Possible Production of Solar Spicules by Microfilament Eruptions

Abstract

We examine Big Bear Solar Observatory (BBSO) Goode Solar Telescope (GST) high-spatial resolution (0''.06), high-cadence (3.45 s), H-alpha-0.8 Angstrom images of central-disk solar spicules, using data of Samanta et al. (2019). We compare with coronal-jet chromospheric-component observations of Sterling et al. (2010a). Morphologically, bursts of spicules, referred to as "enhanced spicular activities" by Samanta et al. (2019), appear as scaled-down versions of the jet's chromospheric component. Both the jet and the enhanced spicular activities appear as chromospheric-material strands, undergoing twisting-type motions of ~20---50 km/s in the jet and ~20---30 km/s in the enhanced spicular activities. Presumably, the jet resulted from a minifilament-carrying magnetic eruption. For two enhanced spicular activities that we examine in detail, we find tentative candidates for corresponding erupting microfilaments, but not expected corresponding base brightenings. Nonetheless, the enhanced-spicular-activities' interacting mixed-polarity base fields, frequent-apparent-twisting motions, and morphological similarities to the coronal jet's chromospheric-temperature component, suggest that erupting microfilaments might drive the enhanced spicular activities but be hard to detect, perhaps due to H-alpha opacity. Degrading the BBSO/GST-image resolution with a 1''.0-FWHM smoothing function yields enhanced spicular activities resembling the "classical spicules" described by, e.g., Beckers (1968). Thus, a microfilament eruption might be the fundamental driver of many spicules, just as a minifilament eruption is the fundamental driver of many coronal jets. Similarly, a 0".5-FWHM smoothing renders some enhanced spicular activities to resemble previously-reported "twinned" spicules, while the full-resolution features might account for spicules sometimes appearing as 2D-sheet-like structures.

References in corpus (23)

• Chromospheric Anemone Jets as Evidence of Ubiquitous Reconnection
• Solar Coronal Jets: Observations, Theory, and Modeling
• Small-scale filament eruptions as the driver of solar coronal hole X-ray jets
• Prevalence of Small-scale Jets from the Networks of the Solar Transition Region and Chromosphere
• On the generation of solar spicules and Alfvénic waves
• Generation of Solar Spicules and Subsequent Atmospheric Heating
• STEREO/SECCHI Stereoscopic Observations Constraining the Initiation of Polar Coronal Jets
• On the prevalence of small-scale twist in the solar chromosphere and transition region
• Magnetic Flux Cancellation as the Trigger of Solar Quiet-Region Coronal Jets
• Search for high velocities in the disk counterpart of type II spicules
• Statistical properties of the Disk Counterparts of Type II Spicules from simultaneous observations of RBEs in Ca II 8542 and Hα
• Three-dimensional Magnetohydrodynamic Simulation of the Formation of Solar Chromospheric Jets with Twisted Magnetic Field Lines
• Magnetic Flux Cancelation as the Origin of Solar Quiet Region Pre-Jet Minifilaments
• Revision of Solar Spicule Classification
• The Role of Type II Spicules in the Upper Solar Atmosphere
• Magnetic Untwisting in Solar Jets that Go into the Outer Corona in Polar Coronal Holes
• Hi-C 2.1 Observations of Jetlet-like Events at Edges of Solar Magnetic Network Lane
• Are Chromospheric Nanoflares a Primary Source of Coronal Plasma?
• A Microfilament-Eruption Mechanism for Solar Spicules
• On the multi-threaded nature of solar spicules
• Alfvenic waves in polar spicules
• Hi-C 2.1 Observations of Small-Scale Miniature-Filament-Eruption-Like Cool Ejections in Active Region Plage
• Rapid Evolution of Type II Spicules Observed in Goode Solar Telescope On-Disk H-alpha Images

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• Inconspicuous Solar Polar Coronal X-ray Jets as the Source of Conspicuous Hinode/EUV Imaging Spectrometer (EIS) Doppler Outflows
• Prospective Implications of EUV Coronal Plumes for Magnetic-network Genesis of Coronal Heating, Coronal-hole Solar Wind, and Solar-wind Magnetic-field Switchbacks