Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
A study of Tycho's SNR at TeV energies with the HEGRA CT-System
Autore:
Aharonian, FA; Akhperjanian, AG; Barrio, JA; Bernlohr, K; Borst, H; Bojahr, H; Bolz, O; Contreas, JL; Cortina, J; