Search for dissertations about: "AGB and post-AGB stars"

Showing result 1 - 5 of 6 swedish dissertations containing the words AGB and post-AGB stars.

  1. 1. A Study of Grain Drift in C Stars : Theoretical Modeling of Dust-Driven Winds in Carbon-Rich Pulsating Giant Stars

    Author : Christer Sandin; Susanne Höfner; Bengt Gustafsson; Lee Anne Willson; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Astronomy; hydrodynamics; radiative transfer; instabilities; dust formation; stars: AGB and post-AGB; stars: mass-loss; stars: variables: general; Astronomi; Astronomy and astrophysics; Astronomi och astrofysik; Theoretical Astrophysics; teoretisk astrofysik;

    Abstract : A major fraction of stars will pass through a short period of dramatic events in their final evolutionary stage. Low- to intermediate-mass stars, studied here, are stripped of their outer parts in a slow massive wind. This mass loss reshapes both the star and the surrounding medium. READ MORE

  2. 2. Studies of the S-type AGB star W Aquilae : The circumstellar envelope and the fain companion

    Author : Taissa Danilovich; Chalmers University of Technology; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; stars: binaries: spectroscopic; circumstellar matter; stars: binaries: visual; stars: evolution; stars: mass-loss; stars: AGB and post-AGB; stars: individual: W Aql;

    Abstract : Low- and intermediate-mass stars will all eventually enter the asymptotic giant branch (AGB) phase. AGB stars experience intense mass-loss, generating a significant fraction of the dust and molecular matter that enrichesthe ISM. AGB stars are also responsible for a the production of about half of all elements heavier than iron. READ MORE

  3. 3. Companion wind shaping in binaries involving an AGB star

    Author : Lam Doan; Sofia Ramstedt; Eric Lagadec; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; AGB and post-AGB stars; mass-loss; radio lines; binaries; wind shaping; Astronomy; Astronomi;

    Abstract : Stars of initial masses between 0.8-8 M☉ will become "asymptotic giant branch" (AGB) stars during the final stages of their evolution. During this phase, the stars are characterized by low velocity and high-density winds. READ MORE

  4. 4. Studies of late-type stars and massive star formation regions using masers

    Author : Jiyune Yi; Chalmers University of Technology; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; stars - stars: AGB and post-AGB; matter - techniques: interferometric; ISM: HII regions; circumstellar matter; molecules - masers - radio lines: ISM; formation; individual TX Camelopadalis ;

    Abstract : .... READ MORE

  5. 5. The circumstellar envelope of the S-type AGB star π1 Gruis

    Author : Doan Duc Lam; Kay Justtanont; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; AGB and post-AGB stars: mass-loss binaries: general - radio lines: stars - stars: general stars: individual: π1 Gru.; Astronomy; Astronomi;

    Abstract : .... READ MORE