TY - JOUR
T1 - PENUMBRAL WAVES DRIVING SOLAR FAN-SHAPED CHROMOSPHERIC JETS
AU - Reid, Aaron
AU - de Jorge Henriques, Vasco Manuel
AU - Mathioudakis, Michail
AU - Samanta, Tanmoy
PY - 2018/3/8
Y1 - 2018/3/8
N2 - We use Hα imaging spectroscopy taken via the Swedish 1-m Solar Telescope (SST) 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 to8 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 (SDO), indicating a very hot jet front, leaving behind optically thick cool plasma in its wake.
AB - We use Hα imaging spectroscopy taken via the Swedish 1-m Solar Telescope (SST) 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 to8 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 (SDO), indicating a very hot jet front, leaving behind optically thick cool plasma in its wake.
U2 - 10.3847/2041-8213/aab155
DO - 10.3847/2041-8213/aab155
M3 - Article
SP - 1
EP - 6
JO - The Astrophysical Journal Letters
JF - The Astrophysical Journal Letters
SN - 2041-8213
ER -