masterThesis
Evolução da excentricidade dos sistemas binários com componente evoluída
Fecha
2010-12-27Registro en:
SIMÕES NETO, Flodoaldo de Lima. Evolução da excentricidade dos sistemas binários com componente evoluída. 2010. 71 f. Dissertação (Mestrado em Física da Matéria Condensada; Astrofísica e Cosmologia; Física da Ionosfera) - Universidade Federal do Rio Grande do Norte, Natal, 2010.
Autor
Simões Neto, Flodoaldo de Lima
Resumen
On this study we have revisited the predicted tidal circularization theory in close
binary systems with a evolved component. Close binaries suffer tidal interactions that
tend to synchronize periods and circularize the orbits (Zahn 1977, 1989, 1992). According
to Zahn s theory we compute the integral that give us the variation of the eccentricity in
a binary under the influence of tidal force and we compare the integral results with new
observations for 260 binary systems with orbital solutions. Our results confirm the success
of the Zahn s theory with a new data and new stellar evolutionary models, on the other
hand, our results points to the need for a better description of the role of convection on
this theory