THE CHEMICAL COMPOSITION OF THE ACTIVE STARS
Journal Title: Odessa Astronomical Publications - Year 2016, Vol 29, Issue
Abstract
The comparison of the results of the studies of the active stars’ chemical composition obtained by different authors has been performed. It was concluded that the difference between the abundances of some elements in active and inactive stars becomes significant (> 3σ) only for the active stars with high chromospheric activity (lgR’HK > -4). This is the case primarily for the light elements, namely Li, Na and Al, as well as heavy elements with Z > 30.
Authors and Affiliations
L. V. Glazunova
SPECIFICATION OF LIMITS OF POSSIBLE EXISTENCE OF SATELLITES IN THE GRAVITATIONAL FIELD OF PLANETS
It is known that the satellites of the planets may exist in the area, which is bounded on one side by Rocha limit, on the other – Hill sphere. The article deals with the determination of the Rocha limits and Hill sphere...
GRAVITATIONAL COLLAPSE OF STARS AND THE METHODS OF ITS OBSERVATIONS
It is present a review of the models of the later stages of stellar evolution and the mechanisms of the generation of neutrinos, charged particles and electromagnetic radiation during the gravitational collapse of stars....
DISCONNECTED REGIONS OF STABLE CIRCULAR ORBITS IN PRESENCE OF MASSIVE SCALAR FIELD
We study circular orbits around a static spherically symmetric configuration of General Relativity in presence of a nonlinear massive scalar field (SF). The problem deals with a family of solutions to Einstein – SF equatio...
OPTICAL MONITORING OF NGC4151 DURING 110 YEARS
We present the historical light curve of NGC 4151 for 1906–2016. The light curve (Oknyanskij and Lyuty, 2007) is primarily based on our published photoelectric data (1968–2007, about 1040 nightly mean measurements (Oknya...
Hα AND Hβ PROFILE VARIATIONS IN THE SPECTRA OF THE STAR 55 CYG
We study the variability of the Hα and Hβ lines in the spectra of 55 Cyg based on observations acquired in 2014 on the 2-m telescope of Shamakhy Astrophysical Observatory. In this work line profiles...