Special Seminars



"Origin of compact objects in X-ray binaries"

Jonay Isai Gonzalez Hernandez (Instituto de Astrofísica de Canarias, Spain)

I will present a review of my research in the field of X-ray binaries from the point of view of companion stars of compact objects and the information we can extract from the detail analysis of high-resolution optical spectra of these companion stars. The main point is that companion/secondary star is close enough to the compact object to be able to capture some of the matter ejected from the primary star in different phases of its faster evolution, namely common envelope phase and supernova explosion. Therefore, we try to search for signatures of chemical anomalies that could have been imprinted on secondary stars during the evolution of X-ray binaries, with the aim of obtaining information on the progenitor of these compact objects. I will then give a brief summary of what we have done so far and our latest results on this field. Finally, the high-resolution spectroscopy allows us to investigate the orbital period evolution in these X-ray binary systems. I will also show our latest results on this topic.

Lecture Hall, 11:15 am.