Special Seminars


"Annual CAMK conference"

(NCAC, Warsaw)

Presentations of scientific results achieved in 2012 by CAMK scientific staff

The conference will take place on 9-10 January 2013.


"Broadening Functions in Spectroscopy"

Sławomir Ruciński (University of Toronto)

The concept of Broadening Functions is described: The BF's are simple projections of stellar shapes or stellar positions in the radial velocity domain, as seen in the broadening or displacement of spectral lines. As such, they can be utilized for analysis of orbital motion, shape distortion or mutual eclipses of components in binary stars or for detection of spots or waves of non-radial oscillations on single stars. The natural broadening process can be described as a linear convolution which can be solved for the BF shape utilizing the Singular Value Decomposition technique which is particularly advantageous for the highly over-determined system of the linear equations describing the spectral line broadening (frequently with many linearly dependent equations). The talk is meant to be of use for students and/or practitioners of the spectral line analysis.

Lecture will be heald on April 19 (Friday), 2013, at 10:00 am, at NCAC lecture hall. Duration approx. 1,5 h. The lecture is open to the public.


"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.