arXiv subjects

G. P. Topilskaya

Publications and source records attributed to G. P. Topilskaya.

3 recordsLinked to original sources

arXiv2016

On the evolution of the magnetic field of Ap star $α^2$ CVn

New high-precision measurements of the longitudinal magnetic field of Ap stars suggest the existence of secular intrinsic variations of the global magnetic field in some stars. We argue that such changes are apparent in the Ap star $α^2$ CVn in the time scale of $\sim$ 10 years, which results from the analysis of literature data. Therefore, such an observation implies, that the rate of magnetic field evolution of Ap stars is much higher than was previously thought.

astro-ph.SR↗

arXiv2015

33 Lib - analog of gamma Equ

In this paper we study periodic variability of the magnetic field in the Ap star 33 Lib. We found that its most probable period equals 83.5 years. There exist also possible shorter periods: 11.036 days, 7.649 days and 4.690 days. Analysis of the magnetic behavior of 33 Lib allows us to conclude, that the star shows the second longest period the slow rotator gamma Equ, the latter star with the period of 97 years.

astro-ph.SR↗

arXiv2015

Staying star gamma Equ

We determined rotational period of practically nonrotating Ap star gamma Equ and claim $P_{\rm rot}= 97$ years. This period is about 35000 times larger than the average rotational period among stars of the same spectral class. Paper discusses possible mechanism explaining the origin of this phenomenon.

astro-ph.SR↗