Zobrazeno 1 - 10
of 509
pro vyhledávání: '"Georgy, Cyril"'
Autor:
Rizzuti, Federico, Hirschi, Raphael, Varma, Vishnu, Arnett, William David, Georgy, Cyril, Meakin, Casey, Mocák, Miroslav, Murphy, Alexander St. John, Rauscher, Thomas
One-dimensional (1D) stellar evolution models are widely used across various astrophysical fields, however they are still dominated by important uncertainties that deeply affect their predictive power. Among those, the merging of independent convecti
Externí odkaz:
http://arxiv.org/abs/2407.15544
Autor:
Sibony, Yves, Shepherd, Kendall G., Yusof, Norhasliza, Hirschi, Raphael, Chambers, Caitlan, Tsiatsiou, Sophie, Nandal, Devesh, Sciarini, Luca, Moyano, Facundo D., Bétrisey, Jérôme, Buldgen, Gaël, Georgy, Cyril, Ekström, Sylvia, Eggenberger, Patrick, Meynet, Georges
Grids of stellar evolution models with rotation using the Geneva stellar evolution code (Genec) have been published for a wide range of metallicities. We introduce the last remaining grid of Genec models, with a metallicity of $Z=10^{-5}$. We study t
Externí odkaz:
http://arxiv.org/abs/2407.06739
Autor:
Nandal, Devesh, Meynet, Georges, Ekström, Sylvia, Moyano, Facundo D., Eggenberger, Patrick, Choplin, Arthur, Georgy, Cyril, Farrell, Eoin, Maeder, Andre
The physics of stellar rotation plays a crucial role in the evolution of stars, their final fate and the properties of compact remnants. Diverse approaches have been adopted to incorporate the effects of rotation in stellar evolution models. This stu
Externí odkaz:
http://arxiv.org/abs/2312.13340
Publikováno v:
A&A 680, A101 (2023)
We study the differences between models computed with Ledoux and Schwarzschild criteria on the internal structure, evolutionary track in the Hertzsprung-Russell diagram (HRD), lifetimes, evolution of the surface abundances and velocities, and masses
Externí odkaz:
http://arxiv.org/abs/2310.18139
Mass-loss in red supergiants (RSGs) is generally recognized to be episodic, but mass-loss prescriptions fail to reflect this. Evolutionary models show that the total amount of mass lost during this phase determines if these stars evolve to warmer tem
Externí odkaz:
http://arxiv.org/abs/2211.14147
Autor:
Kamann, Sebastian, Saracino, Sara, Bastian, Nate, Gossage, Seth, Usher, Christopher, Baade, Dietrich, Cabrera-Ziri, Ivan, de Mink, Selma E., Ekström, Sylvia, Georgy, Cyril, Hilker, Michael, Larsen, Søren S., Mackey, Dougal, Niederhofer, Florian, Platais, Imants, Yong, David
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 518, Issue 1, January 2023, Pages 1505-1521
Young star clusters enable us to study the effects of stellar rotation on an ensemble of stars of the same age and across a wide range in stellar mass and are therefore ideal targets for understanding the consequences of rotation on stellar evolution
Externí odkaz:
http://arxiv.org/abs/2211.00693
Autor:
Long, Gang, Song, Hanfeng, Meynet, Georges, Maeder, Andre, Zhang, Ruiyu, Qin, Ying, Ekströmt, Sylvia, Georgy, Cyril, Zhao, Liuyan
Type IIb supernovae are believed to originate from core-collapse progenitors having kept only a very thin hydrogen envelope. We aim to explore how some physical factors, such as rotation, metallicity, overshooting, and the initial orbital period in b
Externí odkaz:
http://arxiv.org/abs/2208.11329
Autor:
Eggenberger, Patrick, Ekström, Sylvia, Georgy, Cyril, Martinet, Sébastien, Pezzotti, Camilla, Nandal, Devesh, Meynet, Georges, Buldgen, Gaël, Salmon, Sébastien, Haemmerlé, Lionel, Maeder, André, Hirschi, Raphael, Yusof, Norhasliza, Groh, José, Farrell, Eoin, Murphy, Laura, Choplin, Arthur
Publikováno v:
2021, A&A 652, A137
Context: Grids of stellar models, computed with the same physical ingredients, allow one to study the impact of a given physics on a broad range of initial conditions and are a key ingredient for modeling the evolution of galaxies. Aims: We present a
Externí odkaz:
http://arxiv.org/abs/2201.12262
Autor:
Yusof, Norhasliza, Hirschi, Raphael, Eggenberger, Patrick, Ekström, Sylvia, Georgy, Cyril, Sibony, Yves, Crowther, Paul A., Meynet, Georges, Kassim, Hasan Abu, Harun, Wan Aishah Wan, Maeder, André, Groh, Jose H., Farrell, Eoin, Murphy, Laura
We present a grid of stellar models at super-solar metallicity (Z = 0.020) extending the previous grids of Geneva models at solar and sub-solar metallicities. A metallicity of Z = 0.020 was chosen to match that of the inner Galactic disk. A modest in
Externí odkaz:
http://arxiv.org/abs/2201.08645
Autor:
Peng, Weiguo, Song, Hanfeng, Meynet, Georges, Maeder, Andre, Barblan, Fabio, Zhang, Ruiyu, Ekströmt, Sylvia, Georgy, Cyril, Long, Gang, Zhao, Liuyan, Qin, Ying
The observed late-type WC Wolf-Rayet stars (WC7-9) with low luminosity below $\rm \log L/L_{\odot} < 5.4$ in the HR diagram cannot be reproduced satisfactorily by the evolutionary track of single stars. The mass transfer due to Roche lobe overflow dr
Externí odkaz:
http://arxiv.org/abs/2111.13305