The FIP and Inverse FIP Effects in Solar and Stellar Coronae

Abstract

We review our state of knowledge of coronal element abundance anomalies in the Sun and stars. We concentrate on the first ionization potential (FIP) effect observed in the solar corona and slow-speed wind, and in the coronae of solar-like dwarf stars, and the "inverse FIP" effect seen in the corona of stars of later spectral type; specifically M dwarfs. These effects relate to the enhancement or depletion, respectively, in coronal abundance with respect to photospheric values of elements with FIP below about 10~eV. They are interpreted in terms of the ponderomotive force due to the propagation and/or reflection of magnetohydrodynamic waves in the chromosphere. This acts on chromospheric ions, but not neutrals, and so can lead to ion-neutral fractionation. A detailed description of the model applied to closed magnetic loops, and to open field regions is given, accounting for the observed difference in solar FIP fractionation between the slow and fast wind. It is shown that such a model can also account for the observed depletion of helium in the solar wind. The helium depletion is sensitive to the chromospheric altitude where ion-neutral separation occurs, and the behavior of the helium abundance in the closed magnetic loop strongly suggests that the waves have a coronal origin. This, and other similar inferences may be expected to have a strong bearing on theories of solar coronal heating. Chromospheric waves originating from below as acoustic waves mode convert, mainly to fast mode waves, can also give rise to ion-neutral separation. Depending on the geometry of the magnetic field, this can result in FIP or Inverse FIP effects. We argue that such configurations are more likely to occur in later-type stars (known to have stronger field in any case), and that this explains the occurrence of the Inverse FIP effect in M dwarfs.

Review paper submitted to Living Reviews in Solar Physics. 74 pages. Some material revised and updated from astro-ph/0405230, arXiv:0901.3350, arXiv:1110.4357

References in corpus (145)

• The chemical composition of the Sun
• Atomic Data for Astrophysics. II. New Analytic Fits for Photoionization Cross Sections of Atoms and Ions
• Kepler Mission Design, Realized Photometric Performance, and Early Science
• The 'Forbidden' Abundance of Oxygen in the Sun
• 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
• Line formation in solar granulation: IV. [O I], OI and OH lines and the photospheric O abundance
• Magnetic fields of non-degenerate stars
• New solar opacities, abundances, helioseismology, and neutrino fluxes
• 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
• A Reappraisal of the Solar Photospheric C/O Ratio
• Heating of the Solar Chromosphere and Corona by Alfven Wave Turbulence
• Coronal Holes
• Impulsive phase flare energy transport by large-scale Alfven waves and the electron acceleration problem
• New Solar Composition: The Problem With Solar Models Revisited
• S4N: A Spectroscopic Survey of Stars in the Solar Neighborhood
• An Ab Initio Approach to the Solar Coronal Heating Problem
• The On/Off Nature of Star-Planet Interactions
• Constraining solar abundances using helioseismology
• The elemental composition of the Sun II. The iron group elements Sc to Ni
• The photospheric solar oxygen project: I. Abundance analysis of atomic lines and influence of atmospheric models
• Solar System Abundances of the Elements
• Line formation in solar granulation VI. [C I], C I, CH and C2 lines and the photospheric C abundance
• Dynamic Hydrogen Ionization
• Resolving the Xi Boo Binary with Chandra, and Revealing the Spectral Type Dependence of the Coronal "FIP Effect"
• A new approach to analyzing solar coronal spectra and updated collisional ionization equilibrium calculations. II. Additional ionization rate coefficients
• Solar-like oscillations in alpha Centauri B
• Solar models with accretion. I. Application to the solar abundance problem
• Evidence for Magnetic Flux Saturation in Rapidly Rotating M Stars
• The elemental composition of the Sun I. The intermediate mass elements Na to Ca
• Accurate fundamental parameters for 23 bright solar-type stars
• A Unified Picture of the FIP and Inverse FIP Effects
• The elemental composition of the Sun III. The heavy elements Cu to Th
• The "Solar Model Problem" Solved by the Abundance of Neon in Stars of the Local Cosmos
• Nonlinear Dynamics of the Parker Scenario for Coronal Heating
• Giant Chromospheric Anemone Jet Observed with Hinode and Comparison with Magnetohydrodynamic Simulations: Evidence of Propagating Alfven Waves and Magnetic Reconnection
• Coronal Evolution of the Sun in Time: High-Resolution X-Ray Spectroscopy of Solar Analogs with Different Ages
• Establishing a Connection Between Active Region Outflows and the Solar Wind: Abundance Measurements with EIS/Hinode
• Amplitudes of solar-like oscillations: a new scaling relation
• Oscillation frequencies and mode lifetimes in alpha Centauri A
• What Is The Neon Abundance Of The Sun?
