Astron. Astrophys. 347, 821-840 (1999)

Acknowledgements

E.G. acknowledges the hospitality of the Institute of Astronomy of National Central University, Chung-Li and the Academia Sinica Institute of Astronomy & Astrophysics, Taipei in Taiwan, where an early part of this work was carried out. We have benefited from helpful discussions with Tzihong Chiueh, Alexei M. Fridman, Muzafar N. Maksumov, Alexander G. Morozov, Valery L. Polyachenko, Shlomi Pistinner, and Alessandro Romeo. Several sharp criticisms that improved our understanding of the problems under consideration by Alar Toomre and Chi Yuan are also gratefully acknowledged. The idea to use local N-body experiments was suggested by Frank H. Shu, without whom, definitely, the present work would have never appeared. The authors are grateful to an anonymous referee of this paper for his/her useful comments on the original manuscript. It is our pleasure to thank William Peter and Der-Ming Wu for suggesting the improvement of the numerical calculations. All numerical simulation results have been obtained from the computers at the Institute of Astronomy of National Central University in Taiwan, and the Computer Center of Ben-Gurion University of the Negev and the Inter University Computation Center, Tel Aviv University in Israel. Partial financial support for this work was provided by the Israeli Ministry of Science, and the National Science Council and the Academia Sinica of Taiwan. One of us (E.G.) was supported by the Israeli Ministry of Immigrant Absorption in the framework of the program "Gilady."

© European Southern Observatory (ESO) 1999

Online publication: June 6, 1999
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