Muons in air showers at the Pierre Auger Observatory: Measurement of atmospheric production depth

Physical Review D American Physical Society (APS) 90:1 (2014) 012012

Authors:

A Aab, P Abreu, M Aglietta, M Ahlers, EJ Ahn, I Al Samarai, IFM Albuquerque, I Allekotte, J Allen, P Allison, A Almela, J Alvarez Castillo, J Alvarez-Muñiz, R Alves Batista, M Ambrosio, A Aminaei, L Anchordoqui, S Andringa, C Aramo, F Arqueros, H Asorey, P Assis, J Aublin, M Ave, M Avenier, G Avila, AM Badescu, KB Barber, J Bäuml, C Baus, JJ Beatty, KH Becker, JA Bellido, C Berat, X Bertou, PL Biermann, P Billoir, F Blanco, M Blanco, C Bleve, H Blümer, M Boháčová, D Boncioli, C Bonifazi, R Bonino, N Borodai, J Brack, I Brancus, P Brogueira, WC Brown, P Buchholz, A Bueno, M Buscemi, KS Caballero-Mora, B Caccianiga, L Caccianiga, M Candusso, L Caramete, R Caruso, A Castellina, G Cataldi, L Cazon, R Cester, AG Chavez, SH Cheng, A Chiavassa, JA Chinellato, J Chudoba, M Cilmo, RW Clay, G Cocciolo, R Colalillo, L Collica, MR Coluccia, R Conceição, F Contreras, MJ Cooper, S Coutu, CE Covault, A Criss, J Cronin, A Curutiu, R Dallier, B Daniel, S Dasso, K Daumiller, BR Dawson, RM de Almeida, M De Domenico, SJ de Jong, JRT de Mello Neto, I De Mitri, J de Oliveira, V de Souza, L del Peral, O Deligny, H Dembinski, N Dhital, C Di Giulio, A Di Matteo, JC Diaz, ML Díaz Castro, PN Diep, F Diogo, C Dobrigkeit, W Docters, JC D’Olivo, PN Dong, A Dorofeev, Q Dorosti Hasankiadeh, MT Dova, J Ebr, R Engel, M Erdmann, M Erfani, CO Escobar, J Espadanal, A Etchegoyen, P Facal San Luis, H Falcke, K Fang, G Farrar, AC Fauth, N Fazzini, AP Ferguson, M Fernandes, B Fick, JM Figueira, A Filevich, A Filipčič, BD Fox, O Fratu, U Fröhlich, B Fuchs, T Fuji, R Gaior, B García, ST Garcia Roca, D Garcia-Gamez, D Garcia-Pinto, G Garilli, A Gascon Bravo, F Gate, H Gemmeke, PL Ghia, U Giaccari, M Giammarchi, M Giller, C Glaser, H Glass, F Gomez Albarracin, M Gómez Berisso, PF Gómez Vitale, P Gonçalves, JG Gonzalez, B Gookin, A Gorgi, P Gorham, P Gouffon, S Grebe, N Griffith, AF Grillo, TD Grubb, Y Guardincerri, F Guarino, GP Guedes, P Hansen, D Harari, TA Harrison, JL Harton, A Haungs, T Hebbeker, D Heck, P Heimann, AE Herve, GC Hill, C Hojvat, N Hollon, E Holt, P Homola, JR Hörandel, P Horvath, M Hrabovský, D Huber, T Huege, A Insolia, PG Isar, K Islo, I Jandt, S Jansen, C Jarne, M Josebachuili, A Kääpä, O Kambeitz, KH Kampert, P Kasper, I Katkov, B Kégl, B Keilhauer, A Keivani, E Kemp, RM Kieckhafer, HO Klages, M Kleifges, J Kleinfeller, R Krause, N Krohm, O Krömer, D Kruppke-Hansen, D Kuempel, N Kunka, G La Rosa, D LaHurd, L Latronico, R Lauer, M Lauscher, P Lautridou, S Le Coz, MSAB Leão, D Lebrun, P Lebrun, MA Leigui de Oliveira, A Letessier-Selvon, I Lhenry-Yvon, K Link, R López, A Lopez Agüera, K Louedec, J Lozano Bahilo, L Lu, A Lucero, M Ludwig, H Lyberis, MC Maccarone, M Malacari, S Maldera, J Maller, D Mandat, P Mantsch, AG Mariazzi, V Marin, IC Mariş, G Marsella, D Martello, L Martin, H Martinez, O Martínez Bravo, D Martraire, JJ Masías Meza, HJ Mathes, S Mathys, AJ Matthews, J Matthews, G Matthiae, D Maurel, D Maurizio, E Mayotte, PO Mazur, C Medina, G Medina-Tanco, M Melissas, D Melo, E Menichetti, A Menshikov, S Messina, R Meyhandan, S Mićanović, MI Micheletti, L Middendorf, IA Minaya, L Miramonti, B Mitrica, L Molina-Bueno, S Mollerach, M Monasor, D Monnier Ragaigne, F Montanet, C Morello, JC Moreno, M Mostafá, CA Moura, MA Muller, G Müller, M Münchmeyer, R Mussa, G Navarra, S Navas, P Necesal, L Nellen, A Nelles, J Neuser, M Niechciol, L Niemietz, T Niggemann, D Nitz, D Nosek, V Novotny, L Nožka, L Ochilo, A Olinto, M Oliveira, M Ortiz, N Pacheco, D Pakk Selmi-Dei, M Palatka, J Pallotta, N Palmieri, P Papenbreer, G Parente, A Parra, S Pastor, T Paul, M Pech, J Pȩkala, R Pelayo, IM Pepe, L Perrone, R Pesce, E Petermann, C Peters, S Petrera, A Petrolini, Y Petrov, R Piegaia, T Pierog, P Pieroni, M Pimenta, V Pirronello, M Platino, M Plum, A Porcelli, C Porowski, RR Prado, P Privitera, M Prouza, V Purrello, EJ Quel, S Querchfeld, S Quinn, J Rautenberg, O Ravel, D Ravignani, B Revenu, J Ridky, S Riggi, M Risse, P Ristori, V Rizi, J Roberts, W Rodrigues de Carvalho, I Rodriguez Cabo, G Rodriguez Fernandez, J Rodriguez Rojo, MD Rodríguez-Frías, G Ros, J Rosado, T Rossler, M Roth, E Roulet, AC Rovero, C Rühle, SJ Saffi, A Saftoiu, F Salamida, H Salazar, A Saleh, F Salesa Greus, G Salina, F Sánchez, P Sanchez-Lucas, CE Santo, E Santos, EM Santos, F Sarazin, B Sarkar, R Sarmento, R Sato, N Scharf, V Scherini, H Schieler, P Schiffer, A Schmidt, O Scholten, H Schoorlemmer, P Schovánek, A Schulz, J Schulz, SJ Sciutto, A Segreto, M Settimo, A Shadkam, RC Shellard, I Sidelnik, G Sigl, O Sima, A Śmiałkowski, R Šmída, GR Snow, P Sommers, J Sorokin, R Squartini, YN Srivastava, S Stanič, J Stapleton, J Stasielak, M Stephan, A Stutz, F Suarez, T Suomijärvi, AD Supanitsky, MS Sutherland, J Swain, Z Szadkowski, M Szuba, OA Taborda, A Tapia, M Tartare, NT Thao, VM Theodoro, J Tiffenberg, C Timmermans, CJ Todero Peixoto, G Toma, L Tomankova, B Tomé, A Tonachini, G Torralba Elipe, D Torres Machado, P Travnicek, E Trovato, M Tueros, R Ulrich, M Unger, M Urban, JF Valdés Galicia, I Valiño, L Valore, G van Aar, AM van den Berg, S van Velzen, A van Vliet, E Varela, B Vargas Cárdenas, G Varner, JR Vázquez, RA Vázquez, D Veberič, V Verzi, J Vicha, M Videla, L Villaseñor, B Vlcek, S Vorobiov, H Wahlberg, O Wainberg, D Walz, AA Watson, M Weber, K Weidenhaupt, A Weindl, F Werner, BJ Whelan, A Widom, L Wiencke, B Wilczyńska, H Wilczyński, M Will, C Williams, T Winchen, D Wittkowski, B Wundheiler, S Wykes, T Yamamoto, T Yapici, P Younk, G Yuan, A Yushkov, B Zamorano, E Zas, D Zavrtanik, M Zavrtanik, I Zaw, A Zepeda, J Zhou, Y Zhu, M Zimbres Silva, M Ziolkowski

