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where I'd like to be ...

Prof Subir Sarkar

Professor Emeritus

Research theme

  • Particle astrophysics & cosmology
  • Fundamental particles and interactions

Sub department

  • Rudolf Peierls Centre for Theoretical Physics

Research groups

  • Particle theory
Subir.Sarkar@physics.ox.ac.uk
Telephone: 01865 (2)73962
Rudolf Peierls Centre for Theoretical Physics, room 60.12
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Brief CV
  • About
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  • IceCube@Oxford
  • Publications

IceCube

Physics World 2013 Breakthrough of the Year
IceCube at Oxford

I am a member since 2004 of the IceCube collaboration which discovered cosmic high energy neutrinos and identified some of their astrophysical sources.

IceCube @ Oxford

Contributions of the Cherenkov Telescope Array (CTA) to the 6th International Symposium on High-Energy Gamma-Ray Astronomy (Gamma 2016)

(2016)

Authors:

The CTA Consortium, :, A Abchiche, U Abeysekara, Ó Abril, F Acero, BS Acharya, C Adams, G Agnetta, F Aharonian, A Akhperjanian, A Albert, M Alcubierre, J Alfaro, R Alfaro, AJ Allafort, R Aloisio, J-P Amans, E Amato, L Ambrogi, G Ambrosi, M Ambrosio, J Anderson, M Anduze, EO Angüner, E Antolini, LA Antonelli, M Antonucci, V Antonuccio, P Antoranz, C Aramo, A Aravantinos, M Araya, C Arcaro, B Arezki, A Argan, T Armstrong, F Arqueros, L Arrabito, M Arrieta, K Asano, M Ashley, P Aubert, CB Singh, A Babic, M Backes, A Bais, S Bajtlik, C Balazs, M Balbo, D Balis, C Balkowski, O Ballester, J Ballet, A Balzer, A Bamba, R Bandiera, A Barber, C Barbier, M Barcelo, M Barkov, A Barnacka, U Barres de Almeida, JA Barrio, S Basso, D Bastieri, C Bauer, U Becciani, Y Becherini, J Becker Tjus, V Beckmann, W Bednarek, W Benbow, D Benedico Ventura, J Berdugo, D Berge, E Bernardini, MG Bernardini, S Bernhard, K Bernlöhr, B Bertucci, M-A Besel, V Beshley, N Bhatt, P Bhattacharjee, W Bhattacharyya, S Bhattachryya, B Biasuzzi, G Bicknell, C Bigongiari, A Biland, A Bilinsky, W Bilnik, B Biondo, R Bird, T Bird, E Bissaldi, M Bitossi, O Blanch, P Blasi, J Blazek, C Bockermann, C Boehm, L Bogacz, M Bogdan, M Bohacova, C Boisson, J Boix, J Bolmont, G Bonanno, A Bonardi, C Bonavolontà, P Bonifacio, F Bonnarel, G Bonnoli, J Borkowski, R Bose, Z Bosnjak, M Böttcher, J-J Bousquet, C Boutonnet, F Bouyjou, L Bowman, C Braiding, T Brantseg, S Brau-Nogué, J Bregeon, M Briggs, M Brigida, T Bringmann, W Brisken, D Bristow, R Britto, E Brocato, S Bron, P Brook, W Brooks, AM Brown, K Brügge, F Brun, P Brun, P Brun, G Brunetti, L Brunetti, P Bruno, T Buanes, N Bucciantini, G Buchholtz, J Buckley, V Bugaev, R Bühler, A Bulgarelli, T Bulik, M Burton, A Burtovoi, G Busetto, S Buson, J Buss, K Byrum, F Cadoux, J Calvo Tovar, R Cameron, F Canelli, R