Gamma-ray astronomy

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Probing the Bright Radio Flare and Afterglow of GRB 130427A with the Arcminute Microkelvin Imager

(2014)

Authors:

GE Anderson, AJ van der Horst, TD Staley, RP Fender, RAMJ Wijers, AMM Scaife, C Rumsey, DJ Titterington, A Rowlinson, RDE Saunders
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A Link Between X-ray Emission Lines and Radio Jets in 4U 1630-47?

(2014)

Authors:

Joseph Neilsen, Mickael Coriat, Rob Fender, Julia C Lee, Gabriele Ponti, Tasso Tzioumis, Phil Edwards, Jess W Broderick
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Observational characteristics of accretion onto black holes II: environment and feedback

Cambridge University Press (CUP) (2014) 227-252
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Discovery of Carbon Radio Recombination Lines in absorption towards Cygnus~A

(2014)

Authors:

JBR Oonk, RJ van Weeren, F Salgado, LK Morabito, AGGM Tielens, HJA Rottgering, A Asgekar, GJ White, A Alexov, J Anderson, IM Avruch, F Batejat, R Beck, ME Bell, I van Bemmel, MJ Bentum, G Bernardi, P Best, A Bonafede, F Breitling, M Brentjens, J Broderick, M Brueggen, HR Butcher, B Ciardi, JE Conway, A Corstanje, F de Gasperin, E de Geus, M de Vos, S Duscha, J Eisloeffel, D Engels, J van Enst, H Falcke, RA Fallows, R Fender, C Ferrari, W Frieswijk, MA Garrett, J Griessmeier, JP Hamaker, TE Hassall, G Heald, JWT Hessels, M Hoeft, A Horneffer, A van der Horst, M Iacobelli, NJ Jackson, E Juette, A Karastergiou, W Klijn, J Kohler, VI Kondratiev, M Kramer, M Kuniyoshi, G Kuper, J van Leeuwen, P Maat, G Macario, G Mann, S Markoff, JP McKean, M Mevius, JCA Miller-Jones, JD Mol, DD Mulcahy, H Munk, MJ Norden, E Orru, H Paas, M Pandey-Pommier, VN Pandey, R Pizzo, AG Polatidis, W Reich, AMM Scaife, A Schoenmakers, D Schwarz, A Shulevski, J Sluman, O Smirnov, C Sobey, BW Stappers, M Steinmetz, J Swinbank, M Tagger, Y Tang, C Tasse, S ter Veen, S Thoudam, C Toribio, R van Nieuwpoort, R Vermeulen, C Vocks, C Vogt, RAMJ Wijers, MW Wise, O Wucknitz, S Yatawatta, P Zarka, A Zensus
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Evidence of an asteroid encountering a pulsar

Astrophysical Journal Letters 780:2 (2014)

Authors:

PR Brook, A Karastergiou, S Buchner, SJ Roberts, MJ Keith, S Johnston, RM Shannon

Abstract:

Debris disks and asteroid belts are expected to form around young pulsars due to fallback material from their original supernova explosions. Disk material may migrate inward and interact with a pulsar's magnetosphere, causing changes in torque and emission. Long-term monitoring of PSR J0738-4042 reveals both effects. The pulse shape changes multiple times between 1988 and 2012. The torque, inferred via the derivative of the rotational period, changes abruptly from 2005 September. This change is accompanied by an emergent radio component that drifts with respect to the rest of the pulse. No known intrinsic pulsar processes can explain these timing and radio emission signatures. The data lead us to postulate that we are witnessing an encounter with an asteroid or in-falling debris from a disk. © 2014. The American Astronomical Society. All rights reserved.
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