The solar proxy κ1 Cet and the planetary habitability around the young Sun. Issue Volume 12:Issue S328(2016) (12th September 2017)

• Record Type: Journal Article
• Authors: do Nascimento, J.-D.; Vidotto, A. A.; Petit, P.; Folsom, C.; de Mello, G. F. Porto; Meibom, S.; Abrevaya, X. C.; Ribas, I.; Castro, M.; Marsden, S. C.; Morin, J.; Jeffers, S. V.; Guinan, E.
• Editors: Nandy, D.; Valio, A.; Petit, P.
• Is Part Of: Proceedings of the International Astronomical Union. Volume 12:Issue S328(2016)
• Page Start: 338
• Page End: 349
• Publication Date: 2017-09-12
• Subjects: Kappa 1 Ceti, -- HD 20630, -- solar analog, -- magnetic field, -- winds, -- outflows, -- habitability; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921317004276
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: Among the solar proxies, κ 1 Cet, stands out as potentially having a mass very close to solar and a young age. We report magnetic field measurements and planetary habitability consequences around this star, a proxy of the young Sun when life arose on Earth. Magnetic strength was determined from spectropolarimetric observations and we reconstruct the large-scale surface magnetic field to derive the magnetic environment, stellar winds, and particle flux permeating the interplanetary medium around κ 1 Cet. Our results show a closer magnetosphere and mass-loss rate 50 times larger than the current solar wind mass-loss rate when Life arose on Earth, resulting in a larger interaction via space weather disturbances between the stellar wind and a hypothetical young-Earth analogue, potentially affecting the habitability. Interaction of the wind from the young Sun with the planetary ancient magnetic field may have affected the young Earth and its life conditions.