Canestrari, M Capalbi, M Capasso, G Capobianco, A Caproni, P Caraveo, J Cardenzana, M Cardillo, S Carius, C Carlile, A Carosi, R Carosi, E Carquín, J Carr, M Carroll, J Carter, P-H Carton, J-M Casandjian, S Casanova, S Casanova, E Cascone, M Casiraghi, A Castellina, J Castroviejo Mora, F Catalani, O Catalano, S Catalanotti, D Cauz, S Cavazzani, P Cerchiara, E Chabanne, P Chadwick, T Chaleil, C Champion, A Chatterjee, S Chaty, R Chaves, A Chen, X Chen, X Chen, K Cheng, M Chernyakova, L Chiappetti, M Chikawa, D Chinn, VR Chitnis, N Cho, A Christov, J Chudoba, M Cieślar, MA Ciocci, R Clay, S Colafrancesco, P Colin, J-M Colley, E Colombo, J Colome, S Colonges, V Conforti, V Connaughton, S Connell, J Conrad, JL Contreras, P Coppi, S Corbel, J Coridian, R Cornat, P Corona, D Corti, J Cortina, L Cossio, A Costa, H Costantini, G Cotter, B Courty, S Covino, G Covone, G Crimi, SJ Criswell, R Crocker, J Croston, J Cuadra, P Cumani, G Cusumano, P Da Vela, Ø Dale, F D'Ammando, D Dang, VT Dang, L Dangeon, M Daniel, I Davids, I Davids, B Dawson, F Dazzi, B de Aguiar Costa, A De Angelis, RF de Araujo Cardoso, V De Caprio, R de Cássia dos Anjos, G De Cesare, A De Franco, F De Frondat, EM de Gouveia Dal Pino, I de la Calle, C De Lisio, R de los Reyes Lopez, B De Lotto, A De Luca, JRT de Mello Neto, M de Naurois, E de Oña Wilhelmi, F De Palma, F De Persio, V de Souza, G Decock, J Decock, C Deil, M Del Santo, E Delagnes, G Deleglise, C Delgado, J Delgado, D della Volpe, P Deloye, M Detournay, A Dettlaff, J Devin, T Di Girolamo, C Di Giulio, A Di Paola, F Di Pierro, MA Diaz, C Díaz, C Dib, J Dick, H Dickinson, S Diebold, S Digel, J Dipold, G Disset, A Distefano, A Djannati-Ataï, M Doert, M Dohmke, A Domínguez, N Dominik, J-L Dominique, D Dominis Prester, A Donat, I Donnarumma, D Dorner, M Doro, J-L Dournaux, T Downes, K Doyle, G Drake, S Drappeau, H Drass, D Dravins, L Drury, G Dubus, L Ducci, D Dumas, K Dundas Morå, D Durand, D D'Urso, V Dwarkadas, J Dyks, M Dyrda, J Ebr, E Edy, K Egberts, P Eger, A Egorov, S Einecke, J Eisch, F Eisenkolb, C Eleftheriadis, D Elsaesser, D Elsässer, D Emmanoulopoulos, C Engelbrecht, D Engelhaupt, J-P Ernenwein, P Escarate, S Eschbach, C Espinoza, P Evans, M Fairbairn, D Falceta-Goncalves, A Falcone, V Fallah Ramazani, D Fantinel, K Farakos, C Farnier, E Farrell, G Fasola, Y Favre, E Fede, R Fedora, E Fedorova, S Fegan, D Ferenc, M Fernandez-Alonso, A Fernández-Barral, G Ferrand, O Ferreira, M Fesquet, P Fetfatzis, E Fiandrini, A Fiasson, A Filipčič, M Filipovic, D Fink, C Finley, JP Finley, A Finoguenov, V Fioretti, M Fiorini, H Fleischhack, H Flores, D Florin, C Föhr, E Fokitis, MV Fonseca, L Font, G Fontaine, B Fontes, M Fornasa, M Fornasa, A Förster, P Fortin, L Fortson, N Fouque, A Franckowiak, A Franckowiak, FJ Franco, I Freire Mota Albuquerque, L Freixas