100 citations · 559 across the 18 of their papers we have counts for
17 papers
The Halo Mass-Temperature Relation for Clusters, Groups, and Galaxies
Iurii Babyk, Brian McNamara
The halo mass-temperature relation for a sample of 216 galaxy clusters, groups, and individual galaxies observed by X-ray Observatory is presented. Using accurate spectra…
A Trail of the Invisible: Blue Globular Clusters Trace the Radial Density Distribution of the Dark Matter -- Case Study of NGC 4278
Matthias Kluge, Rhea-Silvia Remus, Iurii V. Babyk +2
We present new, deep optical observations of the early-type galaxy NGC 4278, which is located in a small loose group. We find that the galaxy lacks fine substructure, i.e., it appe…
Molecular Flows in Contemporary Active Galaxies and the Efficacy of Radio-Mechanical Feedback
Prathamesh D. Tamhane, Brian R. McNamara, Helen R. Russell +4
Molecular gas flows are analyzed in 14 cluster galaxies (BCGs) centered in cooling hot atmospheres. The BCGs contain of molecular gas, much of which is…
Atmospheric pressure and molecular cloud formation in early-type galaxies
Iurii Babyk, Brian McNamara, Paul Nulsen +3
A strong correlation between atmospheric pressure and molecular gas mass is found in central cluster galaxies and early-type galaxies. This trend and a similar trend with atmospher…
Measuring Dark Matter in Galaxies: The Mass Fraction Within 5 Effective Radii
William E. Harris, Rhea-Silvia Remus, Gretchen L. H. Harris +1
Large galaxies may contain an "atmosphere" of hot interstellar X-ray gas, and the temperature and radial density profile of this gas can be used to measure the total mass of the ga…
Thermally Unstable Cooling Stimulated by Uplift: The Spoiler Clusters
C. G. Martz, B. R. McNamara, P. E. J. Nulsen +9
We analyzed Chandra X-ray observations of five galaxy clusters whose atmospheric cooling times, entropy parameters, and cooling time to free-fall time ratios within the central gal…
Globular Cluster Systems and X-Ray Atmospheres in Galaxies
Gretchen L. H. Harris, Iurii V. Babyk, William E. Harris +1
We compare the empirical relationships between the mass of a galaxy's globular system M_GCS, the gas mass in the hot X-ray atmosphere M_X within a fiducial radius of 5 r_e, the tot…
Origins of molecular clouds in early-type galaxies
Iu. V. Babyk, B. R. McNamara, P. D. Tamhane +3
We analyze observations of the hot atmospheres of 40 early spiral and elliptical galaxies. Using new temperature, density, cooling time, and mass profiles, we explore rel…
X-ray scaling relations of early-type galaxies
Iu. V. Babyk, B. R. McNamara, P. E. J. Nulsen +5
X-ray luminosity, temperature, gas mass, total mass, and their scaling relations are derived for 94 early-type galaxies using archival X-ray Observatory observations. Con…
A Universal Entropy Profile for the Hot Atmospheres of Galaxies and Clusters within
Iu. V. Babyk, B. R. McNamara, P. E. J. Nulsen +4
We present atmospheric gas entropy profiles for 40 early type galaxies and 110 clusters spanning several decades of halo mass, atmospheric gas mass, radio jet power, and galaxy typ…
Study of orbital and superorbital variability of LSI +61 303 with X-ray data
M. Chernyakova, Iu. Babyk, D. Malyshev +4
LSI +61 303 is one of the few X-ray binaries with a Be star companion from which radio, X-rays and high-energy gamma-ray (GeV and TeV) emission have been observed. The nature of th…
The Onset of Thermally Unstable Cooling from the Hot Atmospheres of Giant Galaxies in Clusters - Constraints on Feedback Models
M. T. Hogan, B. R. McNamara, F. Pulido +7
We present accurate mass and thermodynamic profiles for a sample of 56 galaxy clusters observed with the Chandra X-ray Observatory. We investigate the effects of local gravitationa…
Multi-wavelength Observations of the Binary System PSR B1259-63/LS~2883 around the 2014 Periastron Passage
M. Chernyakova, A. Neronov, B. van Soelen +16
We report on the results of the extensive multi-wavelength campaign from optical to GeV gamma-rays of the 2014 periastron passage of PSR B1259-63, which is a unique high-mass gamma…
Multi-wavelength observations of the binary system PSR B1259-63/LS 2883 around the 2010-2011 periastron passage
M. Chernyakova, A. A. Abdo, A. Neronov +14
We report on broad multi-wavelength observations of the 2010-2011 periastron passage of the gamma-ray loud binary system PSR B1259-63. High resolution interferometric radio observa…
Nonthermal emission model of isolated X-ray pulsar RX J0420.0-5022
Nino Chkheidze, Iurii Babyk
In the present paper an alternative theoretical interpretation to the generally assumed thermal emission models of the observed X-ray spectrum of isolated pulsar RX J0420.0-5022 is…
The evolution of the luminosity-temperature-mass relations of hot gas in Chandra clusters at 0.4 < z < 1.4
Iu. Babyk, I. Vavilova
We analyzed the luminosity-temperature-mass of gas (L_{X} - T - M_{g}) relation for sample of galaxy clusters that have been observed by the Chandra satellite. We used 21 high-reds…
The Dark Matter Haloes of Chandra X-ray Galaxy Clusters and Baryons Effect
Iu. Babyk, I. Vavilova, A. Del Popolo
We present results based on Chandra observations of a large sample of 129 hot galaxy clusters. We measure the concentration parameter c_200, the dark mass M_200 and the baryonic ma…