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Since the 1970s symposia or colloquia devoted to recent research on
close binaries have been held around the world almost annually. At
meetings of the General Assembly of the International Astronomical
Union this topic has also been discussed in detail at presentations
in various commission meetings and also as invited talks by leading
astronomers in the field. In recent years, fundamental changes have
taken place in the study of close binaries due to the improvements
in observational techniques, extension of observations from X-ray
to radio regions of the electromagnetic spectrum, and advances in
theoretical studies. For more than a decade, a group of astronomers
at Ege University Observatory has been concentrating on active
close binaries with particular emphasis on the behaviour of the
light curves of chromospherically active systems. Thus, we decided
to organize an international meeting in Western Anatolia, where
this part of Turkey had been the cradle for great developments in
science during antiquity. KUljadasi, located only minutes away from
Ephesus, one of the seven wonders of the world, was selected to be
the meeting site. Close binary systems constitute a very rich
source of information about the physical properties of the
component stars. Some systems are eclipsing variables, where
periodic recurrences of eclipses are observed as comparatively
brief decreases in the total brightness of the binary system.
Precise methods of photometric observations make it possible to
obtain the light variations of these systems because of eclipses
and other phenomena.
Pulsating and eccentric binary stars play a fundamentally important
role in deciphering the mass distribution within stars. The present
volume reviews the fundamental concepts of both radial and
nonradial oscillations in the stars, including the Sun. Helio- and
astroseismological results are reviewed, from the basics to the
most recent developments. A new theory is presented, which seems to
explain the mechanism of the light and radial velocity variations
of recently discovered Ap stars. This textbook covers almost all
kinds of variable stars of widely different characteristics. It
will serve as a reference text for a very long time to come, not
only for specialists but also for undergraduate students of physics
and astronomy.
Pulsating and eccentric binary stars play a fundamentally important
role in deciphering the mass distribution within stars. The present
volume reviews the fundamental concepts of both radial and
nonradial oscillations in the stars, including the Sun. Helio- and
astroseismological results are reviewed, from the basics to the
most recent developments. A new theory is presented, which seems to
explain the mechanism of the light and radial velocity variations
of recently discovered Ap stars. This textbook covers almost all
kinds of variable stars of widely different characteristics. It
will serve as a reference text for a very long time to come, not
only for specialists but also for undergraduate students of physics
and astronomy.
Since the 1970s symposia or colloquia devoted to recent research on
close binaries have been held around the world almost annually. At
meetings of the General Assembly of the International Astronomical
Union this topic has also been discussed in detail at presentations
in various commission meetings and also as invited talks by leading
astronomers in the field. In recent years, fundamental changes have
taken place in the study of close binaries due to the improvements
in observational techniques, extension of observations from X-ray
to radio regions of the electromagnetic spectrum, and advances in
theoretical studies. For more than a decade, a group of astronomers
at Ege University Observatory has been concentrating on active
close binaries with particular emphasis on the behaviour of the
light curves of chromospherically active systems. Thus, we decided
to organize an international meeting in Western Anatolia, where
this part of Turkey had been the cradle for great developments in
science during antiquity. KUljadasi, located only minutes away from
Ephesus, one of the seven wonders of the world, was selected to be
the meeting site. Close binary systems constitute a very rich
source of information about the physical properties of the
component stars. Some systems are eclipsing variables, where
periodic recurrences of eclipses are observed as comparatively
brief decreases in the total brightness of the binary system.
Precise methods of photometric observations make it possible to
obtain the light variations of these systems because of eclipses
and other phenomena.
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