322 citations · 532 across the 7 of their papers we have counts for
7 papers
Coronagraphic observations of Si X 1430 nm acquired by DKIST/Cryo-NIRSP with methods for telluric absorption correction
T. A. Schad, A. Fehlmann, G. I. Dima +6
We report commissioning observations of the Si X 1430 nm solar coronal line observed coronagraphically with the Cryogenic Near-Infrared Spectropolarimeter (Cryo-NIRSP) at the Natio…
Thomson scattering above solar active regions and an ad-hoc polarization correction method for the emissive corona
Thomas A. Schad, Sarah A. Jaeggli, Gabriel I Dima
Thomson scattered photospheric light is the dominant constituent of the lower solar corona's spectral continuum viewed off-limb at optical wavelengths. Known as the K-corona, it is…
Measurements of Photospheric and Chromospheric Magnetic Field Structures Associated with Chromospheric Heating over a Solar Plage Region
Tetsu Anan, Thomas A. Schad, Reizaburo Kitai +6
In order to investigate the relation between magnetic structures and the signatures of heating in plage regions, we observed a plage region with the He I 1083.0 nm and Si I 1082.7…
He I spectropolarimetry of a supersonic coronal downflow within a sunspot umbra
Thomas A. Schad, Gabriel I. Dima, Tetsu Anan
We report spectropolarimetric observations of a supersonic downflow impacting the lower atmosphere within a large sunspot umbra. This work is an extension of Schad et al. 2016 usin…
Using multi-line spectropolarimetric observations of forbidden emission lines to measure single-point coronal magnetic fields
Gabriel I. Dima, Thomas A. Schad
Polarized magnetic dipole (M1) emission lines provide important diagnostics for the magnetic field dominating the evolution of the solar corona. This paper advances a multi-line te…
The Universal Relation of Galactic Chemical Evolution: The Origin of the Mass-Metallicity Relation
Jabran Zahid, Gabriel Dima, Rolf Kudritzki +5
We examine the mass-metallicity relation for . The mass-metallicity relation follows a steep slope with a turnover or `knee' at stellar masses around $10^{10} M_\odo…
A Census of Oxygen in Star-Forming Galaxies: An Empirical Model Linking Metallicities, Star Formation Rates and Outflows
H. Jabran Zahid, Gabriel I. Dima, Lisa J. Kewley +2
In this contribution we present the first census of oxygen in star-forming galaxies in the local universe. We examine three samples of galaxies with metallicities and star formatio…