Kevin P. Reardon

Learn More
Recently, De Pontieu et al. (2007b) discovered a class of spicules that evolves more rapidly than previously known spicules, with rapid apparent motions of 50–150 km s −1 , thickness of a few 100 km, and lifetimes of order 10–60 seconds. These so-called type II spicules have been difficult to study because of limited spatio-temporal and thermal resolution.(More)
Context. The exact nature of the quiet solar chromosphere, and especially its temporal variations, are still subject of intense debate. One of the contentious issues is the possible role of magnetic field in structuring the quieter solar regions. Aims. We characterize the dynamics of the quiet inter-network chromosphere by studying the occurrence of(More)
Following its commissioning in 2019, the Daniel K. Inouye Solar Telescope (DKIST) will be the flagship facility for astrophysical investigations of the full solar atmosphere. The telescope is planned to acquire large volumes (5 PB per year, initially) of heterogeneous data over several decades using several different instruments. We discuss the challenges(More)
Context. Filtergrams obtained in Ca II H, Ca II K and Hα are often employed as diagnostics of the solar chromosphere. The vastly disparate appearance between the typical filtergrams in these different lines calls into question the nature of what is actually being observed. Aims. We investigate the lack of obvious structures of magnetic origin such as(More)
There are significant advantages in combining Hinode observations with ground-based instruments that can observe additional spectral diagnostics at higher data rates and with greater flexibility. However, ground-based observations , because of the random effects of weather and seeing as well as the complexities data analysis due to changing instrumental(More)
  • 1