Pulsars, transients and relativistic astrophysics

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Evidence that particle acceleration in hotspots of FR II galaxies is not constrained by synchrotron cooling

Nuclear and Particle Physics Proceedings 297-299 (2018) 242-248

Authors:

Anabella Araudo, Anthony R BELL, Katherine BLUNDELL

Abstract:

© 2018 We study the hotspots of powerful radiogalaxies, where electrons accelerated at the jet termination shock emit synchrotron radiation. The turnover of the synchrotron spectrum is typically observed between infrared and optical frequencies, indicating that the maximum energy of non-thermal electrons accelerated at the shock is ≲ TeV for a canonical magnetic field of ∼100 μG. We show that this maximum energy cannot be constrained by synchrotron losses as usually assumed, unless the jet density is unreasonably large and most of the jet upstream energy goes to non-thermal particles. We test this result by considering a sample of hotspots observed at radio, infrared and optical wavelengths.
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Revival of the Magnetar PSR J1622-4950: Observations with MeerKAT, Parkes, XMM-Newton, Swift, Chandra, and NuSTAR

ASTROPHYSICAL JOURNAL 856:2 (2018) ARTN 180

Authors:

F Camilo, P Scholz, M Serylak, S Buchner, M Merryfield, VM Kaspi, RF Archibald, M Bailes, A Jameson, W van Straten, J Sarkissian, JE Reynolds, S Johnston, G Hobbs, TD Abbott, RM Adam, GB Adams, T Alberts, R Andreas, KMB Asad, DE Baker, T Baloyi, EF Bauermeister, T Baxana, TGH Bennett, G Bernardi, D Booisen, RS Booth, DH Bothar, L Boyana, LRS Brederode, JP Burger, T Cheetham, J Conradie, JP Conradie, DB Davidson, G De Bruin, B de Swardt, C de Villiers, DIL de Villiers, MS de Villiers, W de Villiers, C De Waal, MA Dikgale, G du Toit, LJ du Toit, SWP Esterhuysel, B Fanaroff, S Fataari, AR Foley, G Foster, D Fourier, R Gamatham, T Gatsi, R Geschke, S Goedhart, TL Grobler, SC Gumede, MJ Hlakola, A Hokwana, DH Hoorn, D Horn, J Horrell, B Hugo, A Isaacson, O Jacobs, JPJ van Rensburg, JL Jonas, B Jordaan, A Joubert, F Joubert, GIG Jozsa, R Julie, CC Julius, F Kapp, A Karastergiou, F Karels, M Kariseb, R Karuppusamy, V Kasper, EC Knox-Davies, D Koch, PPA Kotze, A Krebs, N Krick, H Kriel, T Kusel, S Lamoor, R Lehmensiek, D Liebenberg, I Liebenberg, RT Lord, B Lunsky, N Mabombo, T Macdonald, P Macfarlane, K Madisa, L Mafhungo, LG Magnus, C Magozore, O Mahgoub, JPL Main, S Makhathini, JA Malan, P Malgas, JR Manley, M Manzini, L Marais, N Marais, SJ Marais, M Maree, A Martens, SD Matshawule, N Matthysen, T Mauch, LD Mc Nally, B Merry, RP Millenaar, C Mjikelo, N Mikhabela, N Mnyandu, IT Moeng, OJ Mokone, TE Monama, K Montshiwa, V Moss, M Mphego, W New, B Ngcebetsha, K Ngoasheng, H Niehaus, P Ntuli, A Nzama, F Obies, M Obrocka, MT Ockards, C Olyn, N Oozeer, AJ Otto, Y Padayachee, S Passmoor, AA Patel, S Paula, A Peens-Hough, B Pholoholo, P Prozesky, S Rakoma, AJT Ramaila, I Rammala, ZR Ramudzuli, M Rasivhaga, S Ratcliffe, HC Reader, R Renil, L Richter, A Robyntjies, D Rosekrans, A Rust, S Salle, N Sambu, CTG Schollar, L Schwardt, S Seranyane, G Sethosa, C Sharper, R Siebrits, SK Sirothia, MJ Slabber, O Smirnov, S Smith, L Sofeya, N Songqumase, R Spann, B Stappers, D Steyn, TJ Steyn, R Strong, A Struthers, C Stuart, P Sunnylall, PS Swart, B Taljaard, C Tasse, G Taylor, IP Theron, V Thondikulam, K Thorat, A Tiplady, O Toruvanda, J van Aardt, T van Balla, L van den Heever, A van der Byl, C van der Merwe, P van der Merwe, PC van Niekerk, R van Rooyen, JP van Staden, V van Tonder, R van Wyk, I Wait, AL Walker, B Wallace, M Welz, LP Williams, B Xaia, N Young, S Zitha
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SNe 2013K and 2013am: observed and physical properties of two slow, normal Type IIP events

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 475:2 (2018) 1937-1959

Authors:

L Tomasella, E Cappellaro, ML Pumo, A Jerkstrand, S Benetti, N Elias-Rosa, M Fraser, C Inserra, A Pastorello, M Turatto, JP Anderson, L Galbany, CP Gutiérrez, E Kankare, G Pignata, G Terreran, S Valenti, C Barbarino, FE Bauer, MT Botticella, T-W Chen, A Gal-Yam, A Harutyunyan, DA Howell, K Maguire, A Morales Garoffolo, P Ochner, SJ Smartt, S Schulze, DR Young, L Zampieri
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LOFAR 150-MHz observations of SS 433 and W 50

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 475:4 (2018) 5360-5377

Authors:

JW Broderick, RP Fender, JCA Miller-Jones, SA Trushkin, AJ Stewart, GE Anderson, TD Staley, KM Blundell, M Pietka, S Markoff, A Rowlinson, JD Swinbank, AJ van der Horst, ME Bell, RP Breton, D Carbone, S Corbel, J Eisloeffel, H Falcke, J-M Griessmeier, JWT Hessels, VI Kondratiev, CJ Law, GJ Molenaar, M Serylak, BW Stappers, J van Leeuwen, RAMJ Wijers, R Wijnands, MW Wise, P Zarka
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RFI flagging implications for short-duration transients

Astronomy and Computing Elsevier 23 (2018) 103-114

Authors:

Y Cendes, P Prasad, A Rowlinson, RAMJ Wijers, JD Swinbank, CJ Law, AJ van der Horst, D Carbone, JW Broderick, TD Staley, AJ Stewart, F Huizinga, G Molenaar, A Alexov, ME Bell, T Coenen, S Corbel, J Eislöffel, R Fender, J-M Grießmeier, P Jonker, M Kramer, M Kuniyoshi, M Pietka, B Stappers, M Wise, P Zarka
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