%0 Journal Article %1 citeulike:13410760 %A Testa, Paola %A De Pontieu, Bart %A Allred, Joel %A Carlsson, Mats %A Reale, Fabio %A Daw, Adrian %A Hansteen, Viggo %A Martinez-Sykora, Juan %A Liu, Wei %A DeLuca, Ed %A Golub, Leon %A McKillop, Sean %A Reeves, Kathy %A Saar, Steve %A Tian, Hui %A Lemen, Jim %A Title, Alan %A Boerner, Paul %A Hurlburt, Neal %A Tarbell, Ted %A Wuelser, J. P. %A Kleint, Lucia %A Kankelborg, Charles %A Jaeggli, Sarah %D 2014 %J Science %K imported %N 6207 %P 1255724 %R 10.1126/science.1255724 %T Evidence of Non-Thermal Particles in Coronal Loops Heated Impulsively by Nanoflares %U http://dx.doi.org/10.1126/science.1255724 %V 346 %X The physical processes causing energy exchange between the Sun's hot corona and its cool lower atmosphere remain poorly understood. The chromosphere and transition region (TR) form an interface region between the surface and the corona that is highly sensitive to the coronal heating mechanism. High resolution observations with the Interface Region Imaging Spectrograph (IRIS) reveal rapid variability (about 20 to 60 seconds) of intensity and velocity on small spatial scales at the footpoints of hot dynamic coronal loops. The observations are consistent with numerical simulations of heating by beams of non-thermal electrons, which are generated in small impulsive heating events called "coronal nanoflares". The accelerated electrons deposit a sizable fraction of their energy in the chromosphere and TR. Our analysis provides tight constraints on the properties of such electron beams and new diagnostics for their presence in the nonflaring corona.

@article{citeulike:13410760, abstract = {{The physical processes causing energy exchange between the Sun's hot corona and its cool lower atmosphere remain poorly understood. The chromosphere and transition region (TR) form an interface region between the surface and the corona that is highly sensitive to the coronal heating mechanism. High resolution observations with the Interface Region Imaging Spectrograph (IRIS) reveal rapid variability (about 20 to 60 seconds) of intensity and velocity on small spatial scales at the footpoints of hot dynamic coronal loops. The observations are consistent with numerical simulations of heating by beams of non-thermal electrons, which are generated in small impulsive heating events called "coronal nanoflares". The accelerated electrons deposit a sizable fraction of their energy in the chromosphere and TR. Our analysis provides tight constraints on the properties of such electron beams and new diagnostics for their presence in the nonflaring corona.}}, added-at = {2019-03-25T08:20:55.000+0100}, archiveprefix = {arXiv}, author = {Testa, Paola and De Pontieu, Bart and Allred, Joel and Carlsson, Mats and Reale, Fabio and Daw, Adrian and Hansteen, Viggo and Martinez-Sykora, Juan and Liu, Wei and DeLuca, Ed and Golub, Leon and McKillop, Sean and Reeves, Kathy and Saar, Steve and Tian, Hui and Lemen, Jim and Title, Alan and Boerner, Paul and Hurlburt, Neal and Tarbell, Ted and Wuelser, J. P. and Kleint, Lucia and Kankelborg, Charles and Jaeggli, Sarah}, biburl = {https://www.bibsonomy.org/bibtex/2b18f517d29123f5343687931408062e1/ericblackman}, citeulike-article-id = {13410760}, citeulike-linkout-0 = {http://arxiv.org/abs/1410.6130}, citeulike-linkout-1 = {http://arxiv.org/pdf/1410.6130}, citeulike-linkout-2 = {http://dx.doi.org/10.1126/science.1255724}, day = 22, doi = {10.1126/science.1255724}, eprint = {1410.6130}, interhash = {05bdf62ed70b9321703343186e81b917}, intrahash = {b18f517d29123f5343687931408062e1}, issn = {0036-8075}, journal = {Science}, keywords = {imported}, month = oct, number = 6207, pages = 1255724, posted-at = {2014-10-28 05:40:51}, priority = {2}, timestamp = {2019-03-25T08:20:55.000+0100}, title = {{Evidence of Non-Thermal Particles in Coronal Loops Heated Impulsively by Nanoflares}}, url = {http://dx.doi.org/10.1126/science.1255724}, volume = 346, year = 2014 }