Element Abundances: A New Diagnostic for the Solar Wind
arXiv:1905.09319 · doi:10.3847/1538-4357/ab23f1
Abstract
We examine the different element abundances exhibited by the closed loop solar corona and the slow speed solar wind. Both are subject to the First Ionization Potential (FIP) Effect, the enhancement in coronal abundance of elements with FIP below 10 eV (e.g. Mg, Si, Fe) with respect to high FIP elements (e.g. O, Ne, Ar), but with subtle differences. Intermediate elements, S, P, and C, with FIP just above 10 eV, behave as high FIP elements in closed loops, but are fractionated more like low FIP elements in the solar wind. On the basis of FIP fractionation by the ponderomotive force in the chromosphere, we discuss fractionation scenarios where this difference might originate. Fractionation low in the chromosphere where hydrogen is neutral enhances the S, P and C abundances. This arises with nonresonant waves, which are ubiquitous in open field regions, and is also stronger with torsional Alfven waves, as opposed to shear (i.e. planar) waves. We discuss the bearing these findings have on models of interchange reconnection as the source of the slow speed solar wind. The outflowing solar wind must ultimately be a mixture of the plasma in the originally open and closed fields, and the proportions and degree of mixing should depend on details of the reconnection process. We also describe novel diagnostics in ultraviolet and extreme ultraviolet spectroscopy now available with these new insights, with the prospect of investigating slow speed solar wind origins and the contribution of interchange reconnection by remote sensing.
arXiv comment21 pages, accepted by ApJ
References in corpus (47)
- The chemical composition of the Sun
- Atomic Data for Astrophysics. II. New Analytic Fits for Photoionization Cross Sections of Atoms and Ions
- Ionization balance for optically thin plasmas: rate coefficients for all atoms and ions of the elements H to Ni
- Solar Chemical Abundances Determined with a CO5BOLD 3D Model Atmosphere
- Self-consistent Coronal Heating and Solar Wind Acceleration from Anisotropic Magnetohydrodynamic Turbulence
- On the Generation, Propagation, and Reflection of Alfven Waves from the Solar Photosphere to the Distant Heliosphere
- The FIP and Inverse FIP Effects in Solar and Stellar Coronae
- A Model for the Sources of the Slow Solar Wind
- The photospheric solar oxygen project: I. Abundance analysis of atomic lines and influence of atmospheric models
- Dynamic Hydrogen Ionization
- A new approach to analyzing solar coronal spectra and updated collisional ionization equilibrium calculations. II. Additional ionization rate coefficients
- Direct Detection of a CME-Associated Shock in LASCO White Light Images
- How Many CMEs Have Flux Ropes? Deciphering the Signatures of Shocks, Flux Ropes, and Prominences in Coronagraph Observations of CMEs
- A Unified Picture of the FIP and Inverse FIP Effects
- The elemental composition of the Sun III. The heavy elements Cu to Th
- The effect of temperature anisotropy on observations of Doppler dimming and pumping in the inner corona
- Observations and Interpretation of a Low Coronal Shock Wave Observed in the EUV by the SDO/AIA
- Non-WKB Models of the FIP Effect: Implications for Solar Coronal Heating and the Coronal Helium and Neon Abundances
- Far UV Spectra of Fast Coronal Mass Ejections Associated with X-class Flares
- Estimating the "Dark" Energy Content of the Solar Corona
- Instabilities Driven by the Drift and Temperature Anisotropy of Alpha Particles in the Solar Wind
- Non-WKB Models of the FIP Effect: The Role of Slow Mode Waves
- Stochastic Heating, Differential Flow, and the Alpha-to-Proton Temperature Ratio in the Solar Wind
- Wave Propagation and Jet Formation in the Chromosphere
- What do iris observations of Mg II k tell us about the solar plage chromosphere?
