INTERRUPTED MASS-LOSS ON THE ASYMPTOTIC GIANT BRANCH

AA ZIJLSTRA*, C LOUP, LBFM WATERS, T DEJONG

*Corresponding author for this work

    Research output: Contribution to journalLetterAcademicpeer-review

    Abstract

    We show that mass loss on the AGB is not a continuous process. Episodes of low mass loss rate, already known for carbon stars, are found to occur in oxygen-rich stars as well, suggesting that they constitute a general phenomenon. We propose that the mass loss depends on the phase of the thermal pulse cycle. A plausible physical mechanism indicates that mass loss peaks during a thermal pulse, and slows down or is interrupted during the interpulse phase. Episodes of low mass loss may coincide with decrease or cessation of variability.

    Original languageEnglish
    Pages (from-to)L5-L8
    Number of pages4
    JournalAstronomy & astrophysics
    Volume265
    Issue number1
    Publication statusPublished - Nov-1992

    Keywords

    • INFRARED RADIATION
    • STARS, EVOLUTION OF
    • MASS LOSS
    • CARBON
    • LONG PERIOD VARIABLES
    • RICH CIRCUMSTELLAR ENVELOPES
    • CARBON STARS
    • OXYGEN-RICH
    • DUST SHELLS
    • EVOLUTION
    • EMISSION
    • MODELS

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