Gamma-ray astronomy

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Neutrino and γ-ray emission from the core of NGC1275 by magnetic reconnection: GRMHD simulations and radiative transfer/particle calculations

Proceedings of the International Astronomical Union Cambridge University Press 14:S342 (2020) 184-188

Authors:

Jc Rodríguez-Ramírez, Em De Gouveia Dal Pino, R Alves Batista

Abstract:

Very high energy (VHE) emission has been detected from the radio galaxy NGC1275, establishing it as a potential cosmic-ray (CR) accelerator and a high energy neutrino source. We here study neutrino and γ-ray emission from the core of NGC1275 simulating the interactions of CRs assumed to be accelerated by magnetic reconnection, with the accreting plasma environment. To do this, we combine (i) numerical general relativistic (GR) magneto-hydrodynamics (MHD), (ii) Monte Carlo GR leptonic radiative transfer and, (iii) Monte Carlo interaction of CRs. A leptonic emission model that reproduces the SED in the [103-1010.5] eV energy range is used as the background target for photo-pion interactions+electromagnetic cascading. CRs injected with the power-law index κ=1.3 produce an emission profile that matches the VHE tail of NGC1275. The associated neutrino flux, below the IceCube limits, peaks at ∼PeV energies. However, coming from a single source, this neutrino flux may be an over-estimation.
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Very high energy $\gamma$-ray emission from two blazars of unknown redshift and upper limits on their distance

(2020)

Authors:

HESS Collaboration, H Abdalla, R Adam, F Aharonian, F Ait Benkhali, EO Angüner, M Arakawa, C Arcaro, C Armand, T Armstrong, H Ashkar, M Backes, V Baghmanyan, V Barbosa Martins, A Barnacka, M Barnard, Y Becherini, D Berge, K Bernlöhr, M Böttcher, C Boisson, J Bolmont, S Bonnefoy, J Bregeon, M Breuhaus, F Brun, P Brun, M Bryan, M Büchele, T Bulik, T Bylund, S Caroff, A Carosi, S Casanova, T Chand, S Chandra, A Chen, G Cotter, M Curyło, ID Davids, J Davies, C Deil, J Devin, P deWilt, L Dirson, A Djannati-Ataï, A Dmytriiev, A Donath, V Doroshenko, J Dyks, K Egberts, F Eichhorn, G Emery, J-P Ernenwein, K Feijen, S Fegan, A Fiasson, G Fontaine, S Funk, M Füßling, S Gabici, YA Gallant, G Giavitto, L Giunti, D Glawion, JF Glicenstein, D Gottschall, M-H Grondin, J Hahn, M Haupt, G Hermann, JA Hinton, W Hofmann, C Hoischen, TL Holch, M Holler, M H{\"}orbe, D Horns, D Huber, H Iwasaki, M Jamrozy, D Jankowsky, F Jankowsky, A Jardin-Blicq, V Joshi, I Jung-Richardt, MA Kastendieck, K Katarzynski, M Katsuragawa, U Katz, D Khangulyan, B Khélifi, S Klepser, W Kluzniak, Nu Komin, R Konno, K Kosack, D Kostunin, M Kreter, G Lamanna, A Lemière, M Lemoine-Goumard, J-P Lenain, E Leser, C Levy, T Lohse, I Lypova, J Mackey, J Majumdar, D Malyshev, D Malyshev, V Marandon, P Marchegiani, A Marcowith, A Mares, G Martí-Devesa, R Marx, G Maurin, PJ Meintjes, R Moderski, M Mohamed, L Mohrmann, C Moore, P Morris, E Moulin, J Muller, T Murach, S Nakashima, K Nakashima, M de Naurois, H Ndiyavala, F Niederwanger, J Niemiec, L Oakes, P O'Brien, H Odaka, S Ohm, E de Ona Wilhelmi, M Ostrowski, M Panter, RD Parsons, B Peyaud, Q Piel, S Pita, V Poireau, A Priyana Noel, DA Prokhorov, H Prokoph, G Pühlhofer, M Punch, A Quirrenbach, S Raab, R Rauth, A Reimer, O Reimer, Q Remy, M Renaud, F Rieger, L Rinchiuso, C Romoli, G Rowell, B Rudak, E Ruiz-Velasco, V Sahakian, S Sailer, S Saito, DA Sanchez, A Santangelo, M Sasaki, M Scalici, F Schüssler, HM Schutte, U Schwanke, S Schwemmer, M Seglar-Arroyo, M Senniappan, AS Seyffert, N Shafi, K Shiningayamwe, R Simoni, A Sinha, H Sol, A Specovius, S Spencer, M Spir-Jacob, Ł Stawarz, R Steenkamp, C Stegmann, C Steppa, T Takahashi, T Tavernier, AM Taylor, R Terrier, D Tiziani, M Tluczykont, L Tomankova, C Trichard, M Tsirou, N Tsuji, R Tuffs, Y Uchiyama, DJ van der Walt, C van Eldik, C van Rensburg, B van Soelen, G Vasileiadis, J Veh, C Venter, P Vincent, J Vink, HJ Völk, T Vuillaume, Z Wadiasingh, SJ Wagner, J Watson, F Werner, R White, A Wierzcholska, R Yang, H Yoneda, M Zacharias, R Zanin, D Zargaryan, AA Zdziarski, A Zech, SJ Zhu, J Zorn, N Żywucka, M Cerruti
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LOFAR 144-MHz follow-up observations of GW170817

(2020)

Authors:

JW Broderick, TW Shimwell, K Gourdji, A Rowlinson, S Nissanke, K Hotokezaka, PG Jonker, C Tasse, MJ Hardcastle, JBR Oonk, RP Fender, RAMJ Wijers, A Shulevski, AJ Stewart, S ter Veen, VA Moss, MHD van der Wiel, DA Nichols, A Piette, ME Bell, D Carbone, S Corbel, J Eislöffel, J-M Grießmeier, EF Keane, CJ Law, T Muñoz-Darias, M Pietka, M Serylak, AJ van der Horst, J van Leeuwen, R Wijnands, P Zarka, JM Anderson, MJ Bentum, R Blaauw, WN Brouw, M Brüggen, B Ciardi, M de Vos, S Duscha, RA Fallows, TMO Franzen, MA Garrett, AW Gunst, M Hoeft, JR Hörandel, M Iacobelli, E Jütte, LVE Koopmans, A Krankowski, P Maat, G Mann, H Mulder, A Nelles, H Paas, M Pandey-Pommier, R Pekal, W Reich, HJA Röttgering, DJ Schwarz, O Smirnov, M Soida, MC Toribio, MP van Haarlem, RJ van Weeren, C Vocks, O Wucknitz, P Zucca
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Radio Afterglows of Very High Energy Gamma-Ray Bursts 190829A and 180720B

(2020)

Authors:

L Rhodes, AJ van der Horst, R Fender, I Monageng, GE Anderson, J Antoniadis, MF Bietenholz, M Bottcher, JS Bright, C Kouveliotou, M Kramer, SE Motta, DRA Williams, PA Woudt, .
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A radio parallax to the black hole X-ray binary MAXI J1820+070

Monthly Notices of the Royal Astronomical Society: Letters Oxford University Press (OUP) 493:1 (2020) l81-l86

Authors:

P Atri, JCA Miller-Jones, A Bahramian, RM Plotkin, AT Deller, PG Jonker, TJ Maccarone, GR Sivakoff, R Soria, D Altamirano, T Belloni, R Fender, E Koerding, D Maitra, S Markoff, S Migliari, D Russell, T Russell, CL Sarazin, AJ Tetarenko, V Tudose
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