We use H α imaging spectroscopy taken via the Swedish 1 m Solar Telescope to investigate the occurrence of fan-shaped jets at the solar limb. We show evidence for near-simultaneous photospheric reconnection at a sunspot edge leading to the jets appearance, with upward velocities of 30 km s −1 , and extensions up to 8 Mm. The brightening at the base of the jets appears recurrent, with a periodicity matching that of the nearby sunspot penumbra, implying running penumbral waves could be the driver of the jets. The jets’ constant extension velocity implies that a driver counteracting solar gravity exists, possibly as a result of the recurrent reconnection erupting material into the chromosphere. These jets also show signatures in higher temperature lines captured from the Solar Dynamics Observatory , indicating a very hot jet front, leaving behind optically thick cool plasma in its wake.
CITATION STYLE
Reid, A., Henriques, V. M. J., Mathioudakis, M., & Samanta, T. (2018). Penumbral Waves Driving Solar Fan-shaped Chromospheric Jets. The Astrophysical Journal Letters, 855(2), L19. https://doi.org/10.3847/2041-8213/aab155
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