Coromina, L Fresnillo, C Fruck, M Fuessling, D Fugazza, Y Fujita, S Fukami, Y Fukazawa, T Fukuda, Y Fukui, S Funk, A Furniss, W Gäbele, S Gabici, A Gadola, D Galindo, DD Gall, Y Gallant, D Galloway, S Gallozzi, JA Galvez, S Gao, A Garcia, B Garcia, R García Gil, R Garcia López, M Garczarczyk, D Gardiol, C Gargano, F Gargano, S Garozzo, F Garrecht, L Garrido, M Garrido-Ruiz, D Gascon, J Gaskins, J Gaudemard, M Gaug, J Gaweda, B Gebhardt, M Gebyehu, N Geffroy, B Genolini, L Gerard, A Ghalumyan, A Ghedina, P Ghislain, P Giammaria, E Giannakaki, F Gianotti, S Giarrusso, G Giavitto, B Giebels, T Gieras, N Giglietto, V Gika, R Gimenes, M Giomi, P Giommi, F Giordano, G Giovannini, P Girardot, E Giro, M Giroletti, J Gironnet, A Giuliani, J-F Glicenstein, R Gnatyk, N Godinovic, P Goldoni, G Gomez, MM Gonzalez, A González, D Gora, KS Gothe, D Gotz, J Goullon, T Grabarczyk, R Graciani, J Graham, P Grandi, J Granot, G Grasseau, R Gredig, AJ Green, AM Green, T Greenshaw, I Grenier, S Griffiths, A Grillo, M-H Grondin, J Grube, M Grudzinska, J Grygorczuk, V Guarino, D Guberman, S Gunji, G Gyuk, D Hadasch, A Hagedorn, L Hagge, J Hahn, H Hakobyan, S Hara, MJ Hardcastle, T Hassan, K Hatanaka, T Haubold, A Haupt, T Hayakawa, M Hayashida, M Heller, R Heller, JC Helo, F Henault, G Henri, G Hermann, R Hermel, J Herrera Llorente, J Herrera Llorente, A Herrero, O Hervet, N Hidaka, J Hinton, W Hirai, K Hirotani, B Hnatyk, J Hoang, D Hoffmann, W Hofmann, T Holch, J Holder, S Hooper, D Horan, J Hörandel, M Hörbe, D Horns, P Horvath, J Hose, J Houles, T Hovatta, M Hrabovsky, D Hrupec, J-M Huet, M Huetten, G Hughes, D Hui, TB Humensky, M Hussein, M Iacovacci, A Ibarra, Y Ikeno, JM Illa, D Impiombato, T Inada, S Incorvaia, L Infante, Y Inome, S Inoue, T Inoue, Y Inoue, F Iocco, K Ioka, M Iori, K Ishio, K Ishio, GL Israel, Y Iwamura, C Jablonski, A Jacholkowska, J Jacquemier, M Jamrozy, P Janecek, M Janiak, D Jankowsky, F Jankowsky, P Jean, I Jegouzo, P Jenke, JJ Jimenez, M Jingo, M Jingo, L Jocou, T Jogler, CA Johnson, M Jones, M Josselin, L Journet, I Jung, P Kaaret, M Kagaya, J Kakuwa, O Kalekin, C Kalkuhl, H Kamon, R Kankanyan, A Karastergiou, K Kärcher, M Karczewski, S Karkar, P Karn, J Kasperek, H Katagiri, J Kataoka, K Katarzyński, S Kato, U Katz, N Kawanaka, L Kaye, D Kazanas, N Kelley-Hoskins, J Kersten, B Khélifi, DB Kieda, T Kihm, S Kimeswenger, S Kisaka, S Kishida, R Kissmann, S Klepser, W Kluźniak, J Knapen, J Knapp, J Knödlseder, B Koch, F Köck, J Kocot, K Kohri, K Kokkotas, K Kokkotas, D Kolitzus, N Komin, I Kominis, A Kong, Y Konno, K Kosack, G Koss, M Kossatz, G Kowal, S Koyama, J Kozioł, M Kraus, J Krause, M Krause, H Krawzcynski, F Krennrich, A Kretzschmann, P Kruger, H Kubo, V Kudryavtsev, G Kukec Mezek, M Kuklis, H Kuroda, J Kushida, A La Barbera, N La Palombara, V La Parola, G La Rosa, H