Download e-book for iPad: Close Binaries in the 21st Century: New Opportunities and by Alvaro Gimenez, Edward Guinan, Panagiotis Niarchos, Slavek

By Alvaro Gimenez, Edward Guinan, Panagiotis Niarchos, Slavek Rucinski

ISBN-10: 1402050267

ISBN-13: 9781402050268

ISBN-10: 1402050275

ISBN-13: 9781402050275

This booklet is the lawsuits of a world convention entitled "Close Binaries within the twenty first Century: New possibilities and Challenges", held in Syros island, Greece, June 27-30, 2005. The papers gathered during this quantity aspect the most recent achievements within the box and replicate the state-of-the-art of the dynamically evolving quarter of binary big name learn.

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Standart deviation of our analysis was also given in the table. During the O-C analysis we adopted the result from the light curve analysis for the orbital inclination (i). We checked the effect of the published error of i on the apsidal motion parameters, but could not find any such effect probably because of the very small error. The O-C residuals for all times of minimum with respect to the linear light elements are shown in Fig. 1. The full and dashed lines in the figure represent the predictions for primary and secondary minima, respectively.

We used the Wilson-Devinney (WD) method (Wilson and Devinney, 1971) in the analysis. For analysing the light curve, firstly we adopted the spectral type of primary component as B5 from Cesco and Sahade (1945). According Astrophys Space Sci (2006) 304:27–31 29 Table 2 Apsidal motion and third body parameters of HS Her Table 3 The results of the simultaneous UBV solution obtained by the WD method. 0004 HS HERCULIS Fig. 1 O-C diagram of HS Her. 9M corresponds to B5 stars. 307 for the mass ratio of the system.

The analysis results for the third body orbit were given in Table 1. 0010M . 022 M . 014. For magnetic activity cycle we used the amplitude and period of the cyclic variation and calculated the concerning parameters with Applegate (1992)’s formulation as in Table 1 assuming that the primary component is the active one. 1 rd Springer Astrophys Space Sci (2006) 304:33–35 3. Conclusions An O–C analysis for V839 Oph based on all available eclipse timings together with newly determined ones is presented.

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Close Binaries in the 21st Century: New Opportunities and Challenges (Astrophysics and Space Science,) by Alvaro Gimenez, Edward Guinan, Panagiotis Niarchos, Slavek Rucinski


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