Modelling the connection between propagating disturbances and solar spicules

Abstract

Propagating (intensity) disturbances (PDs) are well reported in observations of coronal loops and polar plumes in addition to recent links with co-temporal spicule activity in the solar atmosphere. However, despite being reported in observations, they are yet to be studied in depth and understood from a modelling point of view. In this work, we present results from a 3D MHD numerical model featuring a stratified solar atmosphere which is perturbed by a p-mode wave driver at the photosphere, subsequently forming spicules described by the rebound shock model. Features with striking characteristics to those of detected PDs appear consistent with the co-temporal transition region dynamics and spicular activity resulting from nonlinear wave steepening and shock formation. Furthermore, the PDs can be interpreted as slow magnetoacoustic pulses propagating along the magnetic field, rather than high speed plasma upflows, carrying sufficient energy flux to at least partially heat the lower coronal plasma. Using forward modelling, we demonstrate the similarities between the PDs in the simulations and those reported in observations from IRIS and SDO/AIA. Our results suggest that, in the presented model, the dynamical movement of the transition region is a result of wave dynamics and shock formation in the lower solar atmosphere, and that PDs are launched co-temporally with the rising of the transition region, regardless of the wave-generating physical mechanisms occurring in the underlying lower solar atmosphere. However, it is clear that signatures of PDs appear much clearer when a photospheric wave driver is included. Finally, we present the importance of PDs in the context of providing a source for powering the (fast) solar wind

arXiv comment10 pages, 11 figures. Accepted for publication in A&A

References in corpus (49)

• PLUTO: a Numerical Code for Computational Astrophysics
• The Interface Region Imaging Spectrograph (IRIS)
• On Solving the Coronal Heating Problem
• The stellar atmosphere simulation code Bifrost
• Prevalence of Small-scale Jets from the Networks of the Solar Transition Region and Chromosphere
• The formation of IRIS diagnostics II. The formation of the Mg II h&k lines in the solar atmosphere
• Extension of the MURaM radiative MHD code for coronal simulations
• On the generation of solar spicules and Alfvénic waves
• Persistent Doppler shift oscillations observed with HINODE/EIS in the solar corona: spectroscopic signatures of Alfvenic waves and recurring upflows
• Solar fine-scale structures. I. Spicules and other small-scale, jet-like events at the chromospheric level: observations and physical parameters
• Generation of Solar Spicules and Subsequent Atmospheric Heating
• The formation of IRIS diagnostics I. A quintessential model atom of Mg II and general formation properties of the Mg II h&k lines
• Origins of the Ambient Solar Wind: Implications for Space Weather
• Magnetic Reconnection as the Driver of the Solar Wind
• Numerical simulations of conversion to Alfven waves in sunspots
• The Spectroscopic Signature of Quasi-periodic Upflows in Active Region Timeseries
• Propagating slow magnetoacoustic waves in coronal loops observed by Hinode/EIS
• MHD Waves in open coronal structures
• A Particle Module for the PLUTO Code: I - an implementation of the MHD-PIC equations
• Formation of quasi-periodic slow magnetoacoustic wave trains by the heating/cooling misbalance
• Picoflare jets power the solar wind emerging from a coronal hole on the Sun
• Generation of quasi-periodic waves and flows in the solar atmosphere by oscillatory reconnection
• Coronal rain in magnetic arcades: Rebound shocks, Limit cycles, and Shear flows
• Omnipresent long-period intensity oscillations in open coronal structures
• The Independency of Stellar Mass Loss Rates on stellar X-ray Luminosity and Activity Level based on Solar X-ray flux and Solar Wind Observations
• Propagating intensity disturbances in polar corona as seen from AIA/SDO
• Quasiperiodic Energy Release and Jets at the Base of Solar Coronal Plumes
• Propagating waves in polar coronal holes as seen by SUMER and EIS
• Observations and numerical models of solar coronal heating associated with spicules
• 3D MHD modeling of twisted coronal loops
• Propagating Disturbances in The Solar Corona and Spicular Connection
• Three-dimensional MHD modeling of propagating disturbances in fan-like coronal loops
• Sources of quasi-periodic propagating disturbances above a solar polar coronal hole
• Observational Signatures of Waves and Flows in the Solar Corona
• Origin of the chromospheric three-minute oscillations in sunspot umbrae
• MHD modeling of coronal loops: the transition region throat
• On the Parallel and Perpendicular Propagating Motions Visible in Polar Plumes: An Incubator For (Fast) Solar Wind Acceleration?
• Chromospheric seismology above sunspot umbrae
• The chromosphere underneath a Coronal Bright Point
• EUV fine structure and variability associated with coronal rain revealed by Solar Orbiter/EUI HRIEUV and SPICE
• MHD modeling of coronal loops: injection of high-speed chromospheric flows
• Small-scale solar jet formation and their associated waves and instabilities
• A Statistical Study on The Frequency-Dependent Damping of Slow-mode Waves in Polar Plumes and Interplumes
• Alfvénic motions arising from asymmetric acoustic wave drivers in solar magnetic structures
• Observations of upward propagating waves in the transition region and corona above Sunspots
• The fine-scale structure of polar coronal holes
• Damping and power spectra of quasi-periodic intensity disturbances above a solar polar coronal hole
• On the Nature of Propagating Intensity Disturbances in Polar Plumes during the 2017 Total Solar Eclipse
• Accelerating and Supersonic Density Fluctuations in Coronal Hole Plumes: Signature of Nascent Solar Winds

Cited by in corpus (5)

• Coronal hole picoflare jets are progenitors of both fast and Alfvénic slow solar wind
• The Relation between Solar Spicules and Magnetohydrodynamic Shocks
• Bright Dots and Coronal Plume Formation in Sunspot Penumbra
• Detection of wave activity within a realistic 3D MHD quiet sun simulation
• On the Relationship between Solar Spicules and Propagating Coronal Disturbances: The Role of Shocks