A
A. Geranios
Researcher at National and Kapodistrian University of Athens
Publications - 69
Citations - 830
A. Geranios is an academic researcher from National and Kapodistrian University of Athens. The author has contributed to research in topics: Solar wind & Interplanetary magnetic field. The author has an hindex of 14, co-authored 69 publications receiving 805 citations. Previous affiliations of A. Geranios include Max Planck Society & University of Oxford.
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Journal ArticleDOI
An upper limit to the photon fraction in cosmic rays above 10(19) eV from the Pierre Auger Observatory
J. Abraham,Marco Aglietta,C. Aguirre,D. Allard,I. Allekotte,P. Allison,C. Alvarez,Jaime Alvarez-Muñiz,M. Ambrosio,L. Anchordoqui,L. Anchordoqui,J. C. Anjos,Carla Aramo,K. Arisaka,E. Armengaud,F. Arneodo,F. Arqueros,T. Asch,Hernán Gonzalo Asorey,B. S. Atulugama,J. Aublin,M. Ave,Gualberto Avila,J. Bacelar,T. Baecker,Daniel Omar Badagnani,A. F. Barbosa,Henrique M. J. Barbosa,M. Barkhausen,D. Barnhill,S. L. C. Barroso,P. Bauleo,J. Beatty,T. Beau,Bruce Becker,K. H. Becker,Jose A. Bellido,Segev BenZvi,Corinne Berat,T. Bergmann,P. Bernardini,Xavier Bertou,Peter L. Biermann,P. Billoir,O. Blanch-Bigas,Francisco J. Blanco,P. Blasi,C. Bleve,H. Bluemer,P. Boghrat,M. Bohacova,C. Bonifazi,R. Bonino,M. Boratav,J. Brack,J. M. Brunet,P. Buchholz,N. G. Busca,K. S. Caballero-Mora,Bei Cai,D. V. Camin,J. N. Capdevielle,Rossella Caruso,A. Castellina,G. Cataldi,L. Cazon,R. Cester,J. Chauvin,A. Chiavassa,J. A. Chinellato,A. Chou,J. Chye,D. R. Claes,P. D. J. Clark,R. W. Clay,S. B. Clay,B. Connolly,A. Cordier,U. Cotti,S. Coutu,Corbin Covault,J. W. Cronin,S. Dagoret-Campagne,T. Dang Quang,P. Darriulat,K. Daumiller,Bruce R. Dawson,R. M. de Almeida,L. A. de Carvalho,C. De Donato,S. De Jong,W. J. M. de Mello,J. R. T. de Mello Neto,I. De Mitri,M. A. L. de Oliveira,V. de Souza,L. del Peral,O. Deligny,A. Della Selva,C. Delle Fratte,H. Dembinski,C. Di Giulio,J. C. Diaz,C. Dobrigkeit,J. C. D'Olivo,D. Dornic,A. Dorofeev,M. T. Dova,D. D'Urso,M. A. DuVernois,R. Engel,Luis N. Epele,C. O. Escobar,A. Etchegoyen,A. Ewers,P. Facal San Luis,Heino Falcke,Heino Falcke,A. C. Fauth,D. Fazio,N. Fazzini,A. Fernandez,Francesc Ferrer,S. Ferry,B. Fick,A. Filevich,A. Filipcic,I. Fleck,E. Fokitis,R. Fonte,D. Fuhrmann,W. Fulgione,B. Garcia,D. Garcia-Pinto,L. Garrard,X. Garrido,H. Geenen,G. Gelmini,H. Gemmeke,A. Geranios,P. L. Ghia,M. Giller,J. Gitto,H. Glass,Fabian Gobbi,M. Gold,F. Gomez Albarracin,M. Gómez Berisso,R. Gómez Herrero,M. Gonçalves do Amaral,Juan Pablo Gongora,D. Gonzalez,J. G. Gonzalez,M. Gonzalez,Dariusz Gora,Dariusz