Search Publications
Rotation curve and mass distribution in the Galaxy from the velocities of objects at distances up to 200 kpc
Bobylev, V. V.; Bajkova, A. T.
Three three-component (bulge, disk, halo) model Galactic gravitational potentials differing by the expression for the dark matter halo are considered. The central (bulge) and disk components are described by the Miyamoto-Nagai expressions. The Allen-Santillán (I), Wilkinson-Evans (II), and Navarro-Frenk-White (III) models are used to describe the …
Extinction law at a distance up to 25 kpc toward the Galactic poles
Gontcharov, G. A.
Photometry from the Tycho-2, 2MASS, andWISE catalogues for clump and branch giants at a distance up to 25 kpc toward the Galactic poles has allowed the variations of various characteristics of the infrared interstellar extinction law with distance to be analyzed. The results obtained by the extinction law extrapolation method are consistent for di…
Additional spectroscopic redshift measurements for galaxy clusters from the first Planck catalogue
Aghanim, N.; Melnikov, S. S.; Irtuganov, E. N. +10 more
We present the results of spectroscopic redshift measurements for the galaxy clusters from the first all-sky Planck catalogue that have been mostly identified based on the optical observations performed previously by our team (Planck Collaboration 2015a). Data on 13 galaxy clusters at redshifts from z ≈ 0.2 to z ≈ 0.8, including the improved ident…
X-ray nova MAXI J1828-249. Evolution of the broadband spectrum during its 2013-2014 outburst
Grebenev, S. A.; Burenin, R. A.; Krivonos, R. A. +2 more
Based on data from the SWIFT, INTEGRAL, MAXI/ISS orbital observatories, and the ground-based RTT-150 telescope, we have investigated the broadband (from the optical to the hard X-ray bands) spectrum of the X-ray nova MAXI J1828-249 and its evolution during the outburst of the source in 2013-2014. The optical and infrared emissions from the nova ar…
Catalog of candidates for quasars at 3 < z < 5.5 selected among X-Ray sources from the 3XMM-DR4 survey of the XMM-Newton observatory
Sazonov, S. Yu.; Khorunzhev, G. A.; Burenin, R. A. +1 more
We have compiled a catalog of 903 candidates for type 1 quasars at redshifts 3 < z < 5.5 selected among the X-ray sources of the "serendipitous" XMM-Newton survey presented in the 3XMMDR4 catalog (the median X-ray flux is ≈5 × 10-15 erg s-1 cm-2 in the 0.5-2 keV energy band) and located at high Galactic latit…
Stellar subsystems of the galaxy NGC 1313
Tikhonov, N. A.; Galazutdinova, O. A.
Based on archival Hubble Space Telescope (HST) ACS/WFC images, we have performed stellar photometry for eight fields of the spiral galaxy NGC 1313 and its satellite, the low-mass Sph/Irr galaxy AM0319-662. Stars of various ages have been identified on the constructed Hertzsprung-Russell diagrams: young supergiants, middle-aged stars, and old stars…
Peculiarities of the accretion flow in the system HL CMa
Lutovinov, A. A.; Revnivtsev, M. G.; Semena, A. N. +2 more
The properties of the aperiodic luminosity variability for the dwarf novaHLCMa are considered. The variability of the system HL CMa is shown to be suppressed at frequencies above 0.7 × 10-2 Hz. Different variability suppression mechanisms related to the radiation reprocessing time, partial disk evaporation, and characteristic variabilit…
Spectroscopic study of the peculiar galaxy IC 883
Burenkov, A. N.; Karataeva, G. M.; Yakovleva, V. A. +3 more
We analyze new optical spectroscopic observations obtained at the 6-m telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences with the SCORPIO focal reducer (in the modes of a Fabry-Perot interferometer (FPI) and long-slit spectroscopy) and the Multi-Pupil Fiber Spectrograph for the galaxy IC 883. We have confirmed th…