Discovery of multi-temperature coronal mass ejection signatures from a young solar analogue

Abstract

Coronal mass ejections (CMEs) on the early Sun may have profoundly influenced the planetary atmospheres of early Solar System planets. Flaring young solar analogues serve as excellent proxies for probing the plasma environment of the young Sun, yet their CMEs remain poorly understood. Here we report the detection of multi-wavelength Doppler shifts in Far-Ultraviolet (FUV) and optical lines during a flare on the young solar analog EK Draconis. During and before a Carrington-class ($\sim$10${}^{32}$ erg) flare, warm FUV lines ($\sim$10${}^5$ K) exhibit blueshifted emission at 300-550 km s${}^{-1}$, indicative of a warm eruption. 10 minutes later, the H$\alpha$ line shows slow (70 km s${}^{-1}$), long-lasting ($\gtrsim$2 hrs) blueshifted absorptions, suggesting a cool ($\sim$10${}^4$ K) filament eruption. This provides evidence of multi-temperature and multi-component nature of a stellar CME. If Carrington-class flares/CMEs occurred frequently on the young Sun, they may have cumulatively impacted the early Earth's magnetosphere and atmosphere.

36 pages, 3 figures, 8 extended data figures, published in Nature Astronomy (2025)

References in corpus (38)

• Global Energetics of Thirty-Eight Large Solar Eruptive Events
• Radiative Hydrodynamic Models of the Optical and Ultraviolet Emission from Solar Flares
• Time-Resolved Properties and Global Trends in dMe Flares from Simultaneous Photometry and Spectra
• Impact of Space Weather on Climate and Habitability of Terrestrial Type Exoplanets
• Can Superflares Occur on Our Sun?
• Velocity Characteristics of Evaporated Plasma Using Hinode/EIS
• Extreme solar events
• Suppression of Coronal Mass Ejections in active stars by an overlying large-scale magnetic field: A numerical study
• The MUSCLES Treasury Survey. V. FUV Flares on Active and Inactive M Dwarfs
• Probable detection of an eruptive filament from a superflare on a solar-type star
• 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
• Indications of stellar coronal mass ejections through coronal dimmings
• On the sizes of stellar X-ray coronae
• Solar ultraviolet bursts
• A stellar flare-coronal mass ejection event revealed by X-ray plasma motions
• The BOES spectropolarimeter for Zeeman measurements of stellar magnetic fields
• The Atmospheric Response to High Nonthermal Electron Beam Fluxes in Solar Flares I: Modeling the Brightest NUV Footpoints in the X1 Solar Flare of 2014 March 29
• New Insights into White-Light Flare Emission from Radiative-Hydrodynamic Modeling of a Chromospheric Condensation
• KOOLS--IFU: Kyoto Okayama Optical Low-dispersion Spectrograph with Optical-Fiber Integral Field Unit
• The fast filament eruption leading to the X-flare on March 29, 2014
• Magnetic fields on young, moderately rotating Sun-like stars II. EK Draconis (HD 129333)
• Sun-as-a-star spectroscopic observations of the line-of-sight velocity of a solar eruption on October 28, 2021
• Sun-as-a-star Analyses of Various Solar Active Events Using H$\alpha$ Spectral Images Taken by SMART/SDDI
• AU Microscopii in the FUV: Observations in Quiescence, During Flares, and Implications for AU Mic b and c
• Multiwavelength imaging and spectroscopy of chromospheric evaporation in an M-class solar flare
• APO & SMARTS flare star campaign observations I. Blue wing asymmetries in chromospheric lines during mid M dwarf flares from simultaneous spectroscopic and photometric observation data
• Discovery of a Long-Duration Superflare on a Young Solar-Type Star EK Draconis with Nearly Similar Time Evolution for H$\alpha$ and White-Light Emissions
• A Seven-Day Multi-Wavelength Flare Campaign on AU Mic I: High-Time Resolution Light Curves and the Thermal Empirical Neupert Effect
• Sun-as-a-star Analysis of H$\alpha$ Spectra of a Solar Flare Observed by SMART/SDDI: Time Evolution of Red Asymmetry and Line Broadening
• Characteristics that Produce White-Light Enhancements in Solar Flares Observed by Hinode/SOT
• A comparative study of two X2.2 and X9.3 solar flares observed with HARPS-N: Reconciling Sun-as-a-star spectroscopy and high-spatial resolution solar observations in the context of the solar-stellar connection
• Spectroscopic observations of a flare-related coronal jet
• Eruptions from coronal bright points: A spectroscopic view by IRIS of a mini-filament eruption, QSL reconnection, and reconnection-driven outflows
• Synthesizing Sun-as-a-star flare spectra from high-resolution solar observations
• Do Young Suns Produce Frequent, Massive CMEs? Results from Five-year Dedicated Optical Observations of EK Draconis and V889 Hercules
• Analysis of Solar-like X-Class Flare on Wolf 359 Observed Simultaneously with TESS and XMM-Newton
• Detecting Stellar Coronal Mass Ejections via Coronal Dimming in the Extreme Ultraviolet

Cited by in corpus (1)

• Do Young Suns Produce Frequent, Massive CMEs? Results from Five-year Dedicated Optical Observations of EK Draconis and V889 Hercules