Gora,A. Gorgi,P. Gouffon,V. Grassi,A. F. Grillo,C. Grunfeld,C. Grupen,F. Guarino,G. P. Guedes,J. Gutiérrez,J. D. Hague,J. C. Hamilton,Mohsen Harakeh,D. Harari,S. Harmsma,S. Hartmann,J. L. Harton,M. D. Healy,T. Hebbeker,D. Heck,C. Hojvat,Piotr Homola,J. Hoerandel,A. Horneffer,M. Horvat,M. Hrabovsky,M. Iarlori,A. Insolia,M. Kaducak,Oleg Kalashev,K. H. Kampert,B. Keilhauer,E. Kemp,H. O. Klages,M. Kleifges,J. Kleinfeller,R. Knapik,J. Knapp,D. H. Koang,Y. Kolotaev,Andreas Kopmann,O. Kroemer,S. Kuhlman,Jan Kuijpers,N. Kunka,A. Kusenko,C. Lachaud,Bruno L. Lago,D. Lebrun,P. LeBrun,J. Lee,A. Letessier-Selvon,M. Leuthold,M. Leuthold,I. Lhenry-Yvon,G. Longo,R. Lopez,A. Lopez Agüera,A. Lucero,S. Maldera,M. Malek,S. Maltezos,G. Mancarella,M. E. Mancenido,Dusan Mandat,P. Mantsch,A. G. Mariazzi,I. C. Maris,D. Martello,N. Martinez,José Eduardo Martinez,O. Martinez,H. J. Mathes,J. Matthews,J. Matthews,J. A. J. Matthews,G. Matthiae,G. Maurin,D. Maurizio,P. O. Mazur,T. McCauley,M. McEwen,R. R. McNeil,G. Medina,M. C. Medina,G. A. Medina Tanco,Albano C. Meli,Diego Melo,E. Menichetti,A. Menshikov,C. Meurer,R. Meyhandan,M. I. Micheletti,G. Miele,Warner A. Miller,Silvia Mollerach,M. Monasor,D. Monnier Ragaigne,François Montanet,B. Morales,C. Morello,E. Moreno,M. Mostafa,M. A. Muller,R. Mussa,G. Navarra,L. Nellen,Catherine Newman-Holmes,D. Newton,T. Nguyen Thi,R. Nichol,N. Nierstenhoefer,D. Nitz,H. Nogima,D. Nosek,Libor Nozka,J. Oehlschlaeger,T. Ohnuki,Angela V. Olinto,L. F. A. Oliveira,V. M. Olmos-Gilbaja,M.E. Ortiz,S. Ostapchenko,L. Otero,M. Palatka,J. Pallotta,G. Parente,E. Parizot,S. Parlati,M. Patel,T. Paul,K. Payet,Miroslav Pech,Jan Pękala,R. Pelayo,I. M. Pepe,L. Perrone,S. Petrera,P. Petrinca,Y. Petrov,D. Pham Ngoc,T. N. Pham Thi,R. Piegaia,T. Pierog,O. Pisanti,T. A. Porter,J. Pouryamout,L. Prado,P. Privitera,M. Prouza,E. J. Quel,J. Rautenberg,H. C. Reis,S. Reucroft,B. Revenu,J. Ridky,A. Risi,M. Risse,Colas Rivière,Vincenzo Rizi,S. Robbins,M. Roberts,C. Robledo,G. Rodriguez,D. Rodríguez Frías,J. Rodríguez Martino,J. Rodriguez Rojo,German Ros,Esteban Roulet,A. C. Rovero,Jaime Rosado,M. Roth,C. Roucelle,B. Rouillé-d'Orfeuil,F. Salamida,Humberto Ibarguen Salazar,G. Salina,F. Sanchez,Marcos Santander,E. M. Santos,Subir Sarkar,R. Sato,V. Scherini,Torsten Schmidt,Olaf Scholten,Petr Schovanek,F. Schuessler,S. J. Sciutto,Mario Scuderi,D. Semikoz,G. Sequeiros,R. C. Shellard,Beatriz B. Siffert,G. Sigl,P. Skelton,W. Slater,N. Smetniansky De Grande,A. Smialkowski,Radomir Smida,B. E. Smith,Gregory R Snow,P. Sokolsky,P. Sommers,J. Sorokin,H. Spinka,E. Strazzeri,A. Stutz,F. Suarez,T. Suomijaervi,A. D. Supanitsky,J. Swain,Z. Szadkowski,Z. Szadkowski,A. Tamashiro,A. Tamburro,O. Taşcău,R. Ticona,C. Timmermans,C. Timmermans,W. Tkaczyk,C. J. Todero