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SCIENTIFIC
RATIONALE
Spectroscopy
is a power tool for the analysis of radiation from different plasmas in
astronomy, laboratory, fusion research and industry.
The
investigation of nature of the emitting ionized gas in galactic nuclei is one of
important subjects
in astrophysics today. Investigating the
processes in the central parts of these objects, we can learn about the
innermost parts of other 'normal' galaxies. Moreover, AGN are the most powerful sources, located at different cosmological
time-scales, and their investigation is cosmologically important.
Additionally, a part of emission from these objects (e.g. in the X-rays) has its origin very close to a massive black
hole, and investigation of this emission can help us understand the physical
processes in a strong gravitational field.
On
the other side, a number of AGN are affected by gravitational lensing
effect. Studies aimed at
determining the influence of microlensing on spectra of lensed quasars (hereafter QSOs) ought to account for the complex structure of the QSO central
emitting region. Since the sizes of the emitting regions are
wavelength-dependent, microlensing by stars in a lens galaxy will lead to a
wavelength-dependent magnification.
Efficace
theoretical analyzis, synthezis and modelling of stellar spectra as well as
the spectra from other plasma sources, depends on atomic data and their
sources. In particular for the
modeling of stellar atmospheres and opacity calculations a large number of
atomic
data is needed, since we do not know a priori the chemical composition of a
stellar atmosphere. Consequently the development of databases with atomic
data and astroinformatics is important for stellar spectroscopy.
Investigation
of spectral line profiles is of significance for various research fields not
only in astrophysics, where, for example, by analysis of stellar line
profiles we can obtain effective temperature, chemical composition, surface
gravity and other data on the investigated star, but also for a number of
topics in physics and technology.
The
workshop is planned as an opportunity to consider above mentioned aspects of
spectroscopic research on plenary sessions and than to work on the special
mini-projects, which will result in common papers to be published in
international astronomical journals.
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