ca II K line. We analyzed full-disk 2k x 2k observations from the PSPT Prec…
Recovering the Line-Of-Sight Magnetic Field in the Chromosphere from Ca II IR Spectra
F. Wöger, S. Wedemeyer-Böhm, H. Uitenbroek +1
We propose a method to derive the line-of-sight magnetic flux density from measurements in the chromospheric Ca II IR line at 854.2 nm. The method combines two well-understood tech…