Peixoto,A. Tonachini,D. Torresi,Petr Travnicek,A. Tripathi,G. Tristram,D. Tscherniakhovski,M. Tueros,V. Tunnicliffe,R. Ulrich,M. Unger,M. Urban,J. F. Valdés Galicia,I. Valiño,L. Valore,van den Ad M Berg,V. Van Elewyck,R. A. Vázquez,D. Veberic,Alejandro Luis Veiga,Antonio Velarde,T. Venters,V. Verzi,M. Videla,L. Villasenor,T. Vo Van,S. Vorobiov,L. Voyvodic,H. Wahlberg,O. Wainberg,T. Waldenmaier,P. Walker,D. Warner,Alan Watson,S. Westerhoff,C. Wiebusch,G. Wieczorek,Lawrence Wiencke,B. Wilczynska,H. Wilczynski,C. Wileman,M. G. Winnick,T. Yamamoto,P. Younk,Enrique Zas,D. Zavrtanik,M. Zavrtanik,A. Zech,A. Zepeda,M. Zha,M. Ziolkowski +425 more
TL;DR: In this article, an upper bound of 16% (at 95% c.l.) was derived for the photon fraction in cosmic rays with energies greater than 1019 eV, based on observations of the depth of shower maximum performed with the hybrid detector of the Pierre Auger Observatory.
Journal ArticleDOI
MHD simulation of an interaction of a shock wave with a magnetic cloud
TL;DR: In this paper, the authors show how a magnetic cloud (flux rope) propagating with a speed 3 times higher than the ambient solar wind is affected by an even faster traveling shock wave overtaking the cloud.
Journal ArticleDOI
Anisotropy studies around the galactic centre at EeV energies with the Auger Observatory
J. Abraham,Marco Aglietta,C. Aguirre,D. Allard,Ingomar Allekotte,P. Allison,C. Alvarez,Jaime Alvarez-Muñiz,M. Ambrosio,Luis A. Anchordoqui,Luis A. Anchordoqui,J. C. Anjos,C. Aramo,K. Arisaka,E. Armengaud,F. Arneodo,F. Arqueros,T. Asch,Hernán Asorey,B. S. Atulugama,J. Aublin,M. Ave,Gualberto Avila,Jc Bacelar,T. Bäcker,Daniel Omar Badagnani,A. F. Barbosa,Henrique M. J. Barbosa,M. Barkhausen,D. Barnhill,S. L. C. Barroso,P. Bauleo,J. Beatty,T. Beau,B. R. Becker,K.-H. Becker,Jose A. Bellido,Segev BenZvi,Corinne Berat,T. Bergmann,P. Bernardini,Xavier Bertou,P. L. Biermann,P. Billoir,O. Blanch-Bigas,Francisco J. Blanco,P. Blasi,P. Blasi,C. Bleve,H. Blümer,H. Blümer,P. Boghrat,M. Boháčová,C. Bonifazi,R. Bonino,M. Boratav,J. Brack,J. M. Brunet,P. Buchholz,N. G. Busca,K. S. Caballero-Mora,Bei Cai,D. V. Camin,J. N. Capdevielle,Rossella Caruso,Antonella Castellina,G. Cataldi,L. Cazon,R. Cester,J. Chauvin,A. Chiavassa,Jose Chinellato,A. Chou,J. Chye,D. R. Claes,P. D. J. Clark,R. W. Clay,S. B. Clay,B. Connolly,A. Cordier,U. Cotti,S. Coutu,Corbin Covault,J. W. Cronin,S. Dagoret-Campagne,T. Dang Quang,P. Darriulat,K. Daumiller,Bruce R. Dawson,R. M. de Almeida,L. A. de Carvalho,C. De Donato,S. De Jong,W. J. M. de Mello,J. R. T. de Mello Neto,I. De Mitri,M. A. L. de Oliveira,V. de Souza,L. del Peral,O. Deligny,A. Della