Laffon, R Lahmann, M Lakicevic, K Lalik, G Lamanna, D Landriu, H Landt, RG Lang, J Lapington, P Laporte, J-P Le Fèvre, T Le Flour, P Le Sidaner, S-H Lee, WH Lee, J-P Lees, J Lefaucheur, K Leffhalm, H Leich, MA Leigui de Oliveira, D Lelas, A Lemière, M Lemoine-Goumard, J-P Lenain, R Leonard, R Leoni, L Lessio, G Leto, A Leveque, B Lieunard, M Limon, R Lindemann, E Lindfors, L Linhoff, A Liolios, A Lipniacka, H Lockart, T Lohse, E Łokas, S Lombardi, F Longo, A Lopatin, M Lopez, D Loreggia, T Louge, F Louis, M Louys, F Lucarelli, D Lucchesi, H Lüdecke, T Luigi, PL Luque-Escamilla, E Lyard, MC Maccarone, T Maccarone, TJ Maccarone, E Mach, GM Madejski, A Madonna, F Magniette, A Magniez, M Mahabir, G Maier, P Majumdar, P Majumdar, M Makariev, G Malaguti, G Malaspina, AK Mallot, A Malouf, S Maltezos, D Malyshev, A Mancilla, D Mandat, G Maneva, M Manganaro, S Mangano, P Manigot, N Mankushiyil, K Mannheim, N Maragos, D Marano, P Marchegiani, JA Marcomini, A Marcowith, M Mariotti, M Marisaldi, S Markoff, C Martens, J Martí, J-M Martin, L Martin, P Martin, G Martínez, M Martínez, O Martínez, K Martynyuk-Lototskyy, R Marx, N Masetti, P Massimino, A Mastichiadis, S Mastroianni, M Mastropietro, S Masuda, H Matsumoto, S Matsuoka, N Matthews, S Mattiazzo, G Maurin, N Maxted, N Maxted, J Maya, M Mayer, D Mazin, MN Mazziotta, L Mc Comb, N McCubbin, I McHardy, C Medina, F Mehrez, C Melioli, D Melkumyan, T Melse, S Mereghetti, M Merk, P Mertsch, J-L Meunier, T Meures, M Meyer, JL Meyrelles, A Miccichè, T Michael, J Michałowski, P Mientjes, I Mievre, A Mihailidis, J Miller, T Mineo, M Minuti, N Mirabal, F Mirabel, JM Miranda, R Mirzoyan, A Mitchell, T Mizuno, R Moderski, I Mognet, M Mohammed, R Moharana, L Mohrmann, E Molinari, P Molyneux, E Monmarthe, G Monnier, T Montaruli, C Monte, I Monteiro, D Mooney, P Moore, A Moralejo, C Morello, E Moretti, K Mori, P Morris, A Morselli, F Moscato, D Motohashi, F Mottez, Y Moudden, E Moulin, S Mueller, R Mukherjee, P Munar, M Munari, C Mundell, J Mundet, H Muraishi, K Murase, A Muronga, A Murphy, N Nagar, S Nagataki, T Nagayoshi, BK Nagesh, T Naito, D Nakajima, D Nakajima, T Nakamori, K Nakayama, J Nanni, D Naumann, P Nayman, L Nellen, R Nemmen, A Neronov, N Neyroud, T Nguyen, TT Nguyen, T Nguyen Trung, L Nicastro, J Nicolau-Kukliński, F Niederwanger, A Niedźwiecki, J Niemiec, D Nieto, M Nievas-Rosillo, A Nikolaidis, M Nikołajuk, K Nishijima, K-I Nishikawa, G Nishiyama, K Noda, K Noda, L Nogues, S Nolan, R Northrop, D Nosek, M Nöthe, B Novosyadlyj, L Nozka, F Nunio, L Oakes, P O'Brien, C Ocampo, G Occhipinti, JP Ochoa, A OFaolain de Bhroithe, R Oger, Y Ohira, M Ohishi, S Ohm, H Ohoka, N Okazaki, A Okumura, J-F Olive, D Olszowski, RA Ong, S Ono, M Orienti, R Orito, A Orlati, J Osborne, M Ostrowski, D Ottaway, N Otte, S Öttl, E Ovcharov, I Oya, A Ozieblo, M Padovani, I