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Stephen F. Austin State University

Faculty Publications

1991

Articles 1 - 2 of 2

Full-Text Articles in Physical Sciences and Mathematics

Simultaneous Light And Radial Velocity Curve Solutions For U Cephei, J. B. Rafert, N. L. Markworth Jan 1991

Simultaneous Light And Radial Velocity Curve Solutions For U Cephei, J. B. Rafert, N. L. Markworth

Faculty Publications

The light-curve synthesis approach of Wilson & Devinney has been used to solve simultaneously light and radial velocity curves of the Algol-type eclipsing binary star U Cephei. We have performed eight new differential corrections solutions using the photometric data of Markworth and the radial velocity data of Batten to obtain a consistent set of orbital and astrophysical parameters for the light and velocity curves of this famous system. We find U Cephei to be best modeled using the semidetached (mode 5) system geometry of the Wilson & Devinney program, with a primary rotating at about 5.2 times its synchronous rate, …

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X-Ray Study Of The Crystallization Processes In Amorphous (Zro. 64ni0. 36) 1-Xalx Alloys. [Abstract], W. D. Bruton, T. O. Callaway, Richard H. Langley, B. H. Zhang, D. G. Naugle Jan 1991

X-Ray Study Of The Crystallization Processes In Amorphous (Zro. 64ni0. 36) 1-Xalx Alloys. [Abstract], W. D. Bruton, T. O. Callaway, Richard H. Langley, B. H. Zhang, D. G. Naugle

Faculty Publications

The short range order in (Zr0.64Ni0.36)1−xAlx metallic glasses for values of x between 0 and 0.25 was investigated using X-ray diffraction. X-ray intensity patterns and the derived structural functions for the as-quenched samples differed only slightly with the change in aluminum concentration, suggesting that the addition of aluminum does not significantly alter the relative coordination of the zirconium and nickel atoms. Only the first two alloys in the series (x = 0, 0.05) exhibited multiple transitions in the DSC thermograms. The intermediate phase for the x = 0.05 alloy has an …

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