• Observing coronal nanoflares in active region moss
• Coronal Heating, Weak MHD Turbulence and Scaling Laws
• Numerical simulations of conversion to Alfven waves in sunspots
• Non-WKB Models of the FIP Effect: Implications for Solar Coronal Heating and the Coronal Helium and Neon Abundances
• Three Dimensional MHD Wave Propagation and Conversion to Alfven Waves near the Solar Surface. I. Direct Numerical Solution
• The solar photospheric nitrogen abundance. Analysis of atomic transitions with 3D and 1D model atmospheres
• Constraints on the Heating of High Temperature Active Region Loops: Observations from Hinode and SDO
• Ultra-high-precision velocity measurements of oscillations in alpha Cen A
• The discrepancy between solar abundances and helioseismology
• High-resolution X-ray spectroscopy of Procyon by Chandra and XMM-Newton
• On the opacity change required to compensate for the revised solar composition
• Intermittent heating in the solar corona employing a 3D MHD model
• The Unresolved Fine Structure Resolved - IRIS observations of the Solar Transition Region
• X-Ray Spectroscopy of II Pegasi: Coronal Temperature Structure, Abundances, and Variability
• Asymmetries of solar coronal extreme ultraviolet emission lines
• Multi-Thread Hydrodynamic Modeling of a Solar Flare
• Stellar coronal astronomy - a review
• The chemical composition of the Sun from helioseismic and solar neutrino data
• MOST detects variability on tau Bootis possibly induced by its planetary companion
• Exploring mass loss, low-Z accretion, and convective overshoot in solar models to mitigate the solar abundance problem
• A multi-site campaign to measure solar-like oscillations in Procyon. II. Mode frequencies
• X-rays from T Tau: A test case for accreting T Tauri stars
• Three years in the coronal life of AB Dor. I. Plasma emission measure distributions and abundances at different activity levels
• The solar photospheric abundance of carbon.Analysis of atomic carbon lines with the CO5BOLD solar model
• Chromospheric magnetic field and density structure measurements using hard X-rays in a flaring coronal loop
• The Coronae of AR Lac
• The Ne/O abundance ratio in the quiet Sun
• Element Abundances in Solar Energetic Particles and the Solar Corona
• Non-WKB Models of the FIP Effect: The Role of Slow Mode Waves
• Plasma composition in a sigmoidal anemone active region
• Current Sheets Formation in Tangled Coronal Magnetic Fields
• Energy flux of Alfven waves in weakly ionized plasma
• Measurements of Absolute Abundances in Solar Flares
• The Alpha Centauri Binary System: Atmospheric Parameters and Element Abundances
• Line formation in solar granulation: I. Fe line shapes, shifts and asymmetries
• Wave Propagation and Jet Formation in the Chromosphere
• Detailed and simplified non-equilibrium helium ionization in the solar atmosphere
• Coronal versus photospheric abundances of stars with different activity levels
• The Solar Helium Abundance in the Outer Corona Determined from Observations with SUMER/SOHO
• Gas-dynamic shock heating of post-flare loops due to retraction following localized, impulsive reconnection
• Generation of Alfven Waves by Magnetic Reconnection
• Quantization rule solution to the Hulthén potential in arbitrary dimension by a new approximate scheme for the centrifugal term
• Another forbidden solar oxygen abundance: the [O I] 5577 A line
• Evidence of Shock-Driven Turbulence in the Solar Chromosphere
• PHOENIX model chromospheres of mid- to late-type M dwarfs
• Non-equilibrium calcium ionisation in the solar atmosphere
• The coronal source of extreme-ultraviolet line profile asymmetries in solar active region outflows
• Suppression of Dielectronic Recombination Due to Finite Density Effects
• Turbulent Coronal Heating Mechanisms: Coupling of Dynamics and Thermodynamics
• Possible Quasi-Periodic Oscillations from Unstable Accretion: 3D MHD Simulations
• RHESSI Observations of the Solar Flare Iron-line Feature at 6.7 keV
• Seismic study of the chemical composition of the solar convection zone
• Analysis of 70 Ophiuchi AB including seismic constraints
• Are Chromospheric Nanoflares a Primary Source of Coronal Plasma?
