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1. Armagh Observatory Preprint No. 306
... We present an analysis of an optical blue spectrum of the pulsating helium star V652 Her (=BD+13 3224$) in order to determine its effective temperature, surface gravity and chemical composition. ... The surface composition is characterised by abundances of nH=0.009, He=0.988, nC~0.000040, nN=0.0025 and nO=0.00010 (number fractions). ... If V652 Her was formed by the merger of two white dwarfs, its surface composition demands that they should both be helium white dwarfs. ...
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Ссылки http://star.arm.ac.uk/~csj/abstracts/v652her4.html -- 3.5 Кб -- 01.11.1999
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2. http://star.arm.ac.uk/ext_no.html
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Ссылки http://star.arm.ac.uk/ext_no.html -- 1.3 Кб -- 24.07.2012
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3. Appendix 11, Computer Exercises
... A 11.2 Exercise 2 (Horner's scheme and files) . ... A 11.5 Exercise 5 (Linear systems of equations and files) This Appendix with Computer Exercises is also available in Swedish The source of this appendix is my complete Fortran 90 tutorial in Swedish, L robok i Fortran 90 . These computer exercises are small variants of those used at the teaching of Fortran at Link ping University, both for the students of technology and for the students in the mathematics and science program. ...
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Ссылки http://star.arm.ac.uk/f77to90/a11.html -- 35.0 Кб -- 19.09.1996
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