10 citations · 29 across the 19 of their papers we have counts for
19 papers
Continuous Filament Network of the Local Universe
Anatoliy Tugay, Mariusz Tarnopolski
Simulated galaxy distributions are suitable for developing filament detection algorithms. However, samples of observed galaxies, being of limited size, cause difficulties that lead…
The sample of eight LLAGNs: X-ray properties
Nadiia G. Pulatova, Anatoliy V. Tugay, Lidiia V. Zadorozhna
LLAGN are very important objects for studying as they are found in a large fraction of all massive galaxies. Nevertheless this topic needs more investigation as fraction of LLAGN i…
Infrared counterparts of X-ray galaxies
A. Tugay, S. Shevchenko
Population studies of the extragalactic objects are a major part of the universe large-scale structure study. Apart from radio, infrared, and visible wavelength bands, observations…
Luminosity - Spectral Index Dependence of X-ray Bright Seyfert Galaxies
V. A. Sadova, A. V. Tugay
X-ray luminosities and spectral indices of 97 bright Seyfert 1 galaxies from XMM archive are analyzed in this article. Distribution of these values is random so we conclude that th…
X-ray Emission and Orientation of Selected PF Galaxy Clusters
A. V. Tugay, S. S. Dylda, E. A. Panko
X-ray counterparts for 35 galaxy clusters contained in the PF catalog of galaxy clusters and groups were found in XMM-Newton archive. 22 ones (all from ACO catalogue) have extended…
Statistical Analysis of Large-Scale Structure of Universe
A. V. Tugay
While galaxy cluster catalogs were compiled many decades ago, other structural elements of cosmic web are detected at definite level only in the newest works. For example, extragal…
Determination of the Galaxy Cluster Orientation Using X-ray Images by FOCAS Method
A. V. Tugay, S. Yu. Shevchenko
In our work we considered orientations of bright X-ray halos of the galaxy clusters (mainly Abell clusters). 78 appropriate clusters were selected using data from Xgal sample of ex…
X-ray Emission of ICRF Sources
V. V. Voitsekhovskiy, A. V. Tugay, V. V. Tkachuk +1
Considering increasing requirements to the coordinates measurement precision by the end of XX century International Astronomical Union commenced implementation of the new astrometr…
Simulation of Large-Scale Structure of Universe by Gaussian Random Fields
V. V. Voitsekhovskiy, A. V. Tugay
Large-scale structure of Universe includes galaxy clusters connected by filaments. Voids occupy the rest of cosmic volume. The search of any dependencities in filament structure ca…
Numerical Estimator for Large-Scale Cosmic Structures
A. V. Tugay, N. G. Pulatova, A. D. Zhoga
Components of large-scale structure (LSS) of Universe includes galaxy clusters, walls, filaments, groups and field galaxies. The question of spatial organization of all these compo…
Surface Brightness Profiles of Seyfert Galaxies
A. V. Tugay, S. L. Shihov
We built r-band surface brightness profiles by SDSS data for 16 Seyfert galaxies observed in Crimean Astrophysical Observatory. Obtained profiles can be used for finding more accur…
Extragalactic filament detection with a layer smoothing method
Anatoliy V. Tugay
Filaments are clearly visible in galaxy distributions, but they are hardly detected by computer algorithms. Most methods of filament detection can be used only with numerical simul…
X-ray galaxies in nearby filaments
Anatoliy V. Tugay
New sample of X-ray galaxies selected from 2XMMi catalogue in SDSS region is analysed in this work. Spatial distribution and X-ray AGN spectral properties are discussed. A new meth…
Determination of dark matter type by X-ray sources statistics
Anatoliy V. Tugay
The current cosmological model includes cold dark matter, which consists of massive nonrelativistic particles. There are also some observational and theoretical evidences for warm…
Bright X-ray galaxies in SDSS filaments
A. V. Tugay
Eighteen bright X-ray emitting galaxies were found in nearby filaments within SDSS region. Basic X-ray spectral parameters were estimated for these galaxies using power law model w…
Signatures of large-scale structure of Universe in X-rays
Anatoliy Tugay
A new sample of 4299 galaxies with X-ray emission was obtained in this work by cross-correlating 2XMM catalog of X-ray sources with HyperLeda database of galaxies. We analyzed dist…
Angular and spatial clustering of photometrically classified quasar candidates from SDSS NBCKDE
G. Ivashchenko, O. Vasylenko, A. V. Tugay
The present paper analyses the quasar clustering using the two-point correlation function (2pCF) and the largest existing sample of photometrically selected quasars: the SDSS NBCKD…
Correlation function of quasars in real and redshift space from the Sloan Digital Sky Survey Data Release 7
G. Ivashchenko, V. I. Zhdanov, A. V. Tugay
We analyze the quasar two-point correlation function (2pCF) within the redshift interval using a sample of 52303 quasars selected from the recent 7th Data Release of th…
New list of peculiar velocities of RFGC galaxies
S. L. Parnovsky, A. V. Tugay
We present a new version of the list of peculiar velocities of 1561 flat edge-on spirals from the RFGC catalogue. It differs from the previous version by 233 new data and 34 correc…