Skip to main page content
Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2013 Feb 15;339(6121):807-11.
doi: 10.1126/science.1231160.

Detection of the Characteristic Pion-Decay Signature in Supernova Remnants

M Ackermann  1 M AjelloA AllafortL BaldiniJ BalletG BarbielliniM G BaringD BastieriK BechtolR BellazziniR D BlandfordE D BloomE BonamenteA W BorglandE BottaciniT J BrandtJ BregeonM BrigidaP BruelR BuehlerG BusettoS BusonG A CaliandroR A CameronP A CaraveoJ M CasandjianC CecchiO CelikE CharlesS ChatyR C G ChavesA ChekhtmanC C CheungJ ChiangG ChiaroA N CillisS CipriniR ClausJ Cohen-TanugiL R CominskyJ ConradS CorbelS CutiniF D'AmmandoA de AngelisF de PalmaC D DermerE do Couto e SilvaP S DrellA Drlica-WagnerL FallettiC FavuzziE C FerraraA FranckowiakY FukazawaS FunkP FuscoF GarganoS GermaniN GigliettoP GiommiF GiordanoM GirolettiT GlanzmanG GodfreyI A GrenierM-H GrondinJ E GroveS GuiriecD HadaschY HanabataA K HardingM HayashidaK HayashiE HaysJ W HewittA B HillR E HughesM S JacksonT JoglerG JóhannessonA S JohnsonT KamaeJ KataokaJ KatsutaJ KnödlsederM KussJ LandeS LarssonL LatronicoM Lemoine-GoumardF LongoF LoparcoM N LovelletteP LubranoG M MadejskiF MassaroM MayerM N MazziottaJ E McEneryJ MehaultP F MichelsonR P MignaniW MitthumsiriT MizunoA A MoiseevM E MonzaniA MorselliI V MoskalenkoS MurgiaT NakamoriR NemmenE NussM OhnoT OhsugiN OmodeiM OrientiE OrlandoJ F OrmesD PanequeJ S PerkinsM Pesce-RollinsF PironG PivatoS RainòR RandoM RazzanoS RazzaqueA ReimerO ReimerS RitzC RomoliM Sánchez-CondeA SchulzC SgròP E SimeonE J SiskindD A SmithG SpandreP SpinelliF W SteckerA W StrongD J SusonH TajimaH TakahashiT TakahashiT TanakaJ G ThayerJ B ThayerD J ThompsonS E ThorsettL TibaldoO TibollaM TinivellaE TrojaY UchiyamaT L UsherJ VandenbrouckeV VasileiouG VianelloV VitaleA P WaiteM WernerB L WinerK S WoodM WoodR YamazakiZ YangS Zimmer
Affiliations

Detection of the Characteristic Pion-Decay Signature in Supernova Remnants

M Ackermann et al. Science. .

Abstract

Cosmic rays are particles (mostly protons) accelerated to relativistic speeds. Despite wide agreement that supernova remnants (SNRs) are the sources of galactic cosmic rays, unequivocal evidence for the acceleration of protons in these objects is still lacking. When accelerated protons encounter interstellar material, they produce neutral pions, which in turn decay into gamma rays. This offers a compelling way to detect the acceleration sites of protons. The identification of pion-decay gamma rays has been difficult because high-energy electrons also produce gamma rays via bremsstrahlung and inverse Compton scattering. We detected the characteristic pion-decay feature in the gamma-ray spectra of two SNRs, IC 443 and W44, with the Fermi Large Area Telescope. This detection provides direct evidence that cosmic-ray protons are accelerated in SNRs.

