Search Results - "Pushkarev, A. B"

Significant core shift variability in parsec-scale jets of active galactic nuclei by Plavin, A V, Kovalev, Y Y, Pushkarev, A B, Lobanov, A P

“…Abstract The apparent position of jet base (core) in radio-loud active galactic nuclei changes with frequency because of synchrotron self-absorption. Studying…”
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MOJAVE. XVII. Jet Kinematics and Parent Population Properties of Relativistically Beamed Radio-loud Blazars by Lister, M. L., Homan, D. C., Hovatta, T., Kellermann, K. I., Kiehlmann, S., Kovalev, Y. Y., Max-Moerbeck, W., Pushkarev, A. B., Readhead, A. C. S., Ros, E., Savolainen, T.

“…We present results from a parsec-scale jet kinematics study of 409 bright radio-loud active galactic nuclei (AGNs) based on 15 GHz Very Long Baseline Array…”
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A transition from parabolic to conical shape as a common effect in nearby AGN jets by Kovalev, Y Y, Pushkarev, A B, Nokhrina, E E, Plavin, A V, Beskin, V S, Chernoglazov, A V, Lister, M L, Savolainen, T

“…ABSTRACT Observational studies of collimation in jets in active galactic nuclei (AGN) are a key to understanding their formation and acceleration processes. We…”
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Physical parameters of active galactic nuclei derived from properties of the jet geometry transition region by Nokhrina, E E, Kovalev, Y Y, Pushkarev, A B

“…ABSTRACT We use the observed jet boundary transition from parabolic to conical shape, which was previously discovered to be a possible common property in…”
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Residual Entropy as a Diagnostic and Stopping Metric for CLEAN by Homan, D. C., Roth, J. S., Pushkarev, A. B.

“…Abstract We propose the use of entropy, measured from the spatial and flux distribution of pixels in the residual image, as a potential diagnostic and stopping…”
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Multifrequency study of the gamma-ray flaring BL Lacertae object PKS 2233–148 in 2009–2012 by Pushkarev, A B, Butuzova, M S, Kovalev, Y Y, Hovatta, T

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MOJAVE XVI: Multiepoch Linear Polarization Properties of Parsec-scale AGN Jet Cores by Hodge, M. A., Lister, M. L., Aller, M. F., Aller, H. D., Kovalev, Y. Y., Pushkarev, A. B., Savolainen, T.

“…We present an analysis of the core linear polarization properties of 387 parsec-scale active galactic nuclei (AGNs) jets. Using 15 GHz VLBA data, we revisit…”
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An Oversized Magnetic Sheath Wrapping around the Parsec-scale Jet in 3C 273 by Lisakov, M. M., Kravchenko, E. V., Pushkarev, A. B., Kovalev, Y. Y., Savolainen, T. K., Lister, M. L.

“…Abstract In recent studies, several active galactic nuclei (AGNs) have exhibited gradients of the Faraday rotation measure (RM) transverse to their…”
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Erratum: “Monitoring of Jets in Active Galactic Nuclei with VLBA Experiments. XVIII. Kinematics and Inner Jet Evolution of Bright Radio-loud Active Galaxies” (2021, ApJ, 923, 30) by Lister, M. L., Homan, D. C., Kellermann, K. I., Kovalev, Y. Y., Pushkarev, A. B., Ros, E., Savolainen, T.

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Reversals in the Direction of Polarization Rotation in OJ 287 by Cohen, M. H., Aller, H. D., Aller, M. F., Hovatta, T., Kharb, P., Kovalev, Y. Y., Lister, M. L., Meier, D. L., Pushkarev, A. B., Savolainen, T.

“…We have obtained a smooth time series for the electric vector position angle (EVPA) of the blazar OJ 287 at centimeter wavelengths, by making nπ adjustments to…”
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RELATIVISTIC JETS IN THE RADIO REFERENCE FRAME IMAGE DATABASE. II. BLAZAR JET ACCELERATIONS FROM THE FIRST 10 YEARS OF DATA (1994-2003) by PINER, B. G, PUSHKAREV, A. B, KOVALEV, Y. Y, MARVIN, C. J, ARENSON, J. G, CHARLOT, P, FEY, A. L, COLLIOUD, A, VOITSIK, P. A