A close-pair binary in a distant triple supermassive black hole system.

Nature 511:7507 (2014) 57-60

Authors:

RP Deane, Z Paragi, MJ Jarvis, M Coriat, G Bernardi, RP Fender, S Frey, I Heywood, H-R Klöckner, K Grainge, C Rumsey

Abstract:

Galaxies are believed to evolve through merging, which should lead to some hosting multiple supermassive black holes. There are four known triple black hole systems, with the closest black hole pair being 2.4 kiloparsecs apart (the third component in this system is at 3 kiloparsecs), which is far from the gravitational sphere of influence (about 100 parsecs for a black hole with mass one billion times that of the Sun). Previous searches for compact black hole systems concluded that they were rare, with the tightest binary system having a separation of 7 parsecs (ref. 10). Here we report observations of a triple black hole system at redshift z = 0.39, with the closest pair separated by about 140 parsecs and significantly more distant from Earth than any other known binary of comparable orbital separation. The effect of the tight pair is to introduce a rotationally symmetric helical modulation on the structure of the large-scale radio jets, which provides a useful way to search for other tight pairs without needing extremely high resolution observations. As we found this tight pair after searching only six galaxies, we conclude that tight pairs are more common than hitherto believed, which is an important observational constraint for low-frequency gravitational wave experiments.

