Then, once on the white dwarf cooling sequence the variable DB (DBV) and DA (DAV) white dwarfs offer two additional windows to study their structure and evolution. The white dwarf cooling sequence is an important tool to determine the age of stellar populations in various environments: solar ...
Final Stages of Stellar Evolution EQUATION OF STATE OF DENSE MATTER AND MAXIMUM MASS OF NEUTRON STARSHaensel, P
S Stars: Stellar EvolutionWe report the results of an ongoing survey of S stars within 1 kpc of the Sun for emission from the J = 1 → 0 and J = 2 → 1 lines of CO. We derive mass loss rates from the CO emission and compare with other estimates. We find that S stars are ...
The stellar evolution from the asymptotic giant branch (AGB) to planetary nebulae (PN) contains some of the most interesting physical and chemical processes in the Universe. Within a time period of one million years starting from the nucleosynthesis of carbon in the core, we witness the chemical...
We use our results to estimate the chemical composition of the circumstellar envelopes. Comparison is made with thermodynamic equilibrium models for the formation of these and other species under photospheric conditions. 展开 关键词: S Stars: Stellar Evolution ...
The late stages of stellar evolution are characterised by prodigious mass-loss, particularly on the Asymptotic Giant Branch (AGB), resulting in the build up of a circumstellar envelope of gas and dust. In this way, the majority of stars (» 0:8 M¯ < M < » 8 M¯) will have...
On the number of comets around white dwarf stars: orbit survival during the late stages of stellar evolution 来自 掌桥科研 喜欢 0 阅读量: 26 作者:J Parriott,C Alcock 摘要: The accretion of comets onto DA white dwarfs can produce observable metal absorption lines. We show here that comet ...
Learn about stellar evolution. From protostars to main sequence stars to red giants and finally to white dwarfs, neutron stars, supernovae, and black holes. Diagrams are used to plot their life cycle.
Binary stars are important for a full understanding of stellar evolution. We present a summary of how predictions of the relative supernova rates varies between single and binary stars. We also show how the parameter space of different supernova types differs between single and binary stars. We ...
Circumstellar Media in the Late Stages of Stellar Evolution: Circumstellar interaction in supernovae The observational evidence for circumstellar interaction from radio, optical, UV and X-rays are briefly summarized. The basic hydrodynamical and radiative ... C Fransson 被引量: 15发表: 1994年 Pola...