• Model-Free Multi-Probe Lensing Reconstruction of Cluster Mass Profiles
• The X-ray spectra of the flaring and quiescent states of AT Microscopii observed by XMM-Newton
• The Coronal Abundance Anomalies of M Dwarfs
• The element abundance FIP effect in the quiet Sun
• A Low Solar Oxygen Abundance from the First Overtone OH Lines
• Asteroseismology of the visual binary 70 Ophiuchi
• Coronal Emission Measures and Abundances for Moderately Active K Dwarfs Observed by Chandra
• The effects of strong temperature anisotropy on the kinetic structure of collisionless slow shocks and reconnection exhausts. Part I: PIC simulations
• Coronal properties of the EQ Peg binary system
• On the Origin of the Slow Speed Solar Wind: Helium Abundance Variations
• Solar abundance problem
• The effects of strong temperature anisotropy on the kinetic structure of collisionless slow shocks and reconnection exhausts. Part II: Theory
• Stellar Coronae, Solar Flares: a Detailed Comparison of sigma Gem, HR 1099, and the Sun in High-resolution X-rays
• Solar Flare Composition and Thermodynamics from RESIK X-ray Spectra
• Element abundances in X-ray emitting plasmas in stars
• Onset of Fast Magnetic Reconnection in Partially Ionized Gases
• Statistically-derived flaring chromospheric-coronal density structure from non-thermal X-ray observations of the Sun
• On Collisionless Electron-Ion Temperature Equilibration in the Fast Solar Wind
• The energy of waves in the photosphere and lower chromosphere: IV. Inversion results of Ca II H spectra
• Spectroscopic analysis of a super-hot giant flare observed on Algol by BeppoSAX on 30 August 1997
• Chemical Fractionation and Abundances in Coronal Plasma
• Line formation in solar granulation: III. The photospheric Si and meteoritic Fe abundances
• The hard X-ray perspective on the soft X-ray excess
• The Solar Flare Chlorine Abundance from RESIK X-ray Spectra
• Highly Ionized Potassium Lines in Solar X-ray Spectra and the Abundance of Potassium
• Asteroseismology of Procyon with SOPHIE
• Core and Wing Densities of Asymmetric Coronal Spectral Profiles: Implications for the Mass Supply of the Solar Corona
• Modelling the chromosphere and transition region of Epsilon Eri (K2 V)
• Identification of Variable Stars in COROT's First Main Observing Field (LRc1)
• The Solar Flare Sulphur Abundance from RESIK Observations
• The corona and upper transition region of epsilon Eridani
• The Coronal Abundances of Mid-F Dwarfs
• Photospheric and coronal abundances in solar-type stars: the peculiar case of Tau Bootis
• Self-Organization of Reconnecting Plasmas to Marginal Collisionality in the Solar Corona
• Seismology of Procyon A: determination of mode frequencies, amplitudes, lifetimes, and granulation noise
• A solar spectroscopic absolute abundance of argon from RESIK
• The coronal Ne/O abundance of alpha Centauri
• Chromospheric changes in K stars with activity
• Excitation and damping of p-mode oscillations of alpha Cen B
• Planetary influence on the young Sun's evolution: the solar neutrino probe
• Silicon abundance from RESIK solar flare observations
• The solar abundance problem: the effect of the turbulent kinetic flux on the solar envelope model
• Line formation in solar granulation: II. The photospheric Fe abundance
• Acceleration of Type 2 Spicules in the Solar Chromosphere - 2: Viscous Braking and Upper Bounds on Coronal Energy Input
• Highly Ionized Sodium X-ray Line Emission from the Solar Corona and the Abundance of Sodium
• Ponderomotive modification of multicomponent magnetospheric plasma due to electromagnetic ion cyclotron waves
• Modeling $\epsilon$ Eridani and asteroseismic tests of element diffusion
• Pointwise almost h-semi-slant submanifolds
• XMM-Newton Probes the Solar Past: Coronal Abundances of Solar Analogs at Different Ages

Cited by in corpus (155)

• The Solar Orbiter mission -- Science overview
• The chemical make-up of the Sun: A 2020 vision
• The multi-scale nature of the solar wind
• Solar UV and X-Ray Spectral Diagnostics
• Partially Ionized Plasmas in Astrophysics
• The Properties of the Solar Corona and Its Connection to the Solar Wind
• Spectroscopic Observations of Current Sheet Formation and Evolution
• Kink oscillations of coronal loops
• The Stellar CME-flare relation: What do historic observations reveal?
