The Results of the Search for the Ultra-Rapid Flux Fluctuations of the Galactic Sources of the Water-Vapour Maser Emission at a Wavelength of 1.35 cm in 2002-2011статья
Дата последнего поиска статьи во внешних источниках: 29 мая 2015 г.
Аннотация:Results of a search for ultrarapid flux fluctuations of galactic sources of maser emission in the water-vapor line at a wavelength of 1.35 cm are reported. The observational technique of the search for rapid flux fluctuations on some minute scales has been developed. From 2002 to 2011 a number of observational sessions for 49 maser sources have been carried out with durations from 2 to 7 hours (with spectra exposures from 1 second to 20 minutes). For the most interesting sources two-three sessions with an interval of a day have been spent. Among them we have selected several sources that have shown such variability, including internal processes in the sources, in regions with characteristic scale of the order of 0.1 a.u., and external (up to theoretical possibility of the resonant influence of gravitational waves from galactic objects on the masering region). Possible causes of variability are discussed Fast fluctuations of spectra for 12 maser sources on timescales of tens of minutes and minutes (for the sources Cep A, GGD4, IRAS 16293-2422, Ori A, W3 (OH), W3 (2), W33B, W43M3, W44C, W49N, W75N, W75S) have been reliably detected. Some part of them is connected with linear polarization for some sources (Ori A, W3 (OH), W3 (2), W44C, W49N, W75S), which results in slow changes of the fluxes (tens of minutes) from the polarized spectral details during the diurnal motion of the sources in the sky. Anther type of variability is connected with fast motions of maser condensations in cosmic masers (Cep A, GGD4, IRAS 16293-2422, W33B, W43M3, W49N, W75N). The timescale of flux variatons of the second type of variability is from 10 minutes to about one hour.
