ALMA and IRIS Observations of the Solar Chromosphere I: an On-Disk Type II Spicule

Abstract

We present observations of the solar chromosphere obtained simultaneously with the Atacama Large Millimeter/submillimeter Array (ALMA) and the Interface Region Imaging Spectrograph (IRIS). The observatories targeted a chromospheric plage region of which the spatial distribution (split between strongly and weakly magnetized regions) allowed the study of linear-like structures in isolation, free of contamination from background emission. Using these observations in conjunction with a radiative magnetohydrodynamic 2.5D model covering the upper convection zone all the way to the corona that considers non-equilibrium ionization effects, we report the detection of an on-disk chromospheric spicule with ALMA and confirm its multithermal nature.

arXiv comment29 pages, 9 figures, Accepted for publication in the Astrophysical Journal. This version replaces the previous submission, which is now split into two companion papers

References in corpus (42)

• The Interface Region Imaging Spectrograph (IRIS)
• A multi-scale multi-frequency deconvolution algorithm for synthesis imaging in radio interferometry
• The Atacama Large Millimeter/submillimeter Array
• The stellar atmosphere simulation code Bifrost
• Prevalence of Small-scale Jets from the Networks of the Solar Transition Region and Chromosphere
• Observing the Roots of Solar Coronal Heating - in the Chromosphere
• Dynamic Hydrogen Ionization
• Non-equilibrium hydrogen ionization in 2D simulations of the solar atmosphere
• An Interface Region Imaging Spectrograph first view on Solar Spicules
• Solar science with the Atacama Large Millimeter/submillimeter Array - A new view of our Sun
• RH 1.5D: a massively parallel code for multi-level radiative transfer with partial frequency redistribution and Zeeman polarisation
• Search for high velocities in the disk counterpart of type II spicules
• Non-LTE inversions of the Mg II h&k and UV triplet lines
• Observing the Sun with the Atacama Large Millimeter-submillimeter Array (ALMA): Fast-Scan Single-Dish Mapping
• Three-dimensional Magnetohydrodynamic Simulation of the Formation of Solar Chromospheric Jets with Twisted Magnetic Field Lines
• Observing the Sun with Atacama Large Millimeter/submillimeter Array (ALMA): High Resolution Interferometric Imaging
• Heating signatures in the disk counterparts of solar spicules in IRIS observations
• The Role of Type II Spicules in the Upper Solar Atmosphere
• Two-dimensional Radiative Magnetohydrodynamic Simulations of Partial Ionization in the Chromosphere. II. Dynamics and Energetics of the Low Solar Atmosphere
• Millimeter radiation from a 3D model of the solar atmosphere I. Diagnosing chromospheric thermal structure
• A method for global inversion of multi-resolution solar data
• Ion-neutral interactions and non-equilibrium ionization in the solar chromosphere
• Non-equilibrium helium ionization in an MHD simulation of the solar atmosphere
• Heating of the magnetic chromosphere: observational constraints from Ca II 8542 spectra
• Impact of Type II Spicules in the Corona: Simulations and Synthetic Observables
• What causes the high apparent speeds in chromospheric and transition region spicules on the Sun?
• Quiet Sun Hα Transients and Corresponding Small-Scale Transition Region and Coronal Heating
• Inter-network regions of the Sun at millimetre wavelengths
• The Sun at millimeter wavelengths I. Introduction to ALMA Band 3 observations
• A First Comparison of Millimeter Continuum and Mg II Ultraviolet Line Emission from the Solar Chromosphere
• On the Active Region Bright Grains Observed in the Transition Region Imaging Channels of IRIS
• H-alpha features with hot onsets III. Fibrils in Lyman-alpha and with ALMA
• Ambipolar diffusion in the Bifrost code
• Fourier Plane Image Combination by Feathering
• Asymmetries in Coronal Spectral lines and Emission Measure Distribution
• Bridging the Gap: Capturing the Ly$\alpha$ Counterpart of a Type-II Spicule and its Heating Evolution with VAULT2.0 and IRIS Observations
• The Formation Height of Millimeter-wavelength Emission in the Solar Chromosphere
• ALMA Observations of the Solar Chromosphere on the Polar Limb
• IRIS Mg II Observations and Non-LTE Modeling of Off-limb Spicules in a Solar Polar Coronal Hole
• Core and Wing Densities of Asymmetric Coronal Spectral Profiles: Implications for the Mass Supply of the Solar Corona
• Estimating the temperature and density of a spicule from 100 GHz data obtained with ALMA
• ALMA and IRIS Observations of the Solar Chromosphere II: Structure and Dynamics of Chromospheric Plage

Cited by in corpus (13)

• High Frequency Waves in Chromospheric Spicules
• ALMA and IRIS Observations of the Solar Chromosphere II: Structure and Dynamics of Chromospheric Plage
• Evidence of multithermal nature of spicular downflows. Impact on solar atmospheric heating
• Small-scale solar jet formation and their associated waves and instabilities
• The Sun at millimeter wavelengths. III. Impact of the spatial resolution on solar ALMA observations
• A first look at the submillimeter Sun with ALMA
• Detection of faculae in the transit and transmission spectrum of WASP-69b
• Propagation of transverse waves in the solar chromosphere probed at different heights with ALMA sub-bands
• Multi-fluid Simulation of Solar Chromospheric Turbulence and Heating Due to the Thermal Farley-Buneman Instability
• Power distribution of oscillations in the atmosphere of a plage region: Joint observations with ALMA, IRIS and SDO
• A new view of the solar interface region from the Interface Region Imaging Spectrograph (IRIS)
• The Solar ALMA Science Archive (SALSA)
• The Sun at millimeter wavelengths V. Magnetohydrodynamic waves in a fibrillar structure