Discovery of multi-temperature coronal mass ejection signatures from a young solar analogue
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| Main Authors: | , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866915576597708800 |
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| author | Namekata, Kosuke France, Kevin Chae, Jongchul Airapetian, Vladimir S. Kowalski, Adam Notsu, Yuta Young, Peter R. Honda, Satoshi Kang, Soosang Kang, Juhyung Lee, Kyeore Maehara, Hiroyuki Lee, Kyoung-Sun Tamburri, Cole Ohshima, Tomohito Takayama, Masaki Shibata, Kazunari |
| author_facet | Namekata, Kosuke France, Kevin Chae, Jongchul Airapetian, Vladimir S. Kowalski, Adam Notsu, Yuta Young, Peter R. Honda, Satoshi Kang, Soosang Kang, Juhyung Lee, Kyeore Maehara, Hiroyuki Lee, Kyoung-Sun Tamburri, Cole Ohshima, Tomohito Takayama, Masaki Shibata, Kazunari |
| contents | 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$α$ 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_22110 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Discovery of multi-temperature coronal mass ejection signatures from a young solar analogue Namekata, Kosuke France, Kevin Chae, Jongchul Airapetian, Vladimir S. Kowalski, Adam Notsu, Yuta Young, Peter R. Honda, Satoshi Kang, Soosang Kang, Juhyung Lee, Kyeore Maehara, Hiroyuki Lee, Kyoung-Sun Tamburri, Cole Ohshima, Tomohito Takayama, Masaki Shibata, Kazunari Solar and Stellar Astrophysics Earth and Planetary Astrophysics High Energy Astrophysical Phenomena 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$α$ 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. |
| title | Discovery of multi-temperature coronal mass ejection signatures from a young solar analogue |
| topic | Solar and Stellar Astrophysics Earth and Planetary Astrophysics High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2510.22110 |