Search Publications
A GALEX far-ultraviolet study of quasi-coeval samples of red giants
Smith, Graeme H.; Cochrane, Kevin M.
Samples of red giant branch (RGB) stars have been compiled from the literature for seven moving groups, and searches made for both GALEX FUV and Johnson
The compound stream event of March 20-25, 2011 as measured by the STEREO B spacecraft
Morgan, Huw; Al-Shakarchi, Duraid A.
The interaction of interplanetary coronal mass ejections (ICME) with each other and with co-rotating interaction regions (CIR) changes their configuration, dynamics, magnetic field and plasma characteristics and can make space weather forecasting difficult. During the period of March 20–25, 2011, the Solar Terrestrial Relation Observatory (STEREO …
Characterizing some Gaia Alerts with LAMOST and SDSS
Liu, X.; Pursimo, T.; Dennefeld, M. +2 more
The ESA-Gaia satellite is regularly producing Alerts on objects where photometric variability has been detected after several passages over the same region of the sky. The physical nature of these objects has often to be determined with the help of complementary observations from ground-based facilities. We have compared the list of Gaia Alerts (f…
Virial models and anisotropy of velocity dispersion in E-galaxies
Kondratyev, B. P.; Kireeva, E. N.
A tensor virial approach is used to construct detailed models of 22 flattened ellipticals. The models are combined with the new observational data: extended surface brightness distributions, the profiles of isophotes flattening and their twisting, the rotation curves and the velocity dispersion profiles. A key feature of these models is a rigorous…
Local dark energy in the Sculptor Filament of galaxies
Pruzhinskaya, M. V.; Karachentsev, I. D.; Chernin, A. D.
Two dozens of different mass galaxies observed at distances less than 10 Mpc from the Local Group are organized in the elongated structure known as the Sculptor Filament. We use recent Hubble Space Telescope data on local galaxies to study the dynamical structure and evolutionary trends of the filament. An N-body computer model, which reproduces i…
Spectrum of imbalanced Alfvénic turbulence at ion-kinetic scales in the solar wind
Voitenko, Y. M.; Gogoberidze, G.
Using a semi-phenomenological model of the imbalanced Alfvénic turbulence, we study the turbulence transition from magnetohydrodynamic to sub-ion kinetic scales in the conditions typical for the fast solar wind. We show that the transition takes place in a wide wave number interval where the energy spectrum does not follow any power law. For large…
HD 54361: evidence for the status of a low mass TP-AGB star
Schmidt, M.; Sperauskas, J.; Začs, L. +3 more
The mass of the cool carbon star HD 54361 was suspected to be high, assuming the membership in the stellar association CMa OB1, in conflict with the theory of stellar evolution. The Gaia parallax and a high-resolution spectrum in the wavelength region from about 4800 to 6900 Å was employed in order to update the distance, atmospheric parameters an…
Exoplanet system Kepler-2 with comparisons to Kepler-1 and 13
Budding, Edwin; Rhodes, Michael D.; Banks, Timothy S. +1 more
We have carried out an intensive study of photometric (Kepler Mission) and spectroscopic data on the system Kepler-2 (HAT-P-7A) using the dedicated software WINFITTER 6.4. The mean individual data-point error of the normalized flux values for this system is 0.00015, leading to the model's specification for the mean reference flux to an accuracy of…