PENUMBRAL WAVES DRIVING SOLAR FAN-SHAPED CHROMOSPHERIC JETS

Aaron Reid; Vasco Manuel de Jorge Henriques; Michail Mathioudakis; Tanmoy Samanta

doi:10.3847/2041-8213/aab155

PENUMBRAL WAVES DRIVING SOLAR FAN-SHAPED CHROMOSPHERIC JETS

Aaron Reid, Vasco Manuel de Jorge Henriques, Michail Mathioudakis, Tanmoy Samanta

School of Mathematics and Physics

Research output: Contribution to journal › Article › peer-review

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Abstract

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.

Original language	English
Pages (from-to)	1-6
Journal	Astrophysical Journal Letters
DOIs	https://doi.org/10.3847/2041-8213/aab155
Publication status	Published - 08 Mar 2018

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Penumbral Waves Driving Solar Fan-shaped Chromospheric Jets
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Cite this

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title = "PENUMBRAL WAVES DRIVING SOLAR FAN-SHAPED CHROMOSPHERIC JETS",

abstract = "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{\textquoteright} 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.",

author = "Aaron Reid and {de Jorge Henriques}, {Vasco Manuel} and Michail Mathioudakis and Tanmoy Samanta",

year = "2018",

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doi = "10.3847/2041-8213/aab155",

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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

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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

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JO - The Astrophysical Journal Letters

JF - The Astrophysical Journal Letters

SN - 2041-8213

ER -

PENUMBRAL WAVES DRIVING SOLAR FAN-SHAPED CHROMOSPHERIC JETS

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