Pagano, S Paiano, A Paizis, J Palacio, M Palatka, J Pallotta, K Panagiotidis, J-L Panazol, D Paneque, M Panter, MR Panzera, R Paoletti, M Paolillo, A Papayannis, G Papyan, A Paravac, JM Paredes, G Pareschi, N Park, D Parsons, P Paśko, S Pavy, M Pech, A Peck, G Pedaletti, A Pe'er, S Peet, D Pelat, A Pepato, MDC Perez, L Perri, M Perri, M Persic, M Persic, A Petrashyk, P-O Petrucci, O Petruk, B Peyaud, M Pfeifer, G Pfeiffer, G Piano, D Pieloth, E Pierre, F Pinto de Pinho, C Pio García, Y Piret, A Pisarski, S Pita, Ł Platos, R Platzer, S Podkladkin, L Pogosyan, M Pohl, P Poinsignon, A Pollo, A Porcelli, J Porthault, W Potter, S Poulios, J Poutanen, E Prandini, E Prandini, J Prast, K Pressard, G Principe, F Profeti, D Prokhorov, H Prokoph, M Prouza, R Pruchniewicz, G Pruteanu, E Pueschel, G Pühlhofer, I Puljak, M Punch, S Pürckhauer, R Pyzioł, F Queiroz, EJ Quel, J Quinn, A Quirrenbach, I Rafighi, S Rainò, PJ Rajda, M Rameez, R Rando, RC Rannot, M Rataj, T Ravel, S Razzaque, P Reardon, I Reichardt, O Reimann, A Reimer, O Reimer, A Reisenegger, M Renaud, S Renner, T Reposeur, B Reville, A Rezaeian, W Rhode, D Ribeiro, R Ribeiro Prado, M Ribó, G Richards, MG Richer, T Richtler, J Rico, J Ridky, F Rieger, M Riquelme, PR Ristori, S Rivoire, V Rizi, E Roache, J Rodriguez, G Rodriguez Fernandez, JJ Rodríguez Vázquez, G Rojas, P Romano, G Romeo, M Roncadelli, J Rosado, J Rose, S Rosen, S Rosier Lees, D Ross, G Rouaix, J Rousselle, AC Rovero, G Rowell, F Roy, S Royer, A Rubini, B Rudak, A Rugliancich, W Rujopakarn, C Rulten, M Rupiński, F Russo, F Russo, K Rutkowski, O Saavedra, S Sabatini, B Sacco, I Sadeh, EO Saemann, S Safi-Harb, A Saggion, V Sahakian, T Saito, N Sakaki, S Sakurai, A Salamon, M Salega, D Salek, F Salesa Greus, J Salgado, G Salina, L Salinas, A Salini, D Sanchez, M Sanchez-Conde, H Sandaker, A Sandoval, P Sangiorgi, M Sanguillon, H Sano, M Santander, A Santangelo, EM Santos, R Santos-Lima, A Sanuy, L Sapozhnikov, S Sarkar, K Satalecka, K Satalecka, Y Sato, R Savalle, M Sawada, F Sayède, S Schanne, T Schanz, EJ Schioppa, S Schlenstedt, J Schmid, T Schmidt, J Schmoll, M Schneider, H Schoorlemmer, P Schovanek, A Schubert, E-M Schullian, J Schultze, A Schulz, S Schulz, K Schure, F Schussler, T Schwab, U Schwanke, J Schwarz, T Schweizer, S Schwemmer, U Schwendicke, C Schwerdt, E Sciacca, S Scuderi, A Segreto, J-H Seiradakis, GH Sembroski, D Semikoz, O Sergijenko, N Serre, M Servillat, K Seweryn, N Shafi, A Shalchi, M Sharma, M Shayduk, RC Shellard, T Shibata, A Shigenaka, I Shilon, E Shum, L Sidoli, M Sidz, J Sieiro, H Siejkowski, J Silk, A Sillanpää, D Simone, H Simpson, BB Singh, A Sinha, G Sironi, J Sitarek, P Sizun, V Sliusar, V Sliusar, A Smith, D Sobczyńska, H Sol, G Sottile, M Sowiński, F Spanier, G Spengler, R Spiga, R Stadler, O Stahl, A Stamerra, S Stanič, R