Zobrazeno 1 - 10
of 1 564
pro vyhledávání: '"Anderson, J. M."'
Autor:
Susarla, S. C., Chalumeau, A., Tiburzi, C., Keane, E. F., Verbiest, J. P. W., Hazboun, J. S., Krishnakumar, M. A., Iraci, F., Shaifullah, G. M., Golden, A., Nielsen, A. S. Bak, Donner, J., Grießmeier, J. M., Keith, M. J., Osłowski, S., Porayko, N. K., Serylak, M., Anderson, J. M., Brüggen, M., Ciardi, B., Dettmar, R. J., Hoeft, M., Künsemöller, J., Schwarz, D., Vocks, C.
High-precision pulsar timing is highly dependent on precise and accurate modeling of any effects that impact the data. It was shown that commonly used Solar Wind models do not accurately account for variability in the amplitude of the Solar wind on b
Externí odkaz:
http://arxiv.org/abs/2409.09838
Autor:
Savolainen, T., Giovannini, G., Kovalev, Y. Y., Perucho, M., Anderson, J. M., Bruni, G., Edwards, P. G., Fuentes, A., Giroletti, M., Gómez, J. L., Hada, K., Lee, S. S., Lisakov, M. M., Lobanov, A. P., López-Miralles, J., Orienti, M., Petrov, L., Plavin, A. V., Sohn, B. W., Sokolovsky, K. V., Voitsik, P. A., Zensus, J. A.
Publikováno v:
A&A 676, A114 (2023)
We present RadioAstron space-based very long baseline interferometry (VLBI) observations of the nearby radio galaxy 3C84 (NGC1275) at the centre of the Perseus cluster. The observations were carried out on September 21-22, 2013 and involved a global
Externí odkaz:
http://arxiv.org/abs/2111.04481
Autor:
Morabito, L. K., Jackson, N. J., Mooney, S., Sweijen, F., Badole, S., Kukreti, P., Venkattu, D., Groeneveld, C., Kappes, A., Bonnassieux, E., Drabent, A., Iacobelli, M., Croston, J. H., Best, P. N., Bondi, M., Callingham, J. R., Conway, J. E., Deller, A. T., Hardcastle, M. J., McKean, J. P., Miley, G. K., Moldon, J., Röttgering, H. J. A., Tasse, C., Shimwell, T. W., van Weeren, R. J., Anderson, J. M., Asgekar, A., Avruch, I. M., van Bemmel, I. M., Bentum, M. J., Bonafede, A., Brouw, W. N., Butcher, H. R., Ciardi, B., Corstanje, A., Coolen, A., Damstra, S., de Gasperin, F., Duscha, S., Eislöffel, J., Engels, D., Falcke, H., Garrett, M. A., Griessmeier, J., Gunst, A. W., van Haarlem, M. P., Hoeft, M., van der Horst, A. J., Jütte, E., Kadler, M., Koopmans, L. V. E., Krankowski, A., Mann, G., Nelles, A., Oonk, J. B. R., Orru, E., Paas, H., Pandey, V. N., Pizzo, R. F., Pandey-Pommier, M., Reich, W., Rothkaehl, H., Ruiter, M., Schwarz, D. J., Shulevski, A., Soida, M., Tagger, M., Vocks, C., Wijers, R. A. M. J., Wijnholds, S. J., Wucknitz, O., Zarka, P., Zucca, P.
Publikováno v:
A&A 658, A1 (2022)
[abridged] The International LOFAR Telescope is an interferometer with stations spread across Europe. With baselines of up to ~2,000 km, LOFAR has the unique capability of achieving sub-arcsecond resolution at frequencies below 200 MHz, although this
Externí odkaz:
http://arxiv.org/abs/2108.07283
Autor:
Bruni, G., Gómez, J. L., Vega-García, L., Lobanov, A. P., Fuentes, A., Savolainen, T., Kovalev, Y. Y., Perucho, M., Martí, J. -M., Anderson, J. M., Edwards, P. G., Gurvits, L. I., Lisakov, M. M., Pushkarev, A. B., Sokolovsky, K. V., Zensus, J. A.
