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Stellar Evolution at Low Metallicity

Hirschi, Raphael ; Chiappini, Cristina ; Meynet, Georges ; Maeder, André ; Ekström, Sylvia

In: Proceedings of the International Astronomical Union, 2007, vol. 3, no. S250, p. 217-230

  • Hirschi et al....
  • Hirschi et al....
  • Raphael Hirschi....
  • When adding the yields of the fast-rotating Z = 10−8 models from Hirschi (2007) the fit is much improved....
  • These processes occur in rotating massive star models (Meynet & Maeder 2002; Hirschi 2007)....
  • Reipurth, p. 107 Hirschi, R. 2007, A&A, 461, 571 Hirschi, R., Meynet, G., & Maeder, A. 2004, A&A, 425, 649 Hirschi, R., Meynet, G., & Maeder, A. 2005, A&A, 443, 581 Hopkins, A....
  • Also similar conclusions can be obtained from different initial mass models (Meynet et al. 2006; Hirschi 2007)....
  • The spinstar scenario In the “spinstar scenario” (Meynet et al. 2006; Hirschi 2007; Meynet et al. 2009), the required mixing is induced by the instabilities triggered by axial rotation of stars....
  • S. et al. 2008, Nature, 451, 216 Chiappini, C., Ekstr¨m, S., Meynet, G. et al. 2008, A&A, 479, L9 o Chiappini, C., Hirschi, R., Meynet, G. et al. 2006, A&A, 449, L27 Decressin, T., Meynet, G., Charbonnel, C., Prantzos, N., & Ekstr¨m, S. 2007, A&A, 464, 1029 o Frebel, A., Collet, R., Eriksson, K., Christlieb, N., & Aoki, W. 2008, ApJ, 684, 588 Hirschi, R. 2007, A&A, 461, 571 Korn, A....
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Theoretical stellar ΔY/ΔO in the early Universe

Ekström, Sylvia ; Meynet, Georges ; Maeder, André ; Chiappini, Cristina ; Georgy, Cyril ; Hirschi, Raphael

In: Proceedings of the International Astronomical Union, 2009, vol. 5, no. S268, p. 447-452

  • The stellar models are described in Hirschi (2007) for Z = 10−8 and in Ekstr¨m et al. (2008) for Z = 0....
  • B. 2004, ARA&A 42, 79 Chiappini, C., Ekstr¨m, S., Meynet, G., Hirschi, R., Maeder, A., & Charbonnel, C. 2008, A&A o 479, L9 Chiappini, C., Hirschi, R., Meynet, G., Ekstr¨m, S., Maeder, A., & Matteucci, F. 2006, A&A o 449, L27 Ekstr¨m, S., Meynet, G., Chiappini, C., Hirschi, R., & Maeder, A. 2008, A&A 489, 685 o Heger, A., Fryer, C....
  • H. 2003, ApJ 591, 288 Hirschi, R. 2007, A&A 461, 571 Hirschi, R., Meynet, G., & Maeder, A. 2004, A&A 425, 649 Iocco, F., Mangano, G., Miele, G., Pisanti, O., & Serpico, P....
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Stellar Evolution in the Early Universe

Hirschi, Raphael ; Frischknecht, Urs ; Thielemann, F.-K ; Pignatari, Marco ; Chiappini, Cristina ; Ekström, Sylvia ; Meynet, Georges ; Maeder, André

In: Proceedings of the International Astronomical Union, 2008, vol. 4, no. S255, p. 297-304