Starling, D Staszak, Ł Stawarz, R Steenkamp, S Stefanik, C Stegmann, S Steiner, C Stella, M Stephan, N Stergioulas, R Sternberger, M Sterzel, B Stevenson, F Stinzing, M Stodulska, M Stodulski, T Stolarczyk, G Stratta, U Straumann, L Stringhetti, M Strzys, R Stuik, K-H Sulanke, T Suomijärvi, AD Supanitsky, T Suric, I Sushch, P Sutcliffe, J Sykes, M Szanecki, T Szepieniec, P Szwarnog, A Tacchini, K Tachihara, G Tagliaferri, H Tajima, H Takahashi, K Takahashi, M Takahashi, L Takalo, S Takami, J Takata, J Takeda, G Talbot, T Tam, M Tanaka, S Tanaka, T Tanaka, Y Tanaka, C Tanci, S Tanigawa, M Tavani, F Tavecchio, J-P Tavernet, K Tayabaly, A Taylor, LA Tejedor, I Telezhinsky, F Temme, P Temnikov, C Tenzer, Y Terada, JC Terrazas, R Terrier, D Terront, T Terzic, D Tescaro, M Teshima, M Teshima, V Testa, D Tezier, J Thayer, J Thornhill, S Thoudam, D Thuermann, L Tibaldo, A Tiengo, MC Timpanaro, D Tiziani, M Tluczykont, CJ Todero Peixoto, F Tokanai, M Tokarz, K Toma, J Tomastik, Y Tomono, A Tonachini, D Tonev, K Torii, M Tornikoski, DF Torres, M Torres, E Torresi, G Toso, G Tosti, T Totani, N Tothill, F Toussenel, G Tovmassian, T Toyama, P Travnicek, C Trichard, M Trifoglio, I Troyano Pujadas, M Trzeciak, K Tsinganos, S Tsujimoto, T Tsuru, Y Uchiyama, G Umana, Y Umetsu, SS Upadhya, M Uslenghi, V Vagelli, F Vagnetti, J Valdes-Galicia, M Valentino, P Vallania, L Valore, W van Driel, C van Eldik, B van Soelen, J Vandenbroucke, J Vanderwalt, G Vasileiadis, V Vassiliev, JR Vázquez, ML Vázquez Acosta, M Vecchi, A Vega, I Vegas, P Veitch, P Venault, L Venema, C Venter, S Vercellone, S Vergani, K Verma, V Verzi, GP Vettolani, C Veyssiere, A Viana, N Viaux, J Vicha, C Vigorito, P Vincent, S Vincent, J Vink, V Vittorini, N Vlahakis, L Vlahos, H Voelk, V Voisin, A Vollhardt, A Volpicelli, H von Brand, S Vorobiov, I Vovk, M Vrastil, LV Vu, T Vuillaume, R Wagner, R Wagner, SJ Wagner, SP Wakely, T Walstra, R Walter, T Walther, JE Ward, M Ward, K Warda, D Warren, S Wassberg, JJ Watson, P Wawer, R Wawrzaszek, N Webb, P Wegner, O Weiner, A Weinstein, R Wells, F Werner, H Wetteskind, M White, R White, M Więcek, A Wierzcholska, S Wiesand, R Wijers, P Wilcox, N Wild, A Wilhelm, M Wilkinson, M Will, M Will, DA Williams, JT Williams, R Willingale, N Wilson, M Winde, K Winiarski, H Winkler, M Winter, R Wischnewski, E Witt, P Wojcik, D Wolf, M Wood, A Wörnlein, E Wu, T Wu, KK Yadav, H Yamamoto, T Yamamoto, N Yamane, R Yamazaki, S Yanagita, L Yang, D Yelos, A Yoshida, M Yoshida, T Yoshida, S Yoshiike, T Yoshikoshi, P Yu, V Zabalza, D Zaborov, M Zacharias, G Zaharijas, A Zajczyk, L Zampieri, F Zandanel, R Zanmar Sanchez, D Zaric, D Zavrtanik, M Zavrtanik, A Zdziarski, A Zech, H Zechlin, A Zhao, V Zhdanov, A Ziegler, J Ziemann, K Ziętara, A Zink, J Ziółkowski, V Zitelli, A Zoli, J Zorn, P Żychowski
Details from ArXiV

