Coronal mass ejections and type II radio emission variability during a magnetic cycle on the solar-type star $\epsilon$ Eridani

Abstract

We simulate possible stellar coronal mass ejection (CME) scenarios over the magnetic cycle of $\epsilon$ Eridani (18 Eridani; HD 22049). We use three separate epochs from 2008, 2011, and 2013, and estimate the radio emission frequencies associated with these events. These stellar eruptions have proven to be elusive, although a promising approach to detect and characterise these phenomena are low-frequency radio observations of potential type II bursts as CME induced shocks propagate through the stellar corona. Stellar type II radio bursts are expected to emit below 450 MHz, similarly to their solar counterparts. We show that the length of time these events remain above the ionospheric cutoff is not necessarily dependent on the stellar magnetic cycle, but more on the eruption location relative to the stellar magnetic field. We find that these type II bursts would remain within the frequency range of LOFAR for a maximum of 20-30 minutes post-eruption for the polar CMEs, (50 minutes for 2nd harmonics). We find evidence of slower equatorial CMEs, which result in slightly longer observable windows for the 2008 and 2013 simulations. Stellar magnetic geometry and strength has a significant effect on the detectability of these events. We place the CMEs in the context of the stellar mass-loss rate (27-48 $\times$ solar mass-loss rate), showing that they can amount to 3-50% of the stellar wind mass-loss rate for $\epsilon$ Eridani. Continuous monitoring of likely stellar CME candidates with low-frequency radio telescopes will be required to detect these transient events.

17 pages, 11 figures. Accepted for publication in ApJ

References in corpus (61)

• Array Programming with NumPy
• Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics
• Ages for illustrative field stars using gyrochronology: viability, limitations and errors
• Magnetic fields of non-degenerate stars
• Alfven Wave Solar Model (AWSoM): Coronal Heating
• The Effect of a Strong Stellar Flare on the Atmospheric Chemistry of an Earth-like Planet Orbiting an M dwarf
• A dust ring around Epsilon Eridani: analogue to the young Solar System
• Gaia FGK Benchmark Stars: Effective temperatures and surface gravities
• Evidence for a Long-period Planet Orbiting Epsilon Eridani
• EUV Flare Activity in Late-Type Stars
• Incorporating Kinetic Physics into a Two-Fluid Solar-Wind Model with Temperature Anisotropy and Low-Frequency Alfven-Wave Turbulence
• Coherent Emission Mechanisms in Astrophysical Plasmas
• MHD Waves and Coronal Heating: Unifying Empirical and MHD Turbulence Models
• PolarBase: a data base of high resolution spectropolarimetric stellar observations
• Suppression of Coronal Mass Ejections in active stars by an overlying large-scale magnetic field: A numerical study
• Connecting Flares and Transient Mass Loss Events in Magnetically Active Stars
• Implications of mass and energy loss due to coronal mass ejections on magnetically-active stars
• Mass loss in pre-main sequence stars via coronal mass ejections and implications for angular momentum loss
• The Stellar CME-flare relation: What do historic observations reveal?
• A stellar flare-coronal mass ejection event revealed by X-ray plasma motions
• The quest for stellar coronal mass ejections in late-type stars: I. Investigating Balmer-line asymmetries of single stars in Virtual Observatory data
• Solar Flares and Coronal Mass Ejections: A Statistically Determined Flare Flux-CME Mass Correlation
• Extended MHD modeling of the steady solar corona and the solar wind
• The Threatening Environment of the TRAPPIST-1 Planets
• The formation heights of coronal shocks from 2D density and Alfvén speed maps
• Anisotropic Radio-Wave Scattering and the Interpretation of Solar Radio Emission Observations
• Magnetic Activity Cycles in the Exoplanet Host Star epsilon Eridani
• Stellar Coronal Mass Ejections I. Estimating occurrence frequencies and mass-loss rates
• Shock location and CME 3D reconstruction of a solar type II radio burst with LOFAR
• Planet-induced radio emission from the coronae of M dwarfs: the case of Prox Cen and AU Mic
• Constraining Stellar Coronal Mass Ejections Through Multi-Wavelength Analysis of the Active M Dwarf EQ Peg
• GMRT Low Frequency Observations of Extrasolar Planetary Systems
• Deep exploration of $\epsilon$ Eridani with Keck Ms-band vortex coronagraphy and radial velocities: mass and orbital parameters of the giant exoplanet
• CME-driven Shock and Type II Solar Radio Burst Band Splitting
• Mass Loss Rates from Coronal Mass Ejections: A Predictive Theoretical Model for Solar-Type Stars
• The Northern Arc of $\epsilon$ Eridani's Debris Ring as Seen by ALMA
• The impact of coronal mass ejections and flares on the atmosphere of the hot Jupiter HD189733b
• An X-ray activity cycle on the young solar-like star $\epsilon \mathrm{Eridani}$
• The Epsilon Eridani System Resolved by Millimeter Interferometry
• A census of Coronal Mass Ejections on solar-like stars
• A comprehensive examination of the Eps Eri system -- Verification of a 4 micron narrow-band high-contrast imaging approach for planet searches
• Deep LMT/AzTEC millimeter observations of Epsilon Eridani and its surroundings
• Tuning the Exo-Space Weather Radio for Stellar Coronal Mass Ejections
• Multi-instrumental view of magnetic fields and activity of $\epsilon$ Eridani with SPIRou, NARVAL, and TESS
• Evolution of the Alfvén Mach number associated with a coronal mass ejection shock
• Radio Emission from the Exoplanetary System $\epsilon$ Eridani
• The solar wind from a stellar perspective: how do low-resolution data impact the determination of wind properties?
• The Solar Wind in Time II: 3D stellar wind structure and radio emission
• Moving solar radio bursts and their association with coronal mass ejections
• Coronal Mass Ejections As a Mechanism for Producing IR Variability in Debris Disks
• Sub-second time evolution of Type III solar radio burst sources at fundamental and harmonic frequencies
• Implications of Recent Stellar Wind Measurements
• MAMBO image of the debris disk around epsilon Eridani : robustness of the azimuthal structure
• Lambda And: A post-main sequence wind from a solar-mass star
• Stopping Frequency of Type III Solar Radio Bursts in Expanding Magnetic Flux Tubes
• The Effect of Magnetic Variability on Stellar Angular Momentum Loss II: The Sun, 61 Cygni A, $\epsilon$ Eridani, $\xi$ Bootis A and $\tau$ Bootis A
• Breezing through the space environment of Barnard's Star b
• Magnetic field measurements of $\epsilon$ Eridani from Zeeman broadening
• Detection of 2$-$4 GHz Continuum Emission from $\epsilon$ Eridani
• Possible detection of gamma rays from Epsilon Eridani
• High-Energy Photon and Particle Effects onExoplanet Atmospheres and Habitability

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