Zobrazeno 1 - 10
of 23
pro vyhledávání: '"I N Pashchenko"'
Autor:
D I Zobnina, H D Aller, M F Aller, D C Homan, Y Y Kovalev, M L Lister, I N Pashchenko, A B Pushkarev, T Savolainen
Publikováno v:
Monthly Notices of the Royal Astronomical Society.
Using stacking of images obtained at different epochs, we studied the variability properties of linear polarization of active galactic nucleus (AGN) jets on parsec-scales. Our sample is drawn from the MOJAVE programme, and consists of 436 AGNs manife
Autor:
A B Pushkarev, H D Aller, M F Aller, D C Homan, Y Y Kovalev, M L Lister, I N Pashchenko, T Savolainen, D I Zobnina
We analysed the parsec-scale linear polarization properties of 436 active galactic nuclei (AGN) based on 15 GHz polarimetric Very Long Baseline Array (VLBA) observations. We present polarization and total intensity images averaged over at least five
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7050cf44c8c2172c79fca5fdde3dd754
https://aaltodoc.aalto.fi/handle/123456789/121476
https://aaltodoc.aalto.fi/handle/123456789/121476
The spectral index images of the jet in the nearby radio galaxy M87 have previously been shown with Very Long Baseline Interferometric arrays at 2-43 GHz. They exhibit flattening of the spectra at a location of inner (central) spine and toward outer
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::261b91cd8fe8a84457db387e1f1e3827
http://arxiv.org/abs/2301.12861
http://arxiv.org/abs/2301.12861
We examine the effect of a jet transversal structure from magnetohydrodynamic semi-analytical modelling on the total intensity profiles of relativistic jets from active galactic nuclei. In order to determine the conditions for forming double- and tri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e3bdf9d2dd6d8f34fba3d24795480386
Geometry of relativistic jets in active galaxies provides important information about mechanisms of launching, collimation and acceleration of plasma flow. We propose a new method to probe a boundary shape of a jet on parsec scales -- in the vicinity
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a35707be236040a9465fe4a142e74950
http://arxiv.org/abs/2106.07569
http://arxiv.org/abs/2106.07569
Autor:
I. N. Pashchenko, A. V. Plavin
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 488:939-953
The physical parameters of the jets of active galactic nuclei observed with Very Long Baseline Interferometry (VLBI) are usually inferred from core-shift measurements or from the flux and size measured at the peak frequency of the synchrotron spectru
Autor:
A. M. Kutkin, Hugh D. Aller, Kirill Sokolovsky, M. F. Aller, I. N. Pashchenko, Yuri Y. Kovalev
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 486:430-439
Synchrotron self-absorption in active galactic nuclei (AGN) jets manifests itself as a time delay between flares observed at high and low radio frequencies. It is also responsible for the observing frequency dependent change in size and position of t
Autor:
I. N. Pashchenko
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 482:1955-1965
Very Long Baseline Interferometric (VLBI) observations of quasar jets enable one to measure many theoretically expected effects. Estimating the significance of observational findings is complicated by the correlated noise in the image plane. A reliab
Autor:
Luka Č. Popović, Hugh D. Aller, Christian Fendt, M. F. Aller, F. Jaron, Leonid Petrov, Michal Zajaček, Silke Britzen, I. N. Pashchenko, Andrea Tramacere, R Pánis
On 2019/07/30.86853 UT, IceCube detected a high-energy astrophysical neutrino candidate. The Flat Spectrum Radio Quasar PKS 1502+106 is located within the 50 percent uncertainty region of the event. Our analysis of 15 GHz Very Long Baseline Array (VL
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a0c4fb1488272cd319f3d146ab4fb2fe
http://arxiv.org/abs/2103.00292
http://arxiv.org/abs/2103.00292
Autor:
Jamie McCallum, A. S. Andrianov, J. R. Rizzo, M. S. Burgin, C. García-Miró, Paweł Wolak, E. V. Kravchenko, Yu. A. Kovalev, M. V. Shatskaya, Tuomas Savolainen, James M. Anderson, Alexander B. Pushkarev, A. V. Kovalenko, G. Giovannini, N. N. Shakhvorostova, Marcello Giroletti, A. M. Kutkin, I. A. Rakhimov, Mikhail M. Lisakov, V. I. Kostenko, Norbert Bartel, Sándor Frey, I. N. Pashchenko, Magdalena Kunert-Bajraszewska, Zhi-Qiang Shen, Tapasi Ghosh, D. G. Nair, P. de Vicente, Ivan Litovchenko, Kirill Sokolovsky, J. A. Zensus, Philip G. Edwards, Antonis Polatidis, Shinji Horiuchi, Anastasios Melis, V. A. Zuga, Frank D. Ghigo, Jun Yi Koay, Tao An, P. A. Voitsik, S. F. Likhachev, J. F. H. Quick, I. A. Girin, Marcin P. Gawronski, David L. Jauncey, M. A. Kharinov, C. S. Reynolds, A. E. Melnikov, N. S. Kardashev, Simon Ellingsen, V. Yu. Avdeev, Hayley Bignall, D. V. Ivanov, R. C. Vermeulen, Leonid I. Gurvits, Chris Phillips, Yuri Y. Kovalev, M. A. Shchurov, Alexey Rudnitskiy, Carlo Migoni
Publikováno v:
Advances in Space Research
The largest Key Science Program of the RadioAstron space VLBI mission is a survey of active galactic nuclei (AGN). The main goal of the survey is to measure and study the brightness of AGN cores in order to better understand the physics of their emis
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::772671b24e947bad6776e168efdff4be
https://aaltodoc.aalto.fi/handle/123456789/43103
https://aaltodoc.aalto.fi/handle/123456789/43103