Characteristics of transverse waves in chromospheric mottles

Abstract

Using data obtained by the high temporal and spatial resolution Rapid Oscillations in the Solar Atmosphere (ROSA) instrument on the Dunn Solar Telescope, we investigate at an unprecedented level of detail transverse oscillations in chromospheric fine structures near the solar disk center. The oscillations are interpreted in terms of propagating and standing magnetohydrodynamic kink waves. Wave characteristics including the maximum transverse velocity amplitude and the phase speed are measured as a function of distance along the structure's length. Solar magneto-seismology is applied to these measured parameters to obtain diagnostic information on key plasma parameters (e.g., magnetic field, density, temperature, flow speed) of these localised waveguides. The magnetic field strength of the mottle along the $\sim$2 Mm length is found to decrease by a factor of 12, while the local plasma density scale height is $\sim 280\pm$80 km.

arXiv comment8 pages, 7 figures, accepted in ApJ

References in corpus (22)

• The formation of the Halpha line in the solar chromosphere
• Dynamic Fibrils are driven by Magnetoacoustic Shocks
• Ubiquitous torsional motions in type II spicules
• On-disk counterparts of type II spicules in the Ca II 854.2 nm and Halpha lines
• Propagating waves along spicules
• Flocculent flows in the chromospheric canopy of a sunspot
• Properties of Magneto-Hydrodynamic Waves in the Solar Photosphere with Hinode
• Magnetoacoustic shocks as driver of quiet Sun mottles
• Evidence for the photospheric excitation of incompressible chromospheric waves
• Interplay of three kinds of motion in the disk counterpart of type II spicules: up-flow, transversal and torsional motions
• Observation of kink waves in solar spicules
• Doppler shift oscillations in solar spicules
• Transverse oscillations in chromospheric mottles
• The Hanle and Zeeman Effects in Solar Spicules: A Novel Diagnostic Window on Chromospheric Magnetism
• The Origin of Type I Spicule Oscillations
• On the Size of Structures in the Solar Corona
• The Area Distribution of Solar Magnetic Bright Points
• On the magnetic field of off-limb spicules
• Kink waves in an active region dynamic fibril
• A study of Magnetic Bright Points in the Na I D1 line
• Acoustic oscillations in a field-free cavity under solar small-scale bipolar magnetic canopy
• Chromospheric jets around the edges of sunspots

Cited by in corpus (28)

• Multiwavelength studies of MHD waves in the solar chromosphere: An overview of recent results
• On the prevalence of small-scale twist in the solar chromosphere and transition region
• Wave Heating of the Solar Atmosphere
• On fibrils and field lines: The nature of H$\alpha$ fibrils in the solar chromosphere
• Heating effects from driven transverse and Alfvén waves in coronal loops
• The Dynamics of Rapid Redshifted and Blueshifted Excursions in the Solar Halpha line
• The Frequency-dependent Damping of Slow Magnetoacoustic Waves in a Sunspot Umbral Atmosphere
• Magnetic shocks and substructures excited by torsional Alfvén wave interactions in merging expanding flux tubes
• Determination of the cross-field density structuring in coronal waveguides using the damping of transverse waves
• High--cadence observations of spicular-type events on the Sun
• On Modeling the Kelvin--Helmholtz Instability in Solar Atmosphere
• High-resolution observations of active region moss and its dynamics
• Magneto-seismological insights into the penumbral chromosphere and evidence for wave damping in spicules
• Transverse motions in sunspot super-penumbral fibrils
• Transmission and conversion of magnetoacoustic waves on the magnetic canopy in a quiet Sun region
• Small-scale solar jet formation and their associated waves and instabilities
• Ultra-high-resolution Observations of MHD Waves in Photospheric Magnetic Structures
• High-frequency oscillations in small chromospheric bright features observed with ALMA
• Fast Standing Modes in Transversely Nonuniform Solar Coronal Slabs: Effects of a Finite Plasma Beta
• Propagating Kink Waves in an Open Coronal Magnetic Flux Tube with Gravitational Stratification: Magnetohydrodynamic Simulation and Forward Modelling
• Possible Evolution of Minifilament-Eruption-Produced Solar Coronal Jets, Jetlets, and Spicules, into Magnetic-Twist-Wave "Switchbacks" Observed by the Parker Solar Probe (PSP)
• Semi-empirical models of spicule from inversion of Ca II 8542 Å line
• Unveiling the True Nature of Plasma Dynamics from the Reference Frame of a Super-penumbral Fibril
• Propagating wave in active region-loops, located over the solar disk observed by the Interface Region Imaging Spectrograph
• Oscillatory behavior of chromospheric fine structures in a network and a semi-active regions
• The Sun at millimeter wavelengths IV. Magnetohydrodynamic waves in small-scale bright features
• A persistent quiet-Sun small-scale tornado. II. Oscillations
• Mode coupling in solar spicule oscillations