Publikováno v:
A&A 654, A27 (2021)
We present Space-VLBI RadioAstron observations at 1.6 GHz and 4.8 GHz of the flat spectrum radio quasar 3C 273, with detections on baselines up to 4.5 and 3.3 Earth Diameters, respectively. Achieving the best angular resolution at 1.6 GHz to date, we
Externí odkaz:
http://arxiv.org/abs/2101.07324
Autor:
Tiburzi, C., Shaifullah, G. M., Bassa, C. G., Zucca, P., Verbiest, J. P. W., Porayko, N. K., van der Wateren, E., Fallows, R. A., Main, R. A., Janssen, G. H., Anderson, J. M., Nielsen, A-. S. Bak, Donner, J. Y., Keane, E. F., Künsemöller, J., Osłowski, S., Grießmeier, J-. M., Serylak, M., Brüggen, M., Ciardi, B., Dettmar, R. -J., Hoeft, M., Kramer, M., Mann, G., Vocks, C.
Publikováno v:
A&A 647, A84 (2021)
High-precision pulsar timing requires accurate corrections for dispersive delays of radio waves, parametrized by the dispersion measure (DM), particularly if these delays are variable in time. In a previous paper we studied the Solar-wind (SW) models
Externí odkaz:
http://arxiv.org/abs/2012.11726
Autor:
Donner, J. Y., Verbiest, J. P. W., Tiburzi, C., Osłowski, S., Künsemöller, J., Nielsen, A. -S. Bak, Grießmeier, J. -M., Serylak, M., Kramer, M., Anderson, J. M., Wucknitz, O., Keane, E., Kondratiev, V., Sobey, C., McKee, J. W., Bilous, A. V., Breton, R. P., Brüggen, M., Ciardi, B., Hoeft, M., van Leeuwen, J., Vocks, C.
Publikováno v:
A&A 644, A153 (2020)
Radio pulses from pulsars are affected by plasma dispersion, which results in a frequency-dependent propagation delay. Variations in the magnitude of this effect lead to an additional source of red noise in pulsar timing experiments, including pulsar
Externí odkaz:
http://arxiv.org/abs/2011.13742
Autor:
Broderick, J. W., Shimwell, T. W., Gourdji, K., Rowlinson, A., Nissanke, S., Hotokezaka, K., Jonker, P. G., Tasse, C., Hardcastle, M. J., Oonk, J. B. R., Fender, R. P., Wijers, R. A. M. J., Shulevski, A., Stewart, A. J., ter Veen, S., Moss, V. A., van der Wiel, M. H. D., Nichols, D. A., Piette, A., Bell, M. E., Carbone, D., Corbel, S., Eislöffel, J., Grießmeier, J. -M., Keane, E. F., Law, C. J., Muñoz-Darias, T., Pietka, M., Serylak, M., van der Horst, A. J., van Leeuwen, J., Wijnands, R., Zarka, P., Anderson, J. M., Bentum, M. J., Blaauw, R., Brouw, W. N., Brüggen, M., Ciardi, B., de Vos, M., Duscha, S., Fallows, R. A., Franzen, T. M. O., Garrett, M. A., Gunst, A. W., Hoeft, M., Hörandel, J. R., Iacobelli, M., Jütte, E., Koopmans, L. V. E., Krankowski, A., Maat, P., Mann, G., Mulder, H., Nelles, A., Paas, H., Pandey-Pommier, M., Pekal, R., Reich, W., Röttgering, H. J. A., Schwarz, D. J., Smirnov, O., Soida, M., Toribio, M. C., van Haarlem, M. P., van Weeren, R. J., Vocks, C., Wucknitz, O., Zucca, P.
We present low-radio-frequency follow-up observations of AT 2017gfo, the electromagnetic counterpart of GW170817, which was the first binary neutron star merger to be detected by Advanced LIGO-Virgo. These data, with a central frequency of 144 MHz, w
Externí odkaz:
http://arxiv.org/abs/2004.01726
Autor:
Vega-García, L., Lobanov, A. P., Perucho, M., Bruni, G., Ros, E., Anderson, J. M., Agudo, I., Davis, R., Gómez, J. L., Kovalev, Y. Y., Krichbaum, T. P., Lisakov, M., Savolainen, T., Zensus, J. A.
Publikováno v:
A&A 641 (2020) A40
Detailed studies of relativistic jets in active galactic nuclei (AGN) require high-fidelity imaging at the highest possible resolution. This can be achieved using very long baseline interferometry (VLBI) at radio frequencies, combining worldwide (glo
Externí odkaz:
http://arxiv.org/abs/1912.00925