Zobrazeno 1 - 10
of 163
pro vyhledávání: '"Aller, Margo"'
Autor:
Kiehlmann, Sebastian, De La Parra, Philipe Vergara, Sullivan, Andrew, Synani, A., Liodakis, Ioannis, Readhead, Anthony, Graham, Matthew, Begelman, Mitchell, Blandford, Roger, Chatziioannou, Katerina, Ding, Yuanze, Harrison, Fiona, Homan, D., Hovatta, Talvikki, Kulkarni, Shrinivas, Lister, Matthew, Maiolino, Roberto, Max-Moerbeck, Walter, Molina, B., Mroz, Przemyslaw, O'Dea, Christopher, Pavlidou, Vasiliki, Pearson, Timothy J., Aller, Margo, Lawrence, C., Lazio, T. Joseph, O'Neill, S., Prince, Thomas, Ravi, Vikram, Reeves, Rodrigo, Tassis, Konstantinos, Vallisneri, Michele, Zensus, J.
Haystack and Owens Valley Radio Observatory (OVRO) observations recently revealed strong sinusoidal total flux density variations that maintained coherence between 1975 and 2021 in the blazar PKS 2131-021 ($z=1.283)$. This was interpreted as possible
Externí odkaz:
http://arxiv.org/abs/2407.09647
Autor:
A, Krishna Mohana, Gupta, Alok C., Marscher, Alan P., Sotnikova, Yulia V., Jorstad, S. G., Wiita, Paul J., Cui, Lang, Aller, Margo F., Aller, Hugh D., Kovalev, Yu. A., Kovalev, Y. Y., Liu, Xiang, Mufakharov, T. V., Popkov, A. V., Mingaliev, M. G., Erkenov, A. K., Nizhelsky, N. A., Tsybulev, P. G., Zhao, Wei, Weaver, Z. R., Morozova, D. A.
Publikováno v:
MNRAS 527 (2024) 6970
We present the results of our study of cross-correlations between long-term multi-band observations of the radio variability of the blazar 3C 279. More than a decade (2008-2022) of radio data were collected at seven different frequencies ranging from
Externí odkaz:
http://arxiv.org/abs/2311.02395
Autor:
Goyal, Arti, Soida, Marian, Stawarz, Lukasz, Wiita, Paul J., Nilsson, Kari, Jorstad, Svetlana, Marscher, Alan P., Aller, Margo F., Aller, Hugh D., Lahteenmaki, Anne, Hovatta, Talvikki, Zola, Staszek, Nalewajko, Krzysztof, Tornikoski, Merja, Tammi, Joni, Hodges, Mark, Kiehlmann, Sebastian, Readhead, Anthony C. S., Max-Moerbeck, Walter, Lindfors, Elina, Ramazani, Vandad Fallah, Reichart, D. E., Caton, D. B., Valverde, Janeth, Horan, Deirdre, Ojha, Roopesh, van Zyl, Pfesesani
We present the results of variability power spectral density (PSD) analysis using multiwavelength radio to GeV\,$\gamma$-ray light curves covering decades/years to days/minutes timescales for the blazars 3C 279 and PKS 1510-089. The PSDs are modeled
Externí odkaz:
http://arxiv.org/abs/2112.04194
Autor:
Britzen, Silke, Zajaček, Michal, Popović, Luka Č., Fendt, Christian, Tramacere, Andrea, Pashchenko, Ilya N., Jaron, Frédéric, Pánis, Radim, Petrov, Leonid, Aller, Margo F., Aller, Hugh D.
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:
http://arxiv.org/abs/2103.00292
Autor:
Tripathi, Ashutosh, Gupta, Alok C., Aller, Margo F., Wiita, Paul J., Bambi, Cosimo, Aller, Hugh, Gu, Minfeng
Publikováno v:
Mon. Not. Roy. Astron. Soc. 501, 5997-6006 (2021)
We present time series analyses of three-decade long radio observations of the BL Lacertae object AO 0235+164 made at the University of Michigan Radio Astronomical Observatory operating at three central frequencies of 4.8 GHz, 8.0 GHz and 14.5 GHz. W
Externí odkaz:
http://arxiv.org/abs/2101.02497
Autor:
Kutkin, Alexander, Pashchenko, Ilya, Sokolovsky, Kirill, Kovalev, Yuri Y., Aller, Margo, Aller, Hugh
Publikováno v:
MNRAS 486 (2019) 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
Externí odkaz:
http://arxiv.org/abs/1809.05536
Publikováno v:
Galaxies, 2017, 5(4), 75
The University of Michigan 26-m paraboloid was dedicated to obtaining linear polarization and total flux density observations of blazars from the mid-1960s until June 2012 providing an unprecedented record tracking centimeter-band variability over de
Externí odkaz:
http://arxiv.org/abs/1711.05763
Autor:
Aller, Margo F., Hughes, Philip A., Aller, Hugh D., Hovatta, Talvikki, Ramakrishnan, Venkatessh
Since the mid-1980s the shock-in-jet model has been the preferred paradigm to explain radio-band flaring in blazar jets. We describe our radiative transfer model incorporating relativistically-propagating shocks, and illustrate how the 4.8, 8, and 14
Externí odkaz:
http://arxiv.org/abs/1609.06332
We analyze the shock-in-jet models for the gamma-ray flaring blazars 0420-014, OJ 287, and 1156+295 presented in Aller et al. (2014, Paper I), quantifying how well the modeling constrains internal properties of the flow (low energy spectral cutoff, p
Externí odkaz:
http://arxiv.org/abs/1412.2625
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