Zobrazeno 1 - 10
of 48
pro vyhledávání: '"Lau, Herbert. H. B."'
We explore the final fates of massive intermediate-mass stars by computing detailed stellar models from the zero age main sequence until near the end of the thermally pulsing phase. These super-AGB and massive AGB star models are in the mass range be
Externí odkaz:
http://arxiv.org/abs/1410.5431
Publikováno v:
A&A 570, A125 (2014)
We use our new population synthesis code BONNFIRES to test how surface abundances predicted by rotating stellar models depend on the numerical treatment of rotational mixing, such as spatial resolution, temporal resolution and computation of mean mol
Externí odkaz:
http://arxiv.org/abs/1409.0229
Autor:
Schneider, Fabian R. N., Langer, Norbert, de Koter, Alex, Brott, Ines, Izzard, Robert G., Lau, Herbert H. B.
Publikováno v:
A&A 570, A66 (2014)
Powerful telescopes equipped with multi-fibre or integral field spectrographs combined with detailed models of stellar atmospheres and automated fitting techniques allow for the analysis of large number of stars. These datasets contain a wealth of in
Externí odkaz:
http://arxiv.org/abs/1408.3409
The very bright red star HV2112 in the Small Magellanic Cloud could be a massive Thorne-Zytkow Object, a supergiant-like star with a degenerate neutron core. With its luminosity of over $10^5\,\rm L_\odot$, it could also be a super asymptotic giant b
Externí odkaz:
http://arxiv.org/abs/1406.6064
Autor:
Doherty, Carolyn L., Gil-Pons, Pilar, Lau, Herbert H. B., Lattanzio, John C., Siess, Lionel, Campbell, Simon W.
We present a new grid of stellar models and nucleosynthetic yields for super-AGB stars with metallicities Z=0.001 and 0.0001, applicable for use within galactic chemical evolution models. Contrary to more metal rich stars where hot bottom burning is
Externí odkaz:
http://arxiv.org/abs/1403.5054
BONNFIRES, a new generation of population synthesis code, can calculate nuclear reaction, various mixing processes and binary interaction in a timely fashion. We use this new population synthesis code to study the interplay between binary mass transf
Externí odkaz:
http://arxiv.org/abs/1310.7503
We have computed detailed evolution and nucleosynthesis models for super and massive AGB stars over the mass range 6.5-9.0 Msun in divisions of 0.5 Msun with metallicities Z=0.02, 0.008 and 0.004. These calculations, in which we find third dredge-up
Externí odkaz:
http://arxiv.org/abs/1310.2614
Certain carbon-enhanced metal-poor stars likely obtained their composition via pollution from some of the earliest generations of asymptotic giant branch stars and as such provide important clues to early Universe nucleosynthesis. Recently, Kinman et
Externí odkaz:
http://arxiv.org/abs/1307.4762
The literature is rich in analysis and results related to thermally pulsing-asymptotic giant branch (TP-AGB) stars, but the problem of the instabilities that arise and cause the divergence of models during the late stages of their evolution is rarely
Externí odkaz:
http://arxiv.org/abs/1204.3931
V605 Aquilae is today widely assumed to have been the result of a final helium shell flash occurring on a single post-asymptotic giant branch star. The fact that the outbursting star is in the middle of an old planetary nebula and that the ejecta ass
Externí odkaz:
http://arxiv.org/abs/1009.3138