6 research outputs found
Confirmation of a Faraday Rotation Measure Anomaly in Cygnus
We confirm the reality of a reversal of the sign of the Faraday Rotation
Measure in the Galactic plane in Cygnus (Lazio et al, 1990), possibly
associated with the Cygnus OB1 association. The rotation measure changes by
several hundred rad/m over an angular scale of . We show that
a simple model of an expanding plasma shell with an enhanced density and
magnetic field, consistent with observations of H emission in this part
of sky, and physically associated with a superbubble of the Cygnus OB1
association, can account for the magnitude and angular scale of this feature.Comment: Submitted to the Astrophysical Journa
Searches for the Shell Swept up by the Stellar Wind from Cyg OB2
We investigated the kinematics of ionized gas in an extended (20 degrees by
15 degrees) region containing the X-ray Superbubble in Cygnus with the aim of
finding the shell swept up by a strong wind from Cyg OB2. H-alpha observations
were carried out with high angular and spectral resolutions using a Fabry-Perot
interferometer attached to the 125-cm telescope at the Crimean Observatory of
the Sternberg Astronomical Institute. We detected high-velocity gas motions,
which could result from the expansion of the hypothetical shell at a velocity
of 25-50 km/s. Given the number of OB stars increased by Knoedlseder (2000) by
an order of magnitude, Cyg OB2 is shown to possess a wind that is strong enough
[Lw ~= (1-2)x10^39 erg/s] to produce a shell comparable in size to the X-ray
Superbubble and to a giant system of optical filaments. Based on our
measurements and on X-ray and infrared observations, we discuss possible
observational manifestations of the shell swept up by the wind.Comment: 14 pages, Astronomy Letter
Studying of demographic ageing in Central and Eastern European countries
Демографическое развитие и социально-демографические риски регионов и стран в условиях глобализацииВ статье выделены основные этапы изучения демографического старения в странах Центральной и Восточной Европы, исследованы подходы ученых этих стран к изучению проблемы старения населения = Main stages of the study of demographic ageing in Central and Eastern Europe are identified in the article, approaches of scientists of these countries to study the aging population are analyze
Studying of demographic ageing in Central and Eastern European countries
Демографическое развитие и социально-демографические риски регионов и стран в условиях глобализацииВ статье выделены основные этапы изучения демографического старения в странах Центральной и Восточной Европы, исследованы подходы ученых этих стран к изучению проблемы старения населения = Main stages of the study of demographic ageing in Central and Eastern Europe are identified in the article, approaches of scientists of these countries to study the aging population are analyze