Hintze Centre for Astrophysical Surveys

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LOFAR 144-MHz follow-up observations of GW170817

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 494:4 (2020) 5110-5117

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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STRIDES: a 3.9 per cent measurement of the Hubble constant from the strong lens system DES J0408−5354

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 494:4 (2020) 6072-6102

Authors:

AJ Shajib, S Birrer, T Treu, A Agnello, EJ Buckley-Geer, JHH Chan, L Christensen, C Lemon, H Lin, M Millon, J Poh, CE Rusu, D Sluse, C Spiniello, GC-F Chen, T Collett, F Courbin, CD Fassnacht, J Frieman, A Galan, D Gilman, A More, T Anguita, MW Auger, V Bonvin, R McMahon, G Meylan, KC Wong, TMC Abbott, J Annis, S Avila, K Bechtol, D Brooks, D Brout, DL Burke, A Carnero Rosell, M Carrasco Kind, J Carretero, FJ Castander, M Costanzi, LN da Costa, J De Vicente, S Desai, JP Dietrich, P Doel, A Drlica-Wagner, AE Evrard, DA Finley, B Flaugher, P Fosalba, J García-Bellido, DW Gerdes, D Gruen, RA Gruendl, J Gschwend, G Gutierrez, DL Hollowood, K Honscheid, D Huterer, DJ James, T Jeltema, E Krause, N Kuropatkin, TS Li, M Lima, N MacCrann, MAG Maia, JL Marshall, P Melchior, R Miquel, RLC Ogando, A Palmese, F Paz-Chinchón, AA Plazas, AK Romer, A Roodman, M Sako, E Sanchez, B Santiago, V Scarpine, M Schubnell, D Scolnic, S Serrano, I Sevilla-Noarbe, M Smith, M Soares-Santos, E Suchyta, G Tarle, D Thomas, AR Walker, Y Zhang
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Nature versus nurture: relic nature and environment of the most massive passive galaxies at z < 0.5

Astronomy & Astrophysics EDP Sciences 638 (2020) l11

Authors:

C Tortora, NR Napolitano, M Radovich, C Spiniello, L Hunt, N Roy, L Moscardini, D Scognamiglio, M Spavone, M Brescia, S Cavuoti, G D‘Ago, G Longo, F Bellagamba, M Maturi, M Roncarelli
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Radio afterglows of Very High Energy Gamma-ray Bursts

Proceedings of the International Astronomical Union Cambridge University Press (CUP) 16:S363 (2020) 220-223

Authors:

Lauren Rhodes, Alexander van der Horst, Rob Fender
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Relativistic X-ray jets from the black hole X-ray binary MAXI J1820+070

Astrophysical Journal Letters American Astronomical Society 895:2 (2020) L31

Authors:

Mathilde Espinasse, Stephane Corbel, Philip Kaaret, Evangelia Tremou, Giulia Migliori, Richard M Plotkin, Joe Bright, John Tomsick, Anastasios Tzioumis, Robert Fender, Jerome A Orosz, Elena Gallo, Jeroen Homan, Peter G Jonker, James CA Miller-Jones, David M Russell, Sara Motta

Abstract:

The black hole MAXI J1820+070 was discovered during its 2018 outburst and was extensively monitored across the electromagnetic spectrum. Following the detection of relativistic radio jets, we obtained four Chandra X-ray observations taken between 2018 November and 2019 June, along with radio observations conducted with the Very Large Array and MeerKAT arrays. We report the discovery of X-ray sources associated with the radio jets moving at relativistic velocities with a possible deceleration at late times. The broadband spectra of the jets are consistent with synchrotron radiation from particles accelerated up to very high energies (>10 TeV) by shocks produced by the jets interacting with the interstellar medium. The minimal internal energy estimated from the X-ray observations for the jets is ~10^41 erg, significantly larger than the energy calculated from the radio flare alone, suggesting most of the energy is possibly not radiated at small scales but released through late-time interactions.
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