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First Results of Coordinated Observations from IRIS and New Solar Telescope

Sunquakes of Solar Cycle 23. First Results of Coordinated Observations from IRIS and New Solar Telescope. Alexander Kosovichev 1 , Wenda Cao 1 , Philip Goode 1 , Nicolas Gorceix 1 , Lucia Kleint 2,3 , Claude Plymate 1 , John R Varsik 1 , Sergiy Shumko 1 , Vasyl Yurchyshyn 1

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First Results of Coordinated Observations from IRIS and New Solar Telescope

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  1. Sunquakes of Solar Cycle 23 First Results of Coordinated Observations from IRIS and New Solar Telescope Alexander Kosovichev1, Wenda Cao1, Philip Goode1, Nicolas Gorceix1, Lucia Kleint2,3, Claude Plymate1, John R Varsik1, Sergiy Shumko1, Vasyl Yurchyshyn1 1Big Bear Solar Observatory, New Jersey Institute of Technology, Newark, NJ, 2Bay Area Environmental Research Institute, Palo Alto, CA, 3LMSAL, Palo Alto, CA Joint observations: AR 11850 (September 29 and 30, 2013) Interface Region Imaging Spectrograph (IRIS) SDO/HMI Fe I 6173 A IRIS Si IV 1400 A IRIS Mg II k 2796 A IRIS C II 1330 A AR11850 Diagram of IRIS spectrograph and slit-jaw imager: 20-cm UV telescope feeding a stigmatic UV spectrograph and a slit-jaw imager provide an unprecedented combination of 1/3 arcsec imaging with rapid high-resolution spectroscopy. IRIS target was AR 11850 close to West limb IRIS data reveal very dynamical active region chromosphere, ubiquitous eruptions. Strong activity is detected in the sunspot bridge area. The vertical line is the location of the spectrograph slit. NST/VIS Ha 6563 A NST/VIS Ha 6563-0.4 A NST/VIS Ha 6563+04 A NST/VIS Ha 6563+0.8 A NST/BFI observations reveal high-speed swirling flows in sunspot bridge. NST/VIS observation in Ha line and, particularly, in the line wings show complicated fibril structure and strong chromospheric downflows in the sunspot bridge area. Observations of Ellerman bombs and chromospheric dynamics: time series Ha 6563-0.8 A images • Conclusion and future plans • Initial joint observations of IRIS and NST show great potential for developing diagnostics active region dynamics from the deep photosphere to upper chromosphere and transition regions. • First results show that the enhanced chromospheric activity in the area of a sunspot light bridge may be associated with strong shearing and swirling flows in the bridge. NST observations also show that some chromospheric eruptions may be related to the Ellerman bomb phenomenon. • Next coordinated observations will include high-resolution spectro-polarimetric with Near InfraRed Imaging Spectropolarimeter (NIRIS) in Fe I 15648 A line. NST/VIS observations in the blue wing of Ha line reveal numerous Ellerman bombs: sudden brightening with emission extended in both line wings (usually stronger in the blue wing), and allow us to resolve their structure. Most of the Ellerman bomb activity was not far from the sunspot bridge area, and, perhaps, is related to strong shearing flows in this area. This series of images illustrates a development of one of the bombs.

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