Zobrazeno 1 - 10
of 103
pro vyhledávání: '"Apostolos Mastichiadis"'
Publikováno v:
Galaxies, Vol 7, Iss 1, p 3 (2018)
Blazars are a sub-category of radio-loud active galactic nuclei with relativistic jets pointing towards to the observer. They are well-known for their non-thermal variable emission, which practically extends over the whole electromagnetic spectrum. D
Externí odkaz:
https://doaj.org/article/6c1cf8a4323a404dae246992b4454653
Autor:
Apostolos Mastichiadis
Publikováno v:
Galaxies, Vol 4, Iss 4, p 59 (2016)
Hadronic models of blazar emission constitute an interesting alternative to the more popular leptonic ones. Using the BL Lac object Mrk 421 as a characteristic example, we present two distinct ways of modeling the spectral energy distribution of blaz
Externí odkaz:
https://doaj.org/article/84d20f7c727141f0ba0be14463b66cce
Publikováno v:
Proceedings of 7th Heidelberg International Symposium on High-Energy Gamma-Ray Astronomy — PoS(Gamma2022).
Autor:
Georgios Vasilopoulos, Charles D. Bailyn, M. Polkas, Paolo De Coppi, Apostolos Mastichiadis, C. M. Urry, Maria Petropoulou
Publikováno v:
Mon.Not.Roy.Astron.Soc.
Mon.Not.Roy.Astron.Soc., 2021, 505 (4), pp.6103-6120. ⟨10.1093/mnras/stab1618⟩
Mon.Not.Roy.Astron.Soc., 2021, 505 (4), pp.6103-6120. ⟨10.1093/mnras/stab1618⟩
Decade-long monitoring of blazars at optical and infrared (OIR) wavelengths with the Small and Moderate Aperture Research Telescope System (SMARTS) in Chile and in $\gamma$-rays with the Fermi Large Area Telescope (LAT) has enabled the systematic stu
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 505:1367-1381
A small fraction of GRBs with available data down to soft X-rays ($\sim0.5$ keV) have been shown to feature a spectral break in the low-energy part ($\sim1-10$ keV) of their prompt emission spectrum. The overall spectral shape is consistent with opti
Relativistic hadronic plasmas can become under certain conditions supercritical, abruptly and efficiently releasing the energy stored in protons through photon outbursts. Past studies have tried to relate the features of such hadronic supercriticalit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0bb1504b1b159b44bddd8449fdb9e74b
High-energy neutrinos from X-rays flares of blazars frequently observed by the Swift X-Ray Telescope
Autor:
S. I. Stathopoulos, Apostolos Mastichiadis, Georgios Vasilopoulos, P. Giommi, Paolo Padovani, Maria Petropoulou
Publikováno v:
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2021, ⟨10.1093/mnras/stab3404⟩
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2021, ⟨10.1093/mnras/stab3404⟩
Blazar flares have been suggested as ideal candidates for enhanced neutrino production. While the neutrino signal of $\gamma$-ray flares has been widely discussed, the neutrino yield of X-ray flares has received less attention. Here, we compute the p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::26c21e8cf26ec5f9e58d97e326bcf50b
https://hal.archives-ouvertes.fr/hal-03468998
https://hal.archives-ouvertes.fr/hal-03468998
Blazars are a sub-category of radio-loud active galactic nuclei with relativistic jets pointing towards the observer. They exhibit non-thermal variable emission, which practically extends over the whole electromagnetic spectrum. Despite the plethora
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dd5d3ecc6d01c0853dbdf09609380fd8
http://arxiv.org/abs/2108.02467
http://arxiv.org/abs/2108.02467
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).