  • University of Basel Library, on 30 May 2017 at 14:18:56, subject to the Cambridge Core terms of use, available at https:/www.cambridge.org/core/terms. https://doi.org/10.1017/S1743921308024976 298 Raphael Hirschi et al....
  • University of Basel Library, on 30 May 2017 at 14:18:56, subject to the Cambridge Core terms of use, available at https:/www.cambridge.org/core/terms. https://doi.org/10.1017/S1743921308024976 300 Raphael Hirschi et al....
  • University of Basel Library, on 30 May 2017 at 14:18:56, subject to the Cambridge Core terms of use, available at https:/www.cambridge.org/core/terms. https://doi.org/10.1017/S1743921308024976 302 Raphael Hirschi et al....
  • A second consequence is that, during the core He-burning phase, the surface of the star can be strongly enriched in CNO elements, increasing its surface metallicity by many orders of magnitudes (Meynet & Maeder 2002; Hirschi 2007)....
  • The material ejected in that way has been processed by both H- and He-burning processes (Meynet et al. 2006; Hirschi 2007)....
  • Primas, 297–302 c Hirschi, R. 2007, A&A, 461, 571 Honda, S., Aoki, W., Kajino, T., et al. 2004, ApJ, 607, 474 Ishimaru, Y., Wanajo, S., Aoki, W., & Ryan, S....
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Powerful explosions at Z : 0?

Ekström, Sylvia ; Meynet, Georges ; Hirschi, Raphael ; Maeder, André

In: Proceedings of the International Astronomical Union, 2008, vol. 4, no. S255, p. 194-198

  • Sylvia Ekstr¨m1 , Georges Meynet1 , Raphael Hirschi2 and o Andr´ Maeder1 e 1 Geneva Observatory, University of Geneva, Maillettes 51 - CH 1290 Sauverny, Switzerland 2 University of Keele, Keele, ST5 5BG, UK Abstract....
  • A 752, 570 Ekstr¨m, S., Meynet, G., Chiappini, C., Hirschi, R., and Maeder, A. 2008a, A&A (in press), o arXiv:0807.0573 Ekstr¨m, S., Meynet, G., and Maeder, A. 2008b, in IAU Symposium, Vol. 250 of IAU Symposium, o pp 209–216 Greif, T....
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Stellar evolution models at the Magellanic Cloud metallicities

Hirschi, Raphael ; Ekström, Sylvia ; Georgy, Cyril ; Meynet, Georges ; Maeder, André

In: Proceedings of the International Astronomical Union, 2008, vol. 4, no. S256, p. 337-342

  • Hirschi et al....
  • Hirschi et al....
  • Hirschi et al....
Consortium of Swiss Academic Libraries

Massive star evolution: from the early to the present day Universe

Meynet, Georges ; Ekström, Sylvia ; Georgy, Cyril ; Maeder, André ; Hirschi, Raphael

In: Proceedings of the International Astronomical Union, 2008, vol. 4, no. S252, p. 317-327

  • The dashed line includes the yields of fast rotating Z = 10−8 models from Hirschi (2007) at very low metallicity....
  • The fact that WO stars are preferentially found at low metallicity has been invoked to associate these stars to the progenitors of long soft GRBs (Hirschi et al 2005)....
  • Heger, A. & Langer, N. 2000, ApJ, 544, 1016 Hirschi, R. 2007, A&A, 461, 571 Hirschi, R., Meynet, G., & Maeder, A. 2004, A&A, 425, 649 Hirschi, R., Meynet, G., & Maeder, A. 2004, A&A, 443, 581 Huang, W. & Gies, D....
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  • Mar 11, 1968: Sion, Genève et Martigny ; les enfants de feu Auguste SixtUdry, à Genève ; les enfants de feu Louis Udry, à Barboleuse et Vétroz ; les enfants de feu Joseph-Marie Udry, à Vétroz et Berne ; Le Comité et les joueurs du Hockey-Club Sion ont le devpiir de faire part du décès de MONSIEUR t Gustave DEBONS pére et grand-pèire de leurs joueurs Jeain-Jaeques, Raphael , Claude et Jeam-Bernard Debons....
  • Feb 13, 1968: Fr. 5— 4.— 3.— 2— JEUNE FILLE cherche place comme I I L'Institut Saint-Raphael, à Champlan s....
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