Sökning: "AGB stars"
Visar resultat 1 - 5 av 21 avhandlingar innehållade orden AGB stars.
1. Charting Circumstellar Chemistry of Carbon-rich AGB Stars
Sammanfattning : Stars of low to intermediate initial masses (0.8 - 8 M⊙) enter the asymptotic giant branch (AGB) phase during their late evolution. LÄS MER
2. Molecules and Dust around AGB stars : Mass-loss rates and molecular abundances
Sammanfattning : All stars with a stellar mass of about 0.8–8 MSun will end their lives as asymptotic giant branch (AGB) stars. Through their extensive mass loss the AGB stars constitutes an important source of nuclear processed material. LÄS MER
3. Studies of the S-type AGB star W Aquilae : The circumstellar envelope and the fain companion
Sammanfattning : 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. LÄS MER
4. The circumstellar medium of AGB stars : a study of scattered stellar light and molecular radio line emission
Sammanfattning : .... LÄS MER
5. Stellar Winds of Cool Giants : Investigating the Mass-Loss Mechanism of AGB Stars
Sammanfattning : Asymptotic giant branch (AGB) stars are luminous cool giants of low to intermediate mass that are strongly pulsating and non-spherical, with heavy mass loss through a stellar wind. The mass loss makes these stars important for galactic chemistry, as the wind enriches the interstellar medium with new elements and dust, and it determines the final fate of these stars. LÄS MER