Zobrazeno 1 - 10
of 61
pro vyhledávání: '"Foteini Oikonomou"'
Publikováno v:
The Astrophysical Journal, Vol 954, Iss 2, p 194 (2023)
Gamma-ray flares of blazars may be accompanied by high-energy neutrinos due to interactions of high-energy cosmic rays in the jet with photons, as suggested by the detection of the high-energy neutrino IceCube-170922A during a major gamma-ray flare f
Externí odkaz:
https://doaj.org/article/54b8d98fb26e4b0e966b23510109fbc8
Autor:
Rafael Alves Batista, Jonathan Biteau, Mauricio Bustamante, Klaus Dolag, Ralph Engel, Ke Fang, Karl-Heinz Kampert, Dmitriy Kostunin, Miguel Mostafa, Kohta Murase, Foteini Oikonomou, Angela V. Olinto, Mikhail I. Panasyuk, Guenter Sigl, Andrew M. Taylor, Michael Unger
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 6 (2019)
We review open questions and prospects for progress in ultrahigh-energy cosmic ray (UHECR) research, based on a series of discussions that took place during the “The High-Energy Universe: Gamma-Ray, Neutrino, and Cosmic-ray Astronomy” MIAPP works
Externí odkaz:
https://doaj.org/article/cfbc7ef3066b4d69b69fcdead29c522b
Publikováno v:
Nature Reviews Physics. 4:697-712
The recent discovery of high-energy astrophysical neutrinos and first hints of coincident electromagnetic and neutrino emission herald the beginning of the era of multi-messenger astronomy. Due to their high power, transient sources are expected to s
Autor:
Ioannis Moutsinas, Antonis Kalkanof, John Mavridis, Vassilis Zafeiris, Foteini Oikonomou, Georgios Tziokas, Kostas Themelis, Katerina Kyriakou, Christos Theologou, Argyris Serafeim, Apostolos Apostolaras, Persefoni Maletsika, George D. Nanos, Thanasis Korakis
Publikováno v:
2022 Global Information Infrastructure and Networking Symposium (GIIS).
Publikováno v:
The Astrophysical Journal (ApJ)
Multiwavelength observations indicate that some starburst galaxies show a dominant nonthermal contribution from their central region. These active galactic nuclei (AGN)-starburst composites are of special interest, as both phenomena on their own are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5b92661775c91058c58a000e59b70fb8
http://arxiv.org/abs/2207.00102
http://arxiv.org/abs/2207.00102
Publikováno v:
EPJ Web of Conferences. 283:04012
Astrophysical candidates for the sources of ultra-high-energy cosmic rays (UHECRs) exhibit a large diversity in terms of their properties relevant for the acceleration of charged particles, such as luminosity, Lorentz factor, size and magnetic field.
Autor:
Matthias Huber, Lisa Johanna Schumacher, Matteo Agostini, Mauricio Bustamante, Elisa Resconi, Foteini Oikonomou
Publikováno v:
Schumacher, L, Huber, M, Agostini, M, Bustamante, M, Oikonomou, F & Resconi, E 2021, ' PLEνM : A global and distributed monitoring system of high-energy astrophysical neutrinos ', P o S-Proceedings of Science, vol. 395, 1185 . https://doi.org/10.22323/1.395.1185
High-energy astrophysical neutrinos, discovered by IceCube, are now regularly observed, albeit at a low rate due to their low flux. As a result, open questions about high-energy neutrino astrophysics and particle physics remain limited by statistics
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0c387b58011229ec012046a6934fce66
https://curis.ku.dk/portal/da/publications/plem(b8098812-04fc-4036-a371-e76c8ff828dc).html
https://curis.ku.dk/portal/da/publications/plem(b8098812-04fc-4036-a371-e76c8ff828dc).html
Autor:
Foteini Oikonomou, Kohta Murase, Marcos Santander, A. Tohuvavohu, Maria Petropoulou, S. Buson, Georgios Vasilopoulos
On July 30th, 2019 IceCube detected a high-energy astrophysical muon neutrino candidate, IC-190730A, with a $67\%$ probability of astrophysical origin. The flat spectrum radio quasar (FSRQ) PKS 1502+106 is in the error circle of the neutrino. Motivat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c4a3dc94098b703dd8e641169daed567
http://arxiv.org/abs/2107.11437
http://arxiv.org/abs/2107.11437
Autor:
Matteo Cerruti, Michael Kreter, Maria Petropoulou, Annika Rudolph, Foteini Oikonomou, Markus Böttcher, Stavros Dimitrakoudis, Anton Dmytriev, Shan Gao, Susumu Inoue, Apostolos Mastichiadis, Kohta Murase, Anita Reimer, Joshua Robinson, Xavier Rodrigues, Walter Winter, Andreas Zech, Natalia Żywucka
Publikováno v:
PoS
37th International Cosmic Ray Conference
37th International Cosmic Ray Conference, Jul 2021, Berlin, Germany. pp.979, ⟨10.22323/1.395.0979⟩
37th International Cosmic Ray Conference
37th International Cosmic Ray Conference, Jul 2021, Berlin, Germany. pp.979, ⟨10.22323/1.395.0979⟩
Blazar hadronic models have been developed in the past decades as an alternative to leptonic ones. In hadronic models the gamma-ray emission is associated with synchrotron emission by protons, and/or secondary leptons produced in proton-photon intera
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bb5dbae77bc89f6f92b05d2c8215d46b
http://arxiv.org/abs/2107.06377
http://arxiv.org/abs/2107.06377
Publikováno v:
Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021).
Blazars are a class of active galactic nuclei which host relativistic jets oriented close to the observer's line of sight. Blazars have very complex variability properties. Flares, namely flux variations around the mean value with a well-defined shap