Zobrazeno 1 - 10
of 1 112
pro vyhledávání: '"Aller, M."'
Autor:
de la Parra, P. V., Readhead, A. C. S, Herbig, T., Kiehlmann, S., Lister, M. L., Pavlidou, V., Reeves, R. A., Siemiginowska, A., Sullivan, A. G., Surti, T., Synani, A., Tassis, K., Taylor, G. B., Wilkinson, P. N., Aller, M. F., Blandford, R. D., Globus, N., Lawrence, C. R., Molina, B., O'Neill, S., Pearson, T. J.
This paper addresses, for the first time, a key aspect of the phenomenology of Compact Symmetric Objects (CSOs) -- the characteristics of their radio spectra. We present a radio-spectrum description of a complete sample of high luminosity CSOs (CSO-2
Externí odkaz:
http://arxiv.org/abs/2408.13077
Autor:
de la Parra, P. V., Kiehlmann, S., Mroz, P., Readhead, A. C. S., Synani, A., Begelman, M. C., Blandford, R. D., Ding, Y., Harrison, F., Liodakis, I., Max-Moerbeck, W., Pavlidou, V., Reeves, R., Vallisneri, M., Aller, M. F., Graham, M. J., Hovatta, T., Lawrence, C. R., Lazio, T. J. W., Mahabal, A. A., Molina, B., O'Neill, S., Pearson, T. J., Ravi, V., Tassis, K., Zensus, J. A.
Owens Valley Radio Observatory (OVRO) observations of supermassive black hole binary (SMBHB) candidate PKS~2131$-$021 revealed, for the first time, six likely characteristics of the phenomenology exhibited by SMBHB in blazars, of which the most unexp
Externí odkaz:
http://arxiv.org/abs/2408.02645
Autor:
Zobnina, D. I., Aller, H. D., Aller, M. F., Homan, D. C., Kovalev, Y. Y., Lister, M. L., Pashchenko, I. N., Pushkarev, A. B., Savolainen, T.
Publikováno v:
MNRAS 523 (2023) 3615
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
Externí odkaz:
http://arxiv.org/abs/2211.15624
Autor:
Pushkarev, A. B., Aller, M. F., Aller, H. D., Homan, D. C., Kovalev, Y. Y., Lister, M. L., Pashchenko, I. N., Savolainen, T., Zobnina, D.
Publikováno v:
MNRAS 520 (2023) 6053
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:
http://arxiv.org/abs/2209.04842
Autor:
Peirson, A. L., Liodakis, I., Readhead, A. C. S., Lister, M. L., Perlman, E. S., Aller, M. F., Blandford, R. D., Grainge, K. J. B., Green, D. A., Gurwell, M. A., Hodges, M. W., Hovatta, T., Kiehlmann, S., Lähteenmäki, A., Max-Moerbeck, W., Mcaloone, T., O'Neill, S., Pavlidou, V., Pearson, T. J., Ravi, V., Reeves, R. A., Scott, P. F., Taylor, G. B., Titterington, D. J., Tornikoski, M., Vedantham, H. K., Wilkinson, P. N., Williams, D. T., Zensus, J. A.
Symmetric Achromatic Variability (SAV) is a rare form of radio variability in blazars that has been attributed to gravitational millilensing by a ~$10^2 - 10^5$ $M_\odot$ mass condensate. Four SAVs have been identified between 1980 and 2020 in the lo
Externí odkaz:
http://arxiv.org/abs/2201.01110
Autor:
O'Neill, S., Kiehlmann, S., Readhead, A. C. S., Aller, M. F., Blandford, R. D., Liodakis, I., Lister, M. L., Mróz, P., O'Dea, C. P., Pearson, T. J., Ravi, V., Vallisneri, M., Cleary, K. A., Graham, M. J., Grainge, K. J. B., Hodges, M. W., Hovatta, T., Lähteenmäki, A., Lamb, J. W., Lazio, T. J. W., Max-Moerbeck, W., Pavlidou, V., Prince, T. A., Reeves, R. A., Tornikoski, M., de la Para, P. Vergara, Zensus, J. A.
Most large galaxies host supermassive black holes in their nuclei and are subject to mergers, which can produce a supermassive black hole binary (SMBHB), and hence periodic signatures due to orbital motion. We report unique periodic radio flux densit
Externí odkaz:
http://arxiv.org/abs/2111.02436
Autor:
Kakegawa, Wataru, Paternain, Ana V., Matsuda, Keiko, Aller, M. Isabel, Iida, Izumi, Miura, Eriko, Nozawa, Kazuya, Yamasaki, Tokiwa, Sakimura, Kenji, Yuzaki, Michisuke, Lerma, Juan
Publikováno v:
In Cell Reports 23 July 2024 43(7)
Autor:
Liodakis, I., Hovatta, T., Aller, M. F., Aller, H. D., Gurwell, M. A., Lähteenmäki, A., Tornikoski, M.
Publikováno v:
A&A 654, A169 (2021)
Supermassive black holes launch highly relativistic jets with velocities reaching Lorentz factors as high as $\Gamma>50$. How the jets accelerate to such high velocities and where along the jet do they reach terminal velocity are open questions that
Externí odkaz:
http://arxiv.org/abs/2108.10892
Autor:
Readhead, A. C. S., Ravi, V., Liodakis, I., Lister, M. L., Singh, V., Aller, M. F., Blandford, R. D., Browne, I. W. A., Gorjian, V., Grainge, K. J. B., Gurwell, M. A., Hodges, M. W., Hovatta, T., Kiehlmann, S., Lähteenmäki, A., McAloone, T., Max-Moerbeck, W., Pavlidou, V., Pearson, T. J., Peirson, A. L., Perlman, E. S., Reeves, R. A., Soifer, B. T., Taylor, G. B., Tornikoski, M., Vedantham, H. K., Werner, M., Wilkinson, P. N., Zensus, J. A.
PKS 1413+135 is one of the most peculiar blazars known. Its strange properties led to the hypothesis almost four decades ago that it is gravitationally lensed by a mass concentration associated with an intervening galaxy. It exhibits symmetric achrom
Externí odkaz:
http://arxiv.org/abs/2012.04045
Autor:
Kapanadze, B., Gurchumelia, A., Dorner, D., Vercellone, S., Romano, P., Hughes, P., Aller, M., Aller, H., Kharshiladze, O.
Publikováno v:
The Astrophysical Journal, 2020
We present the results from the timing and spectral study of Mrk\,421 based mainly on the \emph{Swift} data in the X-ray energy range obtained during the time interval 2015\,December--2018\,April. The most extreme X-ray flaring activity on the long-t
Externí odkaz:
http://arxiv.org/abs/2004.00676