Search Publications
Relation between the parameters of dust and of molecular and atomic gas in extragalactic star-forming regions
Smirnova, K. I.; Wiebe, D. S.; Sobolev, A. M. +1 more
The relationships between atomic and molecular hydrogen and dust of various sizes in extragalactic star-forming regions are considered, based on observational data from the Spitzer and Herschel infrared space telescopes, the Very Large Array (atomic hydrogen emission) and IRAM (CO emission). The source sample consists of approximately 300 star-for…
Infrared Morphology of Regions of Ionized Hydrogen
Wiebe, D. S.; Kirsanova, M. S.; Topchieva, A. P. +1 more
A search for infrared ring nebulae associated with regions of ionized hydrogen has been carried out. The New GPS Very Large Array survey at 20 cm forms the basis of the search, together with observations obtained with the Spitzer Space Telescope at 8 and 24 µm and the Herschel Space Telescope at 70 µm. Objects having ring-like morpholo…
Search for close stellar encounters with the solar system from data on nearby dwarfs
Bobylev, V. V.
Trigonometric parallaxesmeasuredwith ground-based telescopes of the RECONS consortium as part of the CTIOPI program are used to search for stars that have either had an encounter with the solar system in the past or will have such an encounter in the future, at distances of less than a few parsecs. These are mainly low-mass dwarfs and subdwarfs of…
A dynamical study of the multiple system 17 Cygni ABFG
Romanenko, L. G.
Adynamical study of the relative motions of the components of the inner pairs AB (ADS 12913) and FG (ADS 12889) of the quadruple heirarchical system 17 Cygni (WDS 19464+3344) is presented, as well as analysis of themotions of the outer pair AB-FG. The study is based on CCD observations obtained on the 26-inch refractor of the Pulkovo Observatory (…
Scientific problems addressed by the Spektr-UV space project (world space Observatory—Ultraviolet)
Werner, K.; Strassmeier, K. G.; Lammer, H. +29 more
The article presents a review of scientific problems and methods of ultraviolet astronomy, focusing on perspective scientific problems (directions) whose solution requires UV space observatories. These include reionization and the history of star formation in the Universe, searches for dark baryonic matter, physical and chemical processes in the i…
Detail studies of the physical properties in the outer regions of galaxy clusters using Suzaku observations
Babyk, Iu. V.
A detailed physical analysis of five nearby galaxy clusters using Suzaku observationsis presented. The low and stable level of the instrumental background at large radii facilitate the determination of the main physical characteristics in clusters at the virial radius. The temperatures, metal abundances, and entropy profiles have been constructed …
Large-scale fluctuations in the number density of galaxies in independent surveys of deep fields
Baryshev, Yu. V.; Shirokov, S. I.; Lovyagin, N. Yu. +1 more
New arguments supporting the reality of large-scale fluctuations in the density of the visible matter in deep galaxy surveys are presented. A statistical analysis of the radial distributions of galaxies in the COSMOS and HDF-N deep fields is presented. Independent spectral and photometric surveys exist for each field, carried out in different wave…
Characteristics of GPS sources in the Planck survey
Volvach, A. E.; Kardashev, N. S.; Larionov, M. G. +1 more
Two series of 22.2 and 36.8-GHz observations of 43 GHz-Peaked Spectrum (GPS) radio sources from the Planck survey have been carried out using the 22-m radio telescope of the Crimean Astrophysical Observatory in 2014-2015, with the aim of studying the variability of these sources. The interval between the two series of observations was about nine m…
Long-term variability of active galactic nuclei from the "Planck" catalog
Volvach, A. E.; Kardashev, N. S.; Larionov, M. G. +1 more
A complete sample of 104 bright active galactic nuclei (AGNs) from the "Planck" catalog (early results) were observed at 36.8 GHz with the 22-m radio telescope of the Crimean Astrophysical Observatory (CrAO).Variability indices of the sources at this frequency were determined based on data from theWMAP space observatory, theMetsa¨ hovi RadioObserv…
IR photometry and models for the dust envelopes of two carbon stars
Bogdanov, M. B.; Taranova, O. G.
The results of JHKLM photometry of two carbon stars are presented: the irregular variable NQ Cas and the Mira star BD Vul. Data on the mean fluxes supplemented with mid-IR observations with the IRAS, AKARI, andWISE satellites are used to compute spherically symmetrical model dust envelopes for the stars, consisting of particles of amorphous carbon…