- Structured Slow Solar Wind Variability: Streamer-blob Flux Ropes and Torsional Alfvén Waves
- Alfvén Wave Heating of the Solar Chromosphere: 1.5D models
- The First Ionization Potential Effect from the Ponderomotive Force: On the Polarization and Coronal Origin of the Alfven Waves
- The Solar Helium Abundance in the Outer Corona Determined from Observations with SUMER/SOHO
- Limits on Alpha Particle Temperature Anisotropy and Differential Flow from Kinetic Instabilities: Solar Wind Observations
- Plasma Heating During a Coronal Mass Ejection Observed by SOHO
- On the Remote Detection of Suprathermal Ions in the Solar Corona and their Role as Seeds for Solar Energetic Particle Production
- The "FIP Effect" and the Origins of Solar Energetic Particles and of the Solar Wind
- Suppression of Dielectronic Recombination Due to Finite Density Effects
- Interchange Reconnection Alfven Wave Generation
- Ponderomotive Acceleration in Coronal Loops
- On the Origin of the Slow Speed Solar Wind: Helium Abundance Variations
- Plasma physical parameters along Coronal Mass Ejection-driven shocks: I observations
- Statistical Evidence for the Existence of Alfvénic Turbulence in Solar Coronal Loops
- Variations in solar wind fractionation as seen by ACE/SWICS over a solar cycle and the implications for Genesis Mission results
- Evidence of Twisting and Mixed-polarity Solar Photospheric Magnetic Field in Large Penumbral Jets: IRIS and Hinode Observations
- Determining the Elemental and Isotopic Composition of the preSolar Nebula from Genesis Data Analysis: The Case of Oxygen
- The Solar Flare Sulphur Abundance from RESIK Observations
- On excited frequencies for Alfvén waves in a coronal arcade
- Uncertainties in the solar photospheric oxygen abundance
- Polarized Balmer Line Emission from Supernova Remnant Shock Waves Efficiently Accelerating Cosmic Rays
- Discovery of polarized line emission in SN1006
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- The Solar Orbiter mission -- Science overview
- Waves in the lower solar atmosphere: the dawn of next-generation solar telescopes
- Relating streamer flows to density and magnetic structures at the Parker Solar Probe
- Four Distinct Pathways to the Element Abundances in Solar Energetic Particles
- Defining the Middle Corona
- The FIP and Inverse FIP Effects in Solar Flares
- Estimation of the physical parameters of a CME at high coronal heights using low frequency radio observations
- Alfvenic Perturbations in a Sunspot Chromosphere Linked to Fractionated Plasma in the Corona
- The source of the major solar energetic particle events from super active region 11944
- Sixty Years of Element Abundance Measurements in Solar Energetic Particles
- The Evolution of Plasma Composition During a Solar Flare
- The Effect of Solar Wind Expansion and Non-Equilibrium Ionization on the Broadening of Coronal Emission Lines
- Linking the Sun to the Heliosphere Using Composition Data and Modelling. A Test Case with a Coronal Jet
- Extending the FIP bias sample to magnetically active stars. Challenging the FIP bias paradigm?
- Coronal Elemental Abundance: New Results from Soft X-ray Spectroscopy of the Sun
- How Do Shock Waves Define the Space-Time Structure of Gradual Solar Energetic Particle Events?
- Distinguishing the Rigidity Dependences of Acceleration and Transport in Solar Energetic Particles
- Observation of Alfvén Wave Reflection in the Solar Chromosphere: Ponderomotive Force and First Ionization Potential Effect
- IRIS observations of the low-atmosphere counterparts of active region outflows
- Compositional metrics of fast and slow Alfvenic solar wind emerging from coronal holes and their boundaries
- Evidence for distinctive changes in the solar wind helium abundance in cycle 24
- Density And Velocity Fluctuations of Alpha Particles in Magnetic Switchbacks
- Coronal Densities, Temperatures and Abundances During the 2019 Total Solar Eclipse: The Role of Multi-Wavelength Observations in Coronal Plasma Characterization
- Spectropolarimetric Fluctuations in a Sunspot Chromosphere
- Plasma composition measurements in an active region from Solar Orbiter/SPICE and Hinode/EIS
- On the Correlation between Energy Spectra and Element Abundances in Solar Energetic Particles
- Multi-wavelength observations by XSM, Hinode and SDO of an active region. Chemical abundances and temperatures
- Solar Energetic Particles: Spatial Extent and Implications of the H and He Abundances
- A holistic approach to understand Helium enrichment in Interplanetary coronal mass ejections: New insights
- Magnetic Field Geometry and Composition Variation in Slow Solar Winds: The Case of Sulfur
- SPICE Connection Mosaics to link the Sun's surface and the heliosphere
- Excess H, Suppressed He, and the Abundances of Elements in Solar Energetic Particles
- Element Abundances of Solar Energetic Particles and the Photosphere, the Corona, and the Solar Wind
- Simulation of Thermal Nonequilibrium Cycles in the Solar Wind
- Element Abundances in Impulsive Solar Energetic Particle Events
- Dropouts of Fully Stripped Ions in the Solar Wind: A Diagnostic for Wave Heating versus Reconnection
- Coronal Abundance Fractionation Linked to Chromospheric Transverse MHD Waves in a Solar Active Region Observed with FISS/GST and EIS/Hinode
- Seeds and Sequences of Element Abundances in Solar Energetic Particle Events
- The solar sulphur abundance in view of large-scale atomic structure calculations and 3D non-LTE models
- Solar Particle Acceleration
- An elemental abundance diagnostic for coordinated Solar Orbiter/SPICE and Hinode/EIS observations
- CHIANTI -- an atomic database for emission lines -- Paper XVIII. Version 11, advanced ionization equilibrium models: density and charge transfer effects
- Sulfur fractionation in coronal plumes as observed by Solar Orbiter/SPICE
- The Dynamic Evolution of Solar Wind Streams Following Interchange Reconnection
- A Perspective on Solar Energetic Particles
- FIP Bias Evolution in an Emerging Active Region as observed in SPICE Synoptic Observations