Speaker
Description
First Name: João M.
Last Name: da Silva Santos
Email Address: jdasilvasantos@nso.edu
Affiliation: National Solar Observatory (USA)
All Authors: Joshua Bentley, Serena Criscuoli, Tom Schad, Momchil Molnar, Alex Pietrow, Bart De Pontieu, Juan Martinez-Sykora
Abstract: Single-peak Mg II h&k profiles are commonly observed in solar plage regions, and they are known to indicate hot, dense chromospheres. However, the magnetic field topology of the atmosphere where these profiles form remains poorly constrained. We analyze coordinated IRIS and DKIST observations from a recent joint campaign, combining IRIS ultraviolet spectroscopy with DKIST/ViSP spectropolarimetry to obtain magnetic field diagnostics across multiple atmospheric layers. We examine the spatial relationship between locations showing single-peak Mg II profiles and the underlying chromospheric and photospheric magnetic field components. We discuss whether the results are consistent with heating due to field line braiding.