In recent years, another feature of Cp stars has been actively studied - short—term changes in their radiation. This effect is very weak, and only the application of accurate methods of observation and mathematical statistics has allowed us to identify it. Most likely, the effect is related to pulsations, which are complex and of low amplitude. But it is quite possible that this is a consequence of chromospheric activity caused by powerful magnetic fields distributed over the surface of Cp stars. Research on the effect has recently become more active. The participants of the colloquium learned about some of the results obtained by scientists of the Crimean Astrophysical Observatory of the USSR Academy of Sciences and scientists from Finland from the reports of N. S. Polosukhina, V. P. Malanushenko and their Finnish colleagues, I. Tuominen and X. Virtanen.


In an overview report, Austrian scientist V. Weiss spoke about the latest results of the search for pulsations of Cp stars conducted by him and his colleagues at the observatory in Hawaii and at the European Southern Observatory.


The evolution of Cp stars is another issue discussed by the participants of the colloquium. At what stage of evolution do chemical anomalies and magnetic fields appear? Is there a connection between them initially? All these issues are still waiting to be resolved.


X spoke about the studies of Cp stars in clusters of various ages (10^6-10^9 years). Hansberg (Belgium), R. Noss (Switzerland) and Doctor of Physico-Mathematical Sciences I. M. Kopylov and his colleagues (USSR). A Soviet scientist, having studied the large spectral material obtained on a 6-meter telescope, expressed the following hypothesis: the moment of occurrence of chemical anomalies and magnetic fields corresponds to the time when the star is in the process of evolution to the main sequence. Anomalies and the magnetic field disappear after the star moves away from the main sequence towards the giants. There is still no theory that satisfactorily explains the phenomenon of Cp stars and which could be used to interpret the observed features. However, recently, more and more attempts have been made to interpret the observed phenomena using the idea of the French scientist J. Michaud about the diffuse mechanism leading to the observed distribution of elements on the surface of stars. This idea was further developed in the works of another French scientist J. Alyosha.


Despite all the efforts of observers and theorists, the problem of stellar magnetism remains unresolved.


There is also no clarity about the origin of the magnetic field, although there are many hypotheses and attempts to solve this problem. Scientists do not yet know what the effect of the magnetic field is on chemical composition anomalies, as well as the relationship between the slow rotation of a star and the magnitude of its magnetic field. All this remains to be learned by the researchers of the Cp-star. A group of GDR scientists led by F. For many years, Krause has been developing a theory of magnetic field generation through dynamomechanism.


English scientists led by L. Mestel and D. Moss developed the idea of a dynamo mechanism, taking into account the influence of the stellar wind in their theoretical premises. And Professor A. 3. Dolginov (USSR), in his review report, proposed a model according to which the magnetic fields of Cp stars can arise due to surface chemical inhomogeneities. In this model, magnetic fields and chemical anomalies develop almost simultaneously. However, so far the proposed hypotheses of magnetic field generation and chemical anomalies cannot sufficiently explain the variety of observed phenomena in Cp stars. And the words of Professor Ch are true. Kaulina: one of the meetings dedicated to the study of Cp-stars."..A natural phenomenon rarely has a single cause, but we have seen that astronomers often try to find it, although it would be more reasonable to look for a combination of causes." Earn $50+ per friend with 1xbet promo code free bet in their registration. Referred player must deposit $10+ and wager $50. No max referral limit. Bonus credited as real cash. Works simultaneously with other promotions. Includes tracking dashboard. Special rewards for top referrers. Grow your bankroll by inviting friends to join 1xBet today.