Zobrazeno 1 - 10
of 334
pro vyhledávání: '"Giannios D."'
Recent advances in numerical simulations of magnetically arrested accretion onto supermassive black holes have shed light on the formation and dynamics of magnetospheric current sheets near the black hole horizon. By considering the pair magnetizatio
Externí odkaz:
http://arxiv.org/abs/2406.01211
Models invoking magnetic reconnection as the particle acceleration mechanism within relativistic jets often adopt a gradual energy dissipation profile within the jet. However, such a profile has yet to be reproduced in first-principles simulations. H
Externí odkaz:
http://arxiv.org/abs/2212.06058
Autor:
Hajela, A., Margutti, R., Bright, J. S., Alexander, K. D., Metzger, B. D., Nedora, V., Kathirgamaraju, A., Margalit, B., Radice, D., Guidorzi, C., Berger, E., MacFadyen, A., Giannios, D., Chornock, R., Heywood, I., Sironi, L., Gottlieb, O., Coppejans, D., Laskar, T., Cendes, Y., Duran, R. Barniol, Eftekhari, T., Fong, W., McDowell, A., Nicholl, M., Xie, X., Zrake, J., Bernuzzi, S., Broekgaarden, F. S., Kilpatrick, C. D., Terreran, G., Villar, V. A., Blanchard, P. K., Gomez, S., Hosseinzadeh, G., Matthews, D. J., Rastinejad, J. C.
For the first $\sim3$ years after the binary neutron star merger event GW 170817 the radio and X-ray radiation has been dominated by emission from a structured relativistic off-axis jet propagating into a low-density medium with n $< 0.01\,\rm{cm^{-3
Externí odkaz:
http://arxiv.org/abs/2104.02070
The central engine in long gamma-ray bursts (GRBs) is thought to be a compact object produced by the core collapse of massive stars, but its exact nature (black hole or millisecond magnetar) is still debatable. Although the central engine of GRB coll
Externí odkaz:
http://arxiv.org/abs/2006.07482
Publikováno v:
EPJ Web of Conferences, Vol 39, p 04003 (2012)
A transient event Swift J1644+57 is thought to be caused by the emission from a collimated relativistic jet. The jet, powered by the sudden onset of accretion onto a supermassive black hole following the tidal disruption of a star, collides with the
Externí odkaz:
https://doaj.org/article/22d1195736914d40945a7c33edf8b47f
Publikováno v:
EPJ Web of Conferences, Vol 39, p 04001 (2012)
The recent transient event Swift J1644+57 has been interpreted as resulting from a relativistic outflow, powered by the accretion of a tidally disrupted star onto a supermassive black hole. This discovery of a new class of relativistic transients ope
Externí odkaz:
https://doaj.org/article/d50b9582923e4560b913d97907e1f707
Autor:
Hajela, A., Margutti, R., Alexander, K. D., Kathirgamaraju, A., Baldeschi, A., Guidorzi, C., Giannios, D., Fong, W., Wu, Y., MacFadyen, A., Paggi, A., Berger, E., Blanchard, P. K., Chornock, R., Coppejans, D. L., Cowperthwaite, P. S., Eftekhari, T., Gomez, S., Hosseinzadeh, G., Laskar, T., Metzger, B. D., Nicholl, M., Paterson, K., Radice, D., Sironi, L., Terreran, G., Villar, V. A., Williams, P. K. G., Xie, X., Zrake, J.
We present Chandra and VLA observations of GW170817 at ~521-743 days post merger, and a homogeneous analysis of the entire Chandra data set. We find that the late-time non-thermal emission follows the expected evolution from an off-axis relativistic
Externí odkaz:
http://arxiv.org/abs/1909.06393
Autor:
Fong, Wen-fai, Blanchard, P. K., Alexander, K. D., Strader, J., Margutti, R., Hajela, A., Villar, V. A., Wu, Y., Ye, C. S., Berger, E., Chornock, R., Coppejans, D., Cowperthwaite, P. S., Eftekhari, T., Giannios, D., Guidorzi, C., Kathirgamaraju, A., Laskar, T., MacFadyen, A., Metzger, B. D., Nicholl, M., Paterson, K., Terreran, G., Sand, D. J., Sironi, L., Williams, P. K. G., Xie, X., Zrake, J.
We present a revised and complete optical afterglow light curve of the binary neutron star merger GW170817, enabled by deep Hubble Space Telescope (HST) F606W observations at $\approx\!584$ days post-merger, which provide a robust optical template. T
Externí odkaz:
http://arxiv.org/abs/1908.08046
Blazar emission models based on magnetic reconnection succeed in reproducing many observed spectral and temporal features, including the short-duration luminous flaring events. Plasmoids, a self-consistent by-product of the tearing instability in the
Externí odkaz:
http://arxiv.org/abs/1908.02764
Autor:
Ojha, R., Zhang, H., Kadler, M., Neilson, N. K., Kreter, M., McEnery, J., Buson, S., Caputo, R., Coppi, P., D'Ammando, F., De Angelis, A., Fang, K., Giannios, D., Guiriec, S., Guo, F., Kopp, J., Krauss, F., Li, H., Meyer, M., Moiseev, A., Petropoulou, M., Prescod-Weinstein, C., Rani, B., Shrader, C., Venters, T., Wadiasingh, Z.
The possible association of the blazar TXS 0506+056 with a high-energy neutrino detected by IceCube holds the tantalizing potential to answer three astrophysical questions: 1. Where do high-energy neutrinos originate? 2. Where are cosmic rays produce
Externí odkaz:
http://arxiv.org/abs/1903.05765