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We present a new set of stellar yields obtained from rotating stellar models at solar metallicity covering the massive star range (9-120 solar masses). The stellar models were calculated with the latest version of the Geneva stellar…

Astrophysics · Physics 2007-05-23 R. Hirschi , G. Meynet , A. Maeder

The Geneva evolutionary code has been modified to study the advanced stages (Ne, O, Si burnings) of rotating massive stars. Here we present the results of four 20 solar mass stars at solar metallicity with initial rotational velocities of…

Astrophysics · Physics 2015-06-24 Raphael Hirschi , Georges Meynet , Andre Maeder , Stephane Goriely

The effects of rotation on stellar evolution are particularly important at low metallicity, when mass loss by stellar winds diminishes and the surface enrichment due to rotational mixing becomes relatively more pronounced than at high…

We present a new set of stellar yields obtained from rotating stellar models at solar metallicity covering the massive star range (12-60 solar masses). The stellar models were calculated with the latest version of the Geneva stellar…

Astrophysics · Physics 2009-11-10 R. Hirschi , G. Meynet , A. Maeder

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…

The present paper discusses the main physical effects produced by stellar rotation on presupernovae, as well as observations which confirm these effects and their consequences for presupernova models. Rotation critically influences the mass…

Solar and Stellar Astrophysics · Physics 2018-04-25 Georges Meynet , Andre Maeder

We show that rotation strongly affects the nature of the supernova progenitor (blue/red supergiant or Wolf--Rayet star), and thus the supernova types. In particular our models well reproduce the variations of the number ratio SNIb/Ic to…

Astrophysics · Physics 2007-05-23 Georges Meynet , Raphael Hirschi , André Maeder

The evolution of rotating stars with zero-age main sequence (ZAMS) masses in the range 8 to 25 M_sun is followed through all stages of stable evolution. The initial angular momentum is chosen such that the star's equatorial rotational…

Astrophysics · Physics 2008-11-26 A. Heger , N. Langer , S. E. Woosley

As a massive star evolves through multiple stages of nuclear burning on its way to becoming a supernova, a complex, differentially rotating structure is set up. Angular momentum is transported by a variety of classic instabilities, and also…

Astrophysics · Physics 2009-11-10 A. Heger , S. E. Woosley , H. C. Spruit

We present the first set of a new generation of models of massive stars of solar composition extending between 13 and 120 \msun, computed with and without the effects of rotation. We included two instabilities induced by rotation, namely…

Solar and Stellar Astrophysics · Physics 2012-12-13 Alessandro Chieffi , Marco Limongi

Grids of models of massive stars ($M \ge$ 20 $M_\odot$) with rotation are computed for metallicities $Z$ ranging from that of the Small Magellanic Cloud (SMC) to that of the Galactic Centre. The hydrostatic effects of rotation, the…

Astrophysics · Physics 2009-11-10 G. Meynet , A. Maeder

Understanding the nature of the first stars is key to understanding the early universe. With new facilities such as JWST we may soon have the first observations of the earliest stellar populations, but to understand these observations we…

Grids of models for rotating stars are constructed in the range of 9 to 120 M$_{\odot}$ at solar metallicity. The following effects of rotation are included: shellular rotation, new structure equations for non-conservative case, surface…

Astrophysics · Physics 2008-11-26 Georges Meynet , Andre Maeder

The impact of new stellar evolution models with rotation on the predictions of population synthesis models is discussed. Massive rotating stars have larger convective cores than their non-rotating counterparts, and their outer layers are…

Solar and Stellar Astrophysics · Physics 2014-02-05 Claus Leitherer

We examine the properties of Wolf--Rayet (WR) stars predicted by models of rotating stars taking account of the new mass loss rates for O--type stars and WR stars (Vink et al. \cite{Vink00}, \cite{Vink01}; Nugis & Lamers \cite{NuLa00}) and…

Astrophysics · Physics 2009-11-07 G. Meynet , A. Maeder

We explore the variation in single star 15-30 $\rm{M}_{\odot}$, non-rotating, solar metallicity, pre-supernova MESA models due to changes in the number of isotopes in a fully-coupled nuclear reaction network and adjustments in the mass…

Solar and Stellar Astrophysics · Physics 2016-12-14 R. Farmer , C. E. Fields , I. Petermann , Luc Dessart , M. Cantiello , B. Paxton , F. X. Timmes

We investigate the evolution of the surface properties of models for rotating massive stars, i.e., their luminosities, effective temperatures, surface rotational velocities, and surface abundances of all isotopes, from the zero age main…

Astrophysics · Physics 2009-05-29 A. Heger , N. Langer

(Abridged) Rotation has been shown to play a determinant role at very low metallicity, bringing heavy mass loss where almost none was expected. Is this still true when the metallicity strictly equals zero? The aim of our study is to get an…

Astrophysics · Physics 2009-11-13 S. Ekström , G. Meynet , C. Chiappini , R. Hirschi , A. Maeder

We evolve stellar models to study the rotational profiles of the pre-explosion cores of single massive stars that are progenitors of core collapse supernovae (CCSNe), and find large rotational shear above the iron core that might play an…

Solar and Stellar Astrophysics · Physics 2017-11-17 Noa Zilberman , Avishai Gilkis , Noam Soker

We explore the effects of rotation on convective carbon, oxygen, and silicon shell burning during the late stages of evolution in a 20Msun star. Using the Modules for Experiments in Stellar Astrophysics (MESA) we construct 1D stellar models…

Solar and Stellar Astrophysics · Physics 2016-05-25 Emmanouil Chatzopoulos , Sean M. Couch , W. David Arnett , F. X. Timmes
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