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Slingshot prominence evolution for a solar-like star

Research output: Contribution to journalArticle

Author(s)

Carolina Villarreal D'Angelo, Moira Jardine, Colin P. Johnstone, Victor See

School/Research organisations

Abstract

Although the present-day Sun rotates too slowly to exhibit centrifugally supported ‘slingshot prominences’, at some time during its past it may have formed these clouds of cool gas and ejected them into the interplanetary medium. We determine the time period for this behaviour using a rotation evolution code to derive the properties of the formation and ejection of slingshot prominences during the lifetime of a star similar to our Sun. The mass, mass-loss rate, and rate of ejection of these prominences are calculated using the analytical expression derived in our previous work. We find that for stars with an initial rotation rate larger than 4.6Ω⊙⁠, about half of all solar mass stars, slingshot prominences will be present even after the star reaches the main-sequence phase. In a fast rotator, this means that prominences can form until the star reaches ∼800 Myr old. Our results also indicate that the mass and lifetime of this type of prominence have maximum values when the star reaches the zero-age main sequence at an age of ∼40 Myr for a solar mass star.
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Details

Original languageEnglish
Pages (from-to)1448-1453
JournalMonthly Notices of the Royal Astronomical Society
Volume485
Issue number1
Early online date21 Feb 2019
DOIs
Publication statusPublished - 1 May 2019

    Research areas

  • Stars: coronae, Stars: low-mass, Stars: magnetic field, Stars: evolution

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