Selva,C. Delle Fratte,H. Dembinski,C. Di Giulio,J. C. Diaz,Carola Dobrigkeit,J. C. D'Olivo,D. Dornic,A. Dorofeev,M. T. Dova,D. D'Urso,M. A. DuVernois,R. Engel,Luis N. Epele,Martin Erdmann,Carlos Escobar,A. Etchegoyen,A. Ewers,P. Facal San Luis,Heino Falcke,Heino Falcke,A. C. Fauth,D. Fazio,N. Fazzini,A. Fernandez,Francesc Ferrer,S. Ferry,B. Fick,A. Filevich,Andrej Filipcic,I. Fleck,E. Fokitis,R. Fonte,D. Fuhrmann,W. Fulgione,B. Garcia,D. Garcia-Pinto,L. Garrard,X. Garrido,Heiko Geenen,G. Gelmini,H. Gemmeke,A. Geranios,P. L. Ghia,M. Giller,J. Gitto,H. Glass,Fabian Gobbi,M. Gold,F. Gomez Albarracin,M. Gómez Berisso,R. Gómez Herrero,M. Gonçalves do Amaral,Juan Pablo Gongora,D. Gonzalez,J. G. Gonzalez,M. Gonzalez,Dariusz Gora,Dariusz Gora,A. Gorgi,P. Gouffon,V. Grassi,A. Grillo,C. Grunfeld,C. Grupen,F. Guarino,G. P. Guedes,J. Gutiérrez,J. D. Hague,J. C. Hamilton,Mohsen Harakeh,D. Harari,S. Harmsma,S. Hartmann,J. L. Harton,A. Haungs,M. D. Healy,Thomas Hebbeker,D. Heck,C. Hojvat,Piotr Homola,Jörg R. Hörandel,A. Horneffer,Milena Horvat,M. Hrabovský,Tim Huege,M. Iarlori,A. Insolia,M. Kaducak,Oleg Kalashev,Karl-Heinz Kampert,B. Keilhauer,E. Kemp,H. O. Klages,M. Kleifges,J. Kleinfeller,R. Knapik,J. Knapp,D. H. Koang,Y. Kolotaev,Andreas Kopmann,O. Krömer,S. Kuhlman,Jan Kuijpers,N. Kunka,A. Kusenko,C. Lachaud,Bruno L. Lago,D. Lebrun,P. LeBrun,J. Lee,A. Letessier-Selvon,Matthias Leuthold,I. Lhenry-Yvon,Giuseppe Longo,R. Lopez,A. Lopez Agüera,A. Lucero,S. Maldera,M. Malek,S. Maltezos,G. Mancarella,M. E. Mancenido,Dusan Mandat,P. Mantsch,A. G. Mariazzi,I. C. Maris,D. Martello,N. Martinez,José Eduardo Martinez,O. Martinez,H. J. Mathes,J. Matthews,J. Matthews,J. A. J. Matthews,G. Matthiae,G. Maurin,D. Maurizio,P. O. Mazur,T. McCauley,M. McEwen,R. R. McNeil,G. Medina,M. C. Medina,G. A. Medina Tanco,A. Meli,Diego Melo,E. Menichetti,A. Menshikov,C. Meurer,R. Meyhandan,M. I. Micheletti,G. Miele,Warner A. Miller,Silvia Mollerach,M. Monasor,D. Monnier Ragaigne,F. Montanet,B. Morales,C. Morello,E. Moreno,C. Morris,Miguel Mostafa,Marcio Aparecido Muller,R. Mussa,G. Navarra,L. Nellen,Catherine Newman-Holmes,D. Newton,T. Nguyen Thi,R. Nichol,N. Nierstenhöfer,D. Nitz,Helio Nogima,D. Nosek,L. Nožka,J. Oehlschläger,T. Ohnuki,Angela V. Olinto,L. F. A. Oliveira,V. M. Olmos-Gilbaja,M. Ortiz,S. Ostapchenko,L. Otero,M. Palatka,J. Pallotta,G. Parente,E. Parizot,S. Parlati,M. Patel,T. Paul,K. Payet,Miroslav Pech,J. Pȩkala,R. Pelayo,I. M. Pepe,L. Perrone,S. Petrera,P. Petrinca,Y. Petrov,D. Pham Ngoc,T. N. Pham Thi,R. Piegaia,T. Pierog,O. Pisanti,T. A. Porter,J. Pouryamout,L. Prado,P. Privitera,M. Prouza,E. J. Quel,J. Rautenberg,H. C. Reis,S. Reucroft,B. Revenu,J. Řídký,A. Risi,M. Risse,C. Rivière,Vincenzo