000007136 001__ 7136
000007136 005__ 20241107134958.0
000007136 037__ $$aSCART-2024-0184
000007136 100__ $$aNelson, C. J. 
000007136 245__ $$aA multi-instrument study of ultraviolet bursts and associated surges in AR 12957
000007136 260__ $$c2024
000007136 520__ $$aThe relationship between UV Bursts and solar surges is complex, with these events sometimes being observed together and sometimes being observed independently. Why this sporadic association exists is unknown, however, it likely relates to the physical conditions at the site of the energy release that drives these events. Here, we aim to better understand the relationship between UV Bursts and solar surges through a multi-instrument analysis of several associated events that occurred around the trailing sunspot in AR 12957. We use data from Solar Orbiter, the Solar Dynamics Observatory (SDO), and the Interface Region Imaging Spectrograph (IRIS) to achieve our aims. These data were sampled on 3rd March 2022 between 09:30:30 UT and 11:00:00 UT, during which time a coordinated observing campaign associated with the Slow Solar Wind Connection Solar Orbiter Observing Plan took place. Numerous small-scale negative polarity magnetic magnetic features (MMFs) are observed to move quickly (potentially up to 3.3 km/s) away from a sunspot until they collide with a more stable positive polarity plage region around 7 Mm away. Several UV Bursts are identified in IRIS slit-jaw imager (SJI) 1400 Å data co-spatial to where these opposite polarity fields interact, with spatial scales (2 Mm<) and lifetimes (20< min) larger than typical values for such events. Two surges are also observed to occur at these locations, with one being short (5 Mm) and hot (bright in IRIS SJI images), whilst the other is a cooler (dark in coronal imaging channels), longer surge that appears to fill an active region loop. Magnetic reconnection between the negative polarity MMFs around the sunspot and the positive polarity plage region appears to be the driver of these events. Both the speed of the MMFs and the locally open magnetic topology of the plage region could possibly be important for forming the surges.
000007136 594__ $$aNO
000007136 6531_ $$aSun
000007136 6531_ $$acorona
000007136 6531_ $$aEUV brightenings
000007136 700__ $$aCalchetti, D. 
000007136 700__ $$aGandorfer, A. 
000007136 700__ $$aHirzberger, J. 
000007136 700__ $$aSinjan, J. 
000007136 700__ $$aSolanki, S. K. 
000007136 700__ $$aBerghmans, D. 
000007136 700__ $$aStrecker, H. 
000007136 700__ $$aBlanco, J.
000007136 773__ $$pAstronomy & Astrophysics$$y2024
000007136 8560_ $$fdavid.berghmans@ksb-orb.be
000007136 85642 $$ahttps://ui.adsabs.harvard.edu/abs/2024arXiv241007770N/abstract
000007136 905__ $$ain press to
000007136 980__ $$aREFERD