LOFAR Sparse Image Reconstruction

(2014)

Authors:

H Garsden, JN Girard, JL Starck, S Corbel, C Tasse, A Woiselle, JP McKean, AS van Amesfoort, J Anderson, IM Avruch, R Beck, MJ Bentum, P Best, F Breitling, J Broderick, M Brüggen, HR Butcher, B Ciardi, F de Gasperin, E de Geus, M de Vos, S Duscha, J Eislöffel, D Engels, H Falcke, RA Fallows, R Fender, C Ferrari, W Frieswijk, MA Garrett, J Griessmeier, AW Gunst, TE Hassall, G Heald, M Hoeft, J Hörandel, A van der Horst, E Juette, A Karastergiou, VI Kondratiev, M Kramer, M Kuniyoshi, G Kuper, G Mann, S Markoff, R McFadden, D McKay-Bukowski, DD Mulcahy, H Munk, MJ Norden, E Orru, H Paas, M Pandey-Pommier, VN Pandey, G Pietka, R Pizzo, AG Polatidis, A Renting, H Röttgering, A Rowlinson, D Schwarz, J Sluman, O Smirnov, BW Stappers, M Steinmetz, A Stewart, J Swinbank, M Tagger, Y Tang, C Tasse, S Thoudam, C Toribio, R Vermeulen, C vocks, RJ van Weeren, SJ Wijnholds, MW Wise, O Wucknitz, S Yatawatta, P Zarka, A Zensus

A close-pair binary in a distant triple supermassive black-hole system

(2014)

Authors:

RP Deane, Z Paragi, MJ Jarvis, M Coriat, G Bernardi, RP Fender, S Frey, I Heywood, H-R Klöckner, K Grainge, C Rumsey

Future mmVLBI Research with ALMA: A European vision

(2014)

Authors:

RPJ Tilanus, TP Krichbaum, JA Zensus, A Baudry, M Bremer, H Falcke, G Giovannini, R Laing, HJ van Langevelde, W Vlemmings, Z Abraham, J Afonso, I Agudo, A Alberdi, J Alcolea, D Altamirano, S Asadi, K Assaf, P Augusto, A-K Baczko, M Boeck, T Boller, M Bondi, F Boone, G Bourda, R Brajsa, J Brand, S Britzen, V Bujarrabal, S Cales, C Casadio, V Casasola, P Castangia, J Cernicharo, P Charlot, L Chemin, Y Clenet, F Colomer, F Combes, J Cordes, M Coriat, N Cross, F D'Ammando, D Dallacasa, J-F Desmurs, R Eatough, A Eckart, D Eisenacher, S Etoka, M Felix, R Fender, M Ferreira, E Freeland, S Frey, C Fromm, L Fuhrmann, K Gabanyi, R Galvan-Madrid, M Giroletti, C Goddi, J Gomez, E Gourgoulhon, M Gray, I di Gregorio, R Greimel, N Grosso, J Guirado, K Hada, A Hanslmeier, C Henkel, F Herpin, P Hess, J Hodgson, D Horns, E Humphreys, B Hutawarakorn Kramer, V Ilyushin, V Impellizzeri, V Ivanov, M Julião, M Kadler, E Kerins, P Klaassen, K van 't Klooster, E Kording, M Kozlov, M Kramer, A Kreikenbohm, O Kurtanidze, J Lazio, A Leite, M Leitzinger, J Lepine, S Levshakov, R Lico, M Lindqvist, E Liuzzo, A Lobanov, P Lucas, K Mannheim, J Marcaide, S Markoff, I Martí-Vidal, C Martins, N Masetti, M Massardi, K Menten, H Messias, S Migliari, A Mignano, J Miller-Jones, D Minniti, P Molaro, S Molina, A Monteiro, L Moscadelli, C Mueller, A Müller, S Muller, F Niederhofer, P Odert, H Olofsson, M Orienti, R Paladino, F Panessa, Z Paragi, T Paumard, P Pedrosa, M Pérez-Torres, G Perrin, M Perucho, D Porquet, I Prandoni, S Ransom, D Reimers, M Rejkuba, L Rezzolla, A Richards, E Ros, A Roy, A Rushton, T Savolainen, R Schulz, M Silva, G Sivakoff, R Soria-Ruiz, R Soria, M Spaans, R Spencer, B Stappers, G Surcis, A Tarchi, M Temmer, M Thompson, J Torrelles, J Truestedt, V Tudose, T Venturi, J Verbiest, J Vieira, P Vielzeuf, F Vincent, N Wex, K Wiik, T Wiklind, J Wilms, E Zackrisson, H Zechlin