Rizi,S. Robbins,M. Roberts,C. Robledo,G. Rodriguez,D. Rodríguez Frías,J. Rodríguez Martino,J.R. Rodriguez Rojo,German Ros,J. Rosado,M. Roth,C. Roucelle,B. Rouillé-d'Orfeuil,Esteban Roulet,A. C. Rovero,F. Salamida,Humberto Ibarguen Salazar,G. Salina,F. Sanchez,Marcos Santander,E. M. Santos,Subir Sarkar,R. Sato,V. Scherini,H. Schieler,T. Schmidt,Olaf Scholten,Petr Schovanek,F. Schüssler,S. J. Sciutto,Mario Scuderi,D. Semikoz,G. Sequeiros,R. C. Shellard,Beatriz B. Siffert,G. Sigl,P. Skelton,W. Slater,N. Smetniansky De Grande,A. Smialkowski,Radomir Smida,B. E. Smith,Gregory R Snow,P. Sokolsky,P. Sommers,J. Sorokin,H. Spinka,E. Strazzeri,A. Stutz,F. Suarez,T. Suomijärvi,A. D. Supanitsky,J. Swain,Z. Szadkowski,A. Tamashiro,A. Tamburro,O. Tascau,R. Ticona,C. Timmermans,C. Timmermans,W. Tkaczyk,C. J. Todero Peixoto,A. Tonachini,D. Torresi,Petr Travnicek,A. Tripathi,G. Tristram,D. Tscherniakhovski,M. Tueros,V. Tunnicliffe,R. Ulrich,M. Unger,M. Urban,J. F. Valdés Galicia,I. Valiño,L. Valore,A. M. van den Berg,V. Van Elewyck,R. A. Vázquez,Darko Veberic,Alejandro Luis Veiga,Antonio Velarde,T. Venters,V. Verzi,M. Videla,L. Villasenor,T. Vo Van,S. Vorobiov,L. Voyvodic,H. Wahlberg,O. Wainberg,T. Waldenmaier,P. Walker,D. Warner,Alan Watson,S. Westerhoff,C. H. Wiebusch,G. Wieczorek,Lawrence Wiencke,B. Wilczynska,H. Wilczynski,C. Wileman,M. G. Winnick,J. Xu,T. Yamamoto,P. Younk,Enrique Zas,D. Zavrtanik,M. Zavrtanik,A. Zech,A. Zepeda,M. Zha,M. Ziolkowski +431 more
TL;DR: In this article, the Pierre Auger Observatory data were analyzed to search for anisotropies near the direction of the Galactic Centre at EeV energies, and the results do not support previous findings of localized excesses in the AGASA and SUGAR data.
Journal ArticleDOI
Spheroidal models of magnetic clouds and their comparison with spacecraft measurements
TL;DR: In this article, magnetic force-free solutions for spherical, oblate, and prolate clouds are presented and their magnetic field configurations are shown. But no exact determination of the cloud boundaries has been given up to now.
Journal ArticleDOI
October/November 2003 interplanetary coronal mass ejections: ACE/EPAM solar energetic particle observations
Olga Malandraki,Olga Malandraki,David Lario,Louis J. Lanzerotti,Emmanuel T. Sarris,A. Geranios,Georgia Tsiropoula +6 more
TL;DR: In this article, the authors analyze the energetic particle signatures measured at 1 AU by the EPAM experiment on board ACE during the passage and in the vicinity of these ICMEs, and use these signatures as diagnostic tracers of the large-scale structure and topology of the interplanetary magnetic field embedded within both ICME events.