Abstract

The long-term stability of the PSR B1257+12 system has been demonstrated by Gozdziewski, Konacki and Wolszczan (2005) by means of 1 Gyr direct integrations. Their result gives a strong prediction about the future of the system, but to determine its past remains still an open problem. In this paper we investigate possible scenarios leading to the presently observed characteristics of the system. The central feature of our study is an intriguing configuration close to the 3:2 resonance of the two bigger planets with masses 4.3 and 3.9 Earth masses respectively. The orbital migration of the planets at the early phases of the evolution plays an important role in the successful reconstruction of the dynamics of this system.

Presentation

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