Abstract


  MHD WAVE DYNAMICS CAPTURED BY ROSA AT THE DUNN SOLAR TELESCOPE

  D. Jess, Queen's University Belfast, d.jess@qubac.uk

The Rapid Oscillations in the Solar Atmosphere (ROSA) and the Hydrogen-alpha Rapid Dynamics camera (HARDcam) are synchronised, high-cadence solar imaging systems that are available on the Dunn Solar Telescope at the National Solar Observatory in Sunspot, New Mexico, USA, as common-user instruments. Initially commissioned in 2008, the hardware has undergone several upgrades in recent years and now consists of 9 CCD/CMOS cameras capable of full-frame readout speeds approaching 75 Hz. To date, ROSA/HARDcam has helped make rapid progress in the detection, identification, characterisation and understanding of MHD wave phenomena propagating throughout the solar atmosphere. The ability to capture a variety of solar features through narrowband optical filters at high spatial (~100km) and temporal (>30 Hz) resolutions has allowed for unprecedented studies of both large- and small-scale oscillations, including those present in sunspot umbrae/penumbrae, spicules, mottles, fibrils, filaments and pores. Here I will briefly overview the current system capabilities, before highlighting some of the most recent results concerning wave detection in our Sunís atmosphere.