Frames of most uniform Hubble flow

Journal of Cosmology and Astroparticle Physics IOP Publishing 2016:10 (2016) 1-17

Authors:

David Kraljic, Subir Sarkar

Abstract:

It has been observed [1,2] that the locally measured Hubble parameter converges quickest to the background value and the dipole structure of the velocity field is smallest in the reference frame of the Local Group of galaxies. We study the statistical properties of Lorentz boosts with respect to the Cosmic Microwave Background frame which make the Hubble flow look most uniform around a particular observer. We use a very large N-Body simulation to extract the dependence of the boost velocities on the local environment such as underdensities, overdensities, and bulk flows. We find that the observation [1,2] is not unexpected if we are located in an underdensity, which is indeed the case for our position in the universe. The amplitude of the measured boost velocity for our location is consistent with the expectation in the standard cosmology.
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Search for sources of High-Energy neutrons with four years of data from the Icetop Detector

Astrophysical Journal Institute of Physics 830:2 (2016) 129-129

Abstract:

IceTop is an air-shower array located on the Antarctic ice sheet at the geographic South Pole. IceTop can detect an astrophysicalflux of neutrons from Galactic sources as an excess of cosmic-ray air showers arriving from the source direction. Neutrons are undeflected by the Galactic magneticfield and can typically travel 10(E/PeV)pc before decay. Two searches are performed using 4 yr of the IceTop data set to look for a statistically significant excess of events with energies above 10 PeV(10^16 eV) arriving within a small solid angle. The all-sky search method covers from−90°to approximately −50°in declination. No significant excess is found. A targeted search is also performed, looking for significant correlation with candidate sources in different target sets. This search uses a higher-energy cut(100 PeV) since most target objects lie beyond 1 kpc. The target sets include pulsars with confirmed TeV energy photon fluxes and high-mass X-ray binaries. No significant correlation is found for any target set. Flux upper limits are determined for both searches, which can constrain Galactic neutron sources and production scenarios.
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Review of Particle Physics

IOP Publishing 40:10 (2016) 100001
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All-flavour search for neutrinos from dark matter annihilations in the Milky Way with IceCube/DeepCore

European Physical Journal C Springer 76:10 (2016) 531

Abstract:

We present the first IceCube search for a signal of dark matter annihilations in the Milky Way using all-flavour neutrino-induced particle cascades. The analysis focuses on the DeepCore sub-detector of IceCube, and uses the surrounding IceCube strings as a veto region in order to select starting events in the DeepCore volume. We use 329 live-days of data from IceCube operating in its 86-string configuration during 2011–2012. No neutrino excess is found, the final result being compatible with the background-only hypothesis. From this null result, we derive upper limits on the velocity-averaged self-annihilation cross-section,<σAv>, for dark matter candidate masses ranging from 30 GeV up to 10 TeV, assuming both a cuspy and a flat-cored dark matter halo profile. For dark matter masses between 200 GeV and 10 TeV, the results improve on all previous IceCube results on <σAv>, reaching a level of 10^−23 cm3 s^−1 , depending on the annihilation channel assumed, for a cusped NFW profile. The analysis demonstrates that all-flavour searches are competitive with muon channel searches despite the intrinsically worse angular resolution of cascades compared to muon tracks in IceCube.

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