Similar articles

  • The acceleration of cosmic-ray protons in the supernova remnant RX J1713.7-3946.
    Enomoto R, Tanimori T, Naito T, Yoshida T, Yanagita S, Mori M, Edwards PG, Asahara A, Bicknell GV, Gunji S, Hara S, Hara T, Hayashi S, Itoh C, Kabuki S, Kajino F, Katagiri H, Kataoka J, Kawachi A, Kifune T, Kubo H, Kushida J, Maeda S, Maeshiro A, Matsubara Y, Mizumoto Y, Moriya M, Muraishi H, Muraki Y, Nakase T, Nishijima K, Ohishi M, Okumura K, Patterson JR, Sakurazawa K, Suzuki R, Swaby DL, Takano K, Takano T, Tokanai F, Tsuchiya K, Tsunoo H, Uruma K, Watanabe A, Yoshikoshi T. Enomoto R, et al. Nature. 2002 Apr 25;416(6883):823-6. doi: 10.1038/416823a. Nature. 2002. PMID: 11976676
  • Gamma-ray emission from the shell of supernova remnant W44 revealed by the Fermi LAT.
    Abdo AA, Ackermann M, Ajello M, Baldini L, Ballet J, Barbiellini G, Baring MG, Bastieri D, Baughman BM, Bechtol K, Bellazzini R, Berenji B, Blandford RD, Bloom ED, Bonamente E, Borgland AW, Bregeon J, Brez A, Brigida M, Bruel P, Burnett TH, Buson S, Caliandro GA, Cameron RA, Caraveo PA, Casandjian JM, Cecchi C, Celik O, Chekhtman A, Cheung CC, Chiang J, Ciprini S, Claus R, Cognard I, Cohen-Tanugi J, Cominsky LR, Conrad J, Cutini S, Dermer CD, de Angelis A, de Palma F, Digel SW, do Couto e Silva E, Drell PS, Dubois R, Dumora D, Espinoza C, Farnier C, Favuzzi C, Fegan SJ, Focke WB, Fortin P, Frailis M, Fukazawa Y, Funk S, Fusco P, Gargano F, Gasparrini D, Gehrels N, Germani S, Giavitto G, Giebels B, Giglietto N, Giordano F, Glanzman T, Godfrey G, Grenier IA, Grondin MH, Grove JE, Guillemot L, Guiriec S, Hanabata Y, Harding AK, Hayashida M, Hays E, Hughes RE, Jackson MS, Jóhannesson G, Johnson AS, Johnson TJ, Johnson WN, Kamae T, Katagiri H, Kataoka J, Katsuta J, Kawai N, Kerr M, Knödlseder J, Kocian ML, Kramer M, Kuss M, Lande J, Latronico L, Lemoine-Goumard M, Longo F, Loparco F, Lott B, Lovellette MN, Lubrano P, Lyne AG, Madejski GM, Makeev A, Mazziotta MN, McEnery JE, Meurer C, Michelson PF, Mitthumsiri W, Mizuno T, Monte C, Monzani ME, Morselli A, Moskalenko IV, Murgia S, Nakamori T, Nolan PL, Norris JP, Noutsos A, Nuss E, Ohsugi T, Omodei N, Orlando E, Ormes JF, Paneque D, Parent D, Pelassa V, Pepe M, Pesce-Rollins M, Piron F, Porter TA, Rainò S, Rando R, Razzano M, Reimer A, Reimer O, Reposeur T, Rochester LS, Rodriguez AY, Romani RW, Roth M, Ryde F, Sadrozinski HF, Sanchez D, Sander A, Saz Parkinson PM, Scargle JD, Sgrò C, Siskind EJ, Smith DA, Smith PD, Spandre G, Spinelli P, Stappers BW, Stecker FW, Strickman MS, Suson DJ, Tajima H, Takahashi H, Takahashi T, Tanaka T, Thayer JB, Thayer JG, Theureau G, Thompson DJ, Tibaldo L, Tibolla O, Torres DF, Tosti G, Tramacere A, Uchiyama Y, Usher TL, Vasileiou V, Venter C, Vilchez N, Vitale V, Waite AP, Wang P, Winer BL, Wood KS, Yamazaki R, Ylinen T, Ziegler M. Abdo AA, et al. Science. 2010 Feb 26;327(5969):1103-6. doi: 10.1126/science.1182787. Epub 2010 Jan 7. Science. 2010. PMID: 20056857
  • An excess of cosmic ray electrons at energies of 300-800 GeV.
    Chang J, Adams JH, Ahn HS, Bashindzhagyan GL, Christl M, Ganel O, Guzik TG, Isbert J, Kim KC, Kuznetsov EN, Panasyuk MI, Panov AD, Schmidt WK, Seo ES, Sokolskaya NV, Watts JW, Wefel JP, Wu J, Zatsepin VI. Chang J, et al. Nature. 2008 Nov 20;456(7220):362-5. doi: 10.1038/nature07477. Nature. 2008. PMID: 19020615
  • Discovery of very-high-energy gamma-rays from the Galactic Centre ridge.
    Aharonian F, Akhperjanian AG, Bazer-Bachi AR, Beilicke M, Benbow W, Berge D, Bernlöhr K, Boisson C, Bolz O, Borrel V, Braun I, Breitling F, Brown AM, Chadwick PM, Chounet LM, Cornils R, Costamante L, Degrange B, Dickinson HJ, Djannati-Ataï A, Drury LO, Dubus G, Emmanoulopoulos D, Espigat P, Feinstein F, Fontaine G, Fuchs Y, Funk S, Gallant YA, Giebels B, Gillessen S, Glicenstein JF, Goret P, Hadjichristidis C, Hauser D, Hauser M, Heinzelmann G, Henri G, Hermann G, Hinton JA, Hofmann W, Holleran M, Horns D, Jacholkowska A, de Jager OC, Khélifi B, Klages S, Komin N, Konopelko A, Latham IJ, Le Gallou R, Lemière A, Lemoine-Goumard M, Leroy N, Lohse T, Marcowith A, Martin JM, Martineau-Huynh O, Masterson C, McComb TJ, de Naurois M, Nolan SJ, Noutsos A, Orford KJ, Osborne JL, Ouchrif M, Panter M, Pelletier G, Pita S, Pühlhofer G, Punch M, Raubenheimer BC, Raue M, Raux J, Rayner SM, Reimer A, Reimer O, Ripken J, Rob L, Rolland L, Rowell G, Sahakian V, Saugé L, Schlenker S, Schlickeiser R, Schuster C, Schwanke U, Siewert M, Sol H, Spangler D, Steenkamp R, Stegmann C, Tavernet JP, Terrier R, Théoret CG, Tluczykont M, van Eldik C, Vasileiadis G, Venter C, Vincent P, Völk HJ, Wagner SJ. Aharonian F, et al. Nature. 2006 Feb 9;439(7077):695-8. doi: 10.1038/nature04467. Nature. 2006. PMID: 16467831
  • Extremely fast acceleration of cosmic rays in a supernova remnant.
    Uchiyama Y, Aharonian FA, Tanaka T, Takahashi T, Maeda Y. Uchiyama Y, et al. Nature. 2007 Oct 4;449(7162):576-8. doi: 10.1038/nature06210. Nature. 2007. PMID: 17914390
See all similar articles

Cited by 5 articles

Publication types

LinkOut - more resources

Feedback