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Orbits of the visual binaries ADS 8814 and ADS 8065 from observations along a short arc
Kiselev, A. A.; Romanenko, L. G.; Kiyaeva, O. V. +1 more
The orbits of the visual binaries ADS 8814 and ADS 8065 are determined for the first time. The orbits were calculated using the parameters of the apparent motion, based on position observations along short arcs obtained on the 26-inch refrector of the Pulkovo Observatory, supplemented with radial-velocity observations for the stellar components in…
Dark energy in six nearby galaxy flows: Synthetic phase diagrams and self-similarity
Valtonen, M. J.; Chernin, A. D.; Teerikorpi, P. +4 more
Outward flows of galaxies are observed around groups of galaxies on spatial scales of about 1 Mpc, and around galaxy clusters on scales of 10 Mpc. Using recent data from the Hubble Space Telescope (HST), we have constructed two synthetic velocity-distance phase diagrams: one for four flows on galaxy-group scales and the other for two flows on clus…
Fractal properties of active regions
Golovko, A. A.; Salakhutdinova, I. I.
The dynamics of active regions have been investigated using multi-fractal analysis methods, based on magnetograms of the full solar disk in the 630.2 nm line obtained with the SOLIS vector spectromagnetograph of Kitt Peak Observatory (USA) during 2006-2007 and January 1, 2009-April 12, 2010. The applied method of multi-fractal segmentation reveals…
IR photometry and dust-shell models for two carbon stars
Bogdanov, M. B.; Taranova, O. G.
We present JHKLM photometry of the carbon stars ST And and T Lyn acquired in 2000-2010. Along with brightness variations due to pulsations, changes on timescales of 2000-3000 days are also observed. Our combined light curves can be satisfactorily represented with light elements derived from visual observations, but the maxima are delayed relative …