A Cocoon of Freshly Accelerated Cosmic Rays Detected by Fermi in the Cygnus Superbubble

Markus Ackermann Marco Ajello A. Allafort Luca Baldini Jean Ballet 1 Guido Barbiellini D. Bastieri A. Belfiore R. Bellazzini B. Berenji R. D. Blandford E. D. Bloom E. Bonamente A. W. Borgland E. Bottacini M. Brigida Pascal Bruel 2 R. Buehler S. Buson G. A. Caliandro R. A. Cameron P. A. Caraveo J. M. Casandjian 1 C. Cecchi A. Chekhtman C. C. Cheung J. Chiang S. Ciprini R. Claus J. Cohen-Tanugi 3 A. de Angelis F. de Palma C. D. Dermer E. Do Couto E Silva P. S. Drell D. Dumora 4 C. Favuzzi S. J. Fegan 2 W. B. Focke P. Fortin 2 Y. Fukazawa P. Fusco F. Gargano S. Germani N. Giglietto F. Giordano M. Giroletti T. Glanzman G. Godfrey I. A. Grenier 1 L. Guillemot S. Guiriec D. Hadasch Y. Hanabata A. K. Harding M. Hayashida K. Hayashi E. Hays G. Jóhannesson A. S. Johnson T. Kamae H. Katagiri J. Kataoka M. Kerr J. Knödlseder 5 M. Kuss J. Lande L. Latronico S.-H. Lee F. Longo F. Loparco B. Lott 4 M. N. Lovellette P. Lubrano P. Martin M. N. Mazziotta J. E. Mcenery J. Mehault 3 P. F. Michelson W. Mitthumsiri T. Mizuno C. Monte M. E. Monzani A. Morselli I. V. Moskalenko S. Murgia M. Naumann-Godo 1 P. L. Nolan J. P. Norris E. Nuss 3 T. Ohsugi A. Okumura E. Orlando J. F. Ormes M. Ozaki D. Paneque D. Parent M. Pesce-Rollins M. Pierbattista 1 F. Piron 3 M. Pohl D. Prokhorov S. Rainò R. Rando M. Razzano T. Reposeur 4 S. Ritz P. M. Saz Parkinson C. Sgrò E. J. Siskind P. D. Smith P. Spinelli A. W. Strong 6 H. Takahashi T. Tanaka J. G. Thayer J. B. Thayer 1 D. J. Thompson L. Tibaldo D. F. Torres G. Tosti A. Tramacere E. Troja Y. Uchiyama J. Vandenbroucke V. Vasileiou 3 G. Vianello V. Vitale A. P. Waite P. Wang B. L. Winer K. S. Wood Z. Yang S. Zimmer Sylvain Bontemps 7
1 AIM (UMR_7158 / UMR_E_9005 / UM_112) - Astrophysique Interprétation Modélisation
2 LLR - Laboratoire Leprince-Ringuet
3 LUPM - Laboratoire Univers et Particules de Montpellier
4 GLAST
CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan
5 IRAP - Institut de recherche en astrophysique et planétologie
6 MPE - Max-Planck-Institut für Extraterrestrische Physik
7 FORMATION STELLAIRE 2011
L3AB - Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux, OASU - Observatoire aquitain des sciences de l'univers, LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac], Université Sciences et Technologies - Bordeaux 1
Abstract : The origin of Galactic cosmic rays is a century-long puzzle. Indirect evidence points to their acceleration by supernova shockwaves, but we know little of their escape from the shock and their evolution through the turbulent medium surrounding massive stars. Gamma rays can probe their spreading through the ambient gas and radiation fields. The Fermi Large Area Telescope (LAT) has observed the star-forming region of Cygnus X. The 1- to 100-gigaelectronvolt images reveal a 50-parsec-wide cocoon of freshly accelerated cosmic rays that flood the cavities carved by the stellar winds and ionization fronts from young stellar clusters. It provides an example to study the youth of cosmic rays in a superbubble environment before they merge into the older Galactic population.
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https://hal.archives-ouvertes.fr/hal-00651320
Contributeur : Marie-Paule Pomies <>
Soumis le : mardi 13 décembre 2011 - 12:48:40
Dernière modification le : mardi 10 décembre 2019 - 15:28:53

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CEA | INSU | IN2P3 | CENBG | LLR | CNRS | L3AB | PARISTECH | X-LLR | X | LUPM | UNIV-PARIS7 | OMP | OMP-IRAP | USPC | MIPS | DSM-IRFU | IRFU-AIM | UNIV-MONTPELLIER | CEA-DRF | X-DEP-PHYS | LUPM_EMA | UNIV-TLSE3

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Markus Ackermann, Marco Ajello, A. Allafort, Luca Baldini, Jean Ballet, et al.. A Cocoon of Freshly Accelerated Cosmic Rays Detected by Fermi in the Cygnus Superbubble. Science, American Association for the Advancement of Science, 2011, 334, pp.1103-. ⟨10.1126/SCIENCE.1210311⟩. ⟨hal-00651320⟩

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