“…We analyze blazar jet apparent speeds and accelerations from the RDV series of astrometric and geodetic very long baseline interferometry (VLBI) experiments…”
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STUDIES OF THE JET IN BL LACERTAE. I. RECOLLIMATION SHOCK AND MOVING EMISSION FEATURES by Cohen, M H, Meier, D L, Arshakian, T G, Homan, D C, Hovatta, T, Kovalev, Y Y, Lister, M L, Pushkarev, A B, Richards, J L, Savolainen, T

“…Parsec-scale VLBA images of BL Lac at 15 GHz show that the jet contains a permanent quasi-stationary emission feature 0.26 mas (0.34 pc projected) from the…”
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STUDIES OF THE JET IN BL LACERTAE. II. SUPERLUMINAL ALFVÉN WAVES by Cohen, M. H., Meier, D. L., Arshakian, T. G., Clausen-Brown, E., Homan, D. C., Hovatta, T., Kovalev, Y. Y., Lister, M. L., Pushkarev, A. B., Richards, J. L., Savolainen, T.

“…ABSTRACT We study the kinematics of ridge lines on the parsec-scale jet of the active galactic nucleus BL Lacertae. We show that the ridge lines display…”
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Spine–sheath polarization structures in four active galactic nuclei jets by Pushkarev, A. B., Gabuzda, D. C., Vetukhnovskaya, Yu. N., Yakimov, V. E.

“…We present the results of multifrequency (15 + 8 + 5 GHz) polarization Very Long Baseline Array (VLBA) observations of the three BL Lacertae objects 0745+241,…”
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The first gamma-ray outburst of a narrow-line Seyfert 1 galaxy: the case of PMNJ0948+0022 in 2010 July by Foschini, L, Ghisellini, G, Kovalev, Y. Y, Lister, M. L, D'Ammando, F, Thompson, D. J, Tramacere, A, Angelakis, E, Donato, D, Falcone, A, Fuhrmann, L, Hauser, M, Kovalev, Yu. A, Mannheim, K, Maraschi, L, Max-Moerbeck, W, Nestoras, I, Pavlidou, V, Pearson, T. J, Pushkarev, A. B, Readhead, A. C. S, Richards, J. L, Stevenson, M. A, Tagliaferri, G, Tibolla, O, Tavecchio, F, Wagner, S

“…We report on a multiwavelength campaign for the radio-loud narrow-line Seyfert 1 (NLS1) galaxy PMNJ0948+0022 (z= 0.5846) performed in 2010 July-September and…”
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Milky Way scattering properties and intrinsic sizes of active galactic nuclei cores probed by very long baseline interferometry surveys of compact extragalactic radio sources by Pushkarev, A. B., Kovalev, Y. Y.

“…We have measured the angular sizes of radio cores of active galactic nuclei (AGNs) and analysed their sky distributions and frequency dependences to study…”
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Core shift in parabolic accelerating jets by Nokhrina, E E, Pushkarev, A B

“…ABSTRACT The core-shift method is a powerful method to estimate the physical parameters in relativistic jets from active galactic nuclei. The classical…”
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Monitoring Of Jets in Active Galactic Nuclei with VLBA Experiments. XVIII. Kinematics and Inner Jet Evolution of Bright Radio-loud Active Galaxies by Lister, M. L., Homan, D. C., Kellermann, K. I., Kovalev, Y. Y., Pushkarev, A. B., Ros, E., Savolainen, T.

“…Abstract We have analyzed the parsec-scale jet kinematics of 447 bright radio-loud active active galactic nuclei (AGN), based on 15 GHz Very Long Baseline…”
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The Relation Between AGN Gamma-Ray Emission and Parsec-Scale Radio Jets by Kovalev, Y. Y, Aller, H. D, Aller, M. F, Homan, D. C, Kadler, M, Kellermann, K. I, Kovalev, Yu. A, Lister, M. L, McCormick, M. J, Pushkarev, A. B, Ros, E, Zensus, J. A

“…We have compared the radio emission from a sample of parsec-scale active galactic nucleus (AGN) jets as measured by the VLBA at 15 GHz, with their associated…”
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MOJAVE. XIX. Brightness Temperatures and Intrinsic Properties of Blazar Jets by Homan, D. C., Cohen, M. H., Hovatta, T., Kellermann, K. I., Kovalev, Y. Y., Lister, M. L., Popkov, A. V., Pushkarev, A. B., Ros, E., Savolainen, T.

“…Abstract We present multiepoch, parsec-scale core brightness temperature observations of 447 active galactic nucleus (AGN) jets from the MOJAVE and 2 cm Survey…”
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