• The Soft State of Cygnus X-1 Observed with NuSTAR: A Variable Corona and a Stable Inner Disk
• Solar structure and evolution
• Critical Science Plan for the Daniel K. Inouye Solar Telescope (DKIST)
• Element Abundances: A New Diagnostic for the Solar Wind
• Probing the physics of the solar atmosphere with the Multi-slit Solar Explorer (MUSE): I. Coronal Heating
• Alfvénic Wave Heating of the Upper Chromosphere in Flares
• Waves in the lower solar atmosphere: the dawn of next-generation solar telescopes
• Solar coronal lines in the visible and infrared. A rough guide
• On-disc Observations of Flux Rope Formation Prior to its Eruption
• Solar Wind Charge Exchange: An Astrophysical Nuisance
• The First Ionization Potential Effect from the Ponderomotive Force: On the Polarization and Coronal Origin of the Alfven Waves
• Space Plasma Physics: A Review
• Abundances, Ionization States, Temperatures, and FIP in Solar Energetic Particles
• Dynamics of Coronal-Hole Boundaries
• Four Distinct Pathways to the Element Abundances in Solar Energetic Particles
• Density diagnostics derived from the OIV and SIV intercombination lines observed by IRIS
• Non-equilibrium helium ionization in an MHD simulation of the solar atmosphere
• The Instruments and Capabilities of the Miniature X-ray Solar Spectrometer (MinXSS) CubeSats
• A Chandra/LETGS Survey of Main Sequence Stars
• 3D non-LTE line formation of neutral carbon in the Sun
• The "FIP Effect" and the Origins of Solar Energetic Particles and of the Solar Wind
• Solar models with convective overshoot, the solar-wind mass loss, and a PMS disk accretion: helioseismic quantities, Li depletion and neutrino fluxes
• Reconstructing the Extreme Ultraviolet Emission of Cool Dwarfs Using Differential Emission Measure Polynomials
• New Solar Irradiance Measurements from the Miniature X-Ray Solar Spectrometer CubeSat
• The relative emission from chromospheres and coronae: dependence on spectral type and age
• Detection of a giant flare displaying quasi-periodic pulsations from a pre-main sequence M star with NGTS
• Helium Variation Across Two Solar Cycles Reveals A Speed-Dependent Phase Lag
• Transient Inverse-FIP Plasma Composition Evolution within a Confined Solar Flare
• The Gaia-ESO Survey: A new approach to chemically characterising young open clusters II. Abundances of the neutron-capture elements Cu, Sr, Y, Zr, Ba, La, and Ce
• A Solar cycle correlation of coronal element abundances in Sun-as-a-star observations
• A Hydrodynamic Model of Alfvénic Wave Heating in a Coronal Loop and its Chromospheric Footpoints
• Solar X-ray Monitor On Board the Chandrayaan-2 Orbiter: In-flight Performance and Science Prospects
• MOVES III. Simultaneous X-ray and ultraviolet observations unveiling the variable environment of the hot Jupiter HD 189733b
• The FIP and Inverse FIP Effects in Solar Flares
• The Origin of Solar Filament Plasma Inferred from in situ Observations of Elemental Abundances
• Coronal Elemental Abundances in Solar Emerging Flux Regions
• Charge States and FIP Bias of the Solar Wind from Coronal Holes, Active Regions, and Quiet Sun
• Ponderomotive Acceleration in Coronal Loops
• Alfvenic Perturbations in a Sunspot Chromosphere Linked to Fractionated Plasma in the Corona
• Inverse FIP Effects in Giant Solar Flares Found from Earth X-Ray Albedo with Suzaku/XIS
• The source of the major solar energetic particle events from super active region 11944
• Helium abundance and speed difference between helium ions and protons in the solar wind from coronal holes, active regions, and quiet Sun
• New solar metallicity measurements
• Multi-wavelength variability of the young solar analog iota Hor. X-ray cycle, star spots, flares, and UV emission
• Implications of solar wind measurements for solar models and composition
• Nonlinear evolution of short-wavelength torsional Alfven waves
• Electron Beams Cannot Directly Produce Coronal Rain
• The EUV spectrum of the Sun: quiet and active Sun irradiances and chemical composition
• Sixty Years of Element Abundance Measurements in Solar Energetic Particles
• Transition Region Abundance Measurements During Impulsive Heating Events
• The Evolution of Plasma Composition During a Solar Flare
• The drivers of active region outflows into the slow solar wind
• The Abundance of Helium in the Source Plasma of Solar Energetic Particles
• Linking the Sun to the Heliosphere Using Composition Data and Modelling. A Test Case with a Coronal Jet
• Directly comparing coronal and solar wind elemental fractionation
• Can Sub-photospheric Magnetic Reconnection Change the Elemental Composition in the Solar Corona?
• The impact of multi-fluid effects in the solar chromosphere on the ponderomotive force under LTE and NEQ ionization conditions
• Coronal Elemental Abundances during A-class Solar Flares Observed by Chandrayaan-2 XSM
• Sources of The Slow Solar wind During the Solar Cycle 23/24 Minimum
• Extending the FIP bias sample to magnetically active stars. Challenging the FIP bias paradigm?
• Hydrogen and the Abundances of Elements in Impulsive Solar Energetic-Particle Events
• Single ICMEs and Complex Transient Structures in the Solar wind in 2010 -- 2011
• Coronal Elemental Abundance: New Results from Soft X-ray Spectroscopy of the Sun
• Determining the Elemental and Isotopic Composition of the preSolar Nebula from Genesis Data Analysis: The Case of Oxygen
• Observations of the Quiet Sun During the Deepest Solar Minimum of the Past Century with Chandrayaan-2 XSM -- Elemental Abundances in the Quiescent Corona
• Soft X-Ray Observations of Quiescent Solar Active Regions using Novel Dual-zone Aperture X-ray Solar Spectrometer (DAXSS)
• Hydrogen and the Abundances of Elements in Gradual Solar Energetic-Particle Events
• Optical dimming of RW Aur associated with an iron rich corona and exceptionally high absorbing column density
• Sunquake Generation by Coronal Magnetic Restructuring
• Predicting the COSIE-C Signal from the Outer Corona up to 3 Solar Radii
• Distinguishing the Rigidity Dependences of Acceleration and Transport in Solar Energetic Particles
• Solar Wind Helium Abundance Heralds Solar Cycle Onset
• The Factory and the Beehive. IV. A Comprehensive Study of the Rotation X-ray Activity Relation in Praesepe and the Hyades
• Observation of Alfvén Wave Reflection in the Solar Chromosphere: Ponderomotive Force and First Ionization Potential Effect
• Swift and XMM-Newton observations of an RS CVn type eclipsing binary SZ Psc: Superflare and coronal properties
• The First Flight of the Marshall Grazing Incidence X-ray Spectrometer (MaGIXS)
• Helium Suppression in Impulsive Solar Energetic-Particle Events
• IRIS observations of the low-atmosphere counterparts of active region outflows
• A diagnostic of coronal elemental behavior during the inverse FIP effect in solar flares
• Evidence for distinctive changes in the solar wind helium abundance in cycle 24
• Compositional metrics of fast and slow Alfvenic solar wind emerging from coronal holes and their boundaries
• Solar Cycle Dependence of ICME Composition
• The shared evaporation history of three sub-Neptunes spanning the radius-period valley of a Hyades star
• First Results for Solar Soft X-ray Irradiance Measurements from the Third Generation Miniature X-Ray Solar Spectrometer
• Characteristics and applications of interplanetary coronal mass ejection composition
• Understanding the Relationship between Solar Coronal Abundances and F10.7 cm Radio Emission
• Gyroresonance and free-free radio emissions from multi-thermal multi-component plasma
• Coronal Densities, Temperatures and Abundances During the 2019 Total Solar Eclipse: The Role of Multi-Wavelength Observations in Coronal Plasma Characterization
• What determines active region coronal plasma composition?
• The high helium abundance and charge states of the interplanetary CME and its material source on the Sun
• Elemental composition in quiescent prominences
• Spectropolarimetric Fluctuations in a Sunspot Chromosphere
• Plasma composition measurements in an active region from Solar Orbiter/SPICE and Hinode/EIS
• On the Origin of Magnetic Pertubations associated with the FIP effect
• Gas absorption and dust extinction towards the Orion Nebula Cluster
• High-resolution wave dynamics in the lower solar atmosphere
• New insights into the first two PSP solar encounters enabled by modeling analysis with ADAPT-WSA
• The Solar Minimum Eclipse of 2019 July 2. III. Inferring the Coronal $T_e$ with a Radiative Differential Emission Measure Inversion
• Multi-wavelength observations by XSM, Hinode and SDO of an active region. Chemical abundances and temperatures
• Cross Helicity and the Helium Abundance as an in situ Metric of Solar Wind Acceleration
• Evolution of Plasma Composition in an Eruptive Flux Rope
• Comparison of Helium Abundance between ICMEs and Solar Wind near 1 AU
• Pointing Chandra Toward the Extreme Ultraviolet Fluxes of Very Low-Mass Stars
• Corotating Shock Waves and the Solar-Wind Source of Energetic Ion Abundances: Power Laws in A/Q
• Coronal Abundances in an Active Region: Evolution and Underlying Chromospheric and Transition Region Properties
• A holistic approach to understand Helium enrichment in Interplanetary coronal mass ejections: New insights
• Solar Energetic Particles: Spatial Extent and Implications of the H and He Abundances
• Excess H, Suppressed He, and the Abundances of Elements in Solar Energetic Particles
• Scattered light in the Hinode/EIS and SDO/AIA instruments measured from the 2012 Venus transit
• Reflection of fast magnetosonic waves near magnetic reconnection region
• Magnetic Field Geometry and Composition Variation in Slow Solar Winds: The Case of Sulfur
• Assessing the capability of a model-based stellar XUV estimation
• Energy Spectra vs. Element Abundances in Solar Energetic Particles and the Roles of Magnetic Reconnection and Shock Acceleration
• On the transition from Slow to Fast Wind as Observed in Composition Observations
• Element Abundances of Solar Energetic Particles and the Photosphere, the Corona, and the Solar Wind
• Ponderomotive forces in unmagnetized plasmas described by Kappa distribution functions
• Solar Cycle Variation of 0.3-1.29 MeV/nucleon Heavy Ion Composition during Quiet Times near 1 AU in Solar Cycles 23 and 24
• Spatiotemporal Low FIP Abundance: A Catalyst for Coronal Condensation
• Element Abundances in Impulsive Solar Energetic Particle Events
• Spectropolarimetric investigation of magnetohydrodynamic wave modes in the photosphere: First results from PHI on board Solar Orbiter
• The Evolution of Heavy Ion Abundances with Solar Activity
• Signature and escape of highly fractionated plasma in an active region
• X-ray Activity Variations and Coronal Abundances of the Star-Planet Interaction candidate HD 179949
• Seeds and Sequences of Element Abundances in Solar Energetic Particle Events
• Helium Abundance Periods Observed by the Solar Probe Cup on Parker Solar Probe: Encounters 1-14
• Measurement of stellar and substellar winds using white dwarf hosts
• The Transition Region of Solar Flare Loops
• Composition Comparison between ICMEs from Active Regions and Quiet-Sun Regions
• Solar Particle Acceleration
• XRISM view of a stellar flare: High-resolution Fe K spectra of HR 1099, an RS CVn-type star
• Differential abundance analysis of Procyon and Theta Sculptoris: Comparison with abundance patterns of solar-like pairs
• A new view of the solar interface region from the Interface Region Imaging Spectrograph (IRIS)
• Helium Abundance of the Sun: A Spectroscopic Analysis
• Spectropolarimetric synthesis of forbidden lines in MHD models of coronal bright points
• Coronal heating problem solution by means of axion origin photons
• CHIANTI -- an atomic database for emission lines -- Paper XVIII. Version 11, advanced ionization equilibrium models: density and charge transfer effects
• Earth-affecting Solar Transients: A Review of Progresses in Solar Cycle 24
• Large-scale magnetic fields and anomalies of chemical composition of stellar coronae
• The Inhomogeneity of Composition along the Magnetic Cloud Axis
• Evolution of Elemental Abundances During B-Class Solar Flares: Soft X-ray Spectral Measurements with Chandrayaan-2 XSM
• Deriving photospheric parameters and elemental abundances for a sample of stars showing the FIP effect
• Thermomagnetic Ettingshausen-Nernst effect in tachocline, magnetic reconnection phenomenon in lower layers, axion mechanism of solar luminosity variations, coronal heating problem solution and mechanism of ADM variations around BH
• Measuring relative abundances in the solar corona with optimised linear combinations of spectral lines
• FIP Bias Evolution in an Emerging Active Region as observed in SPICE Synoptic Observations
• Detection of stellar-like abundance anomalies in the slow solar wind
• Sulfur fractionation in coronal plumes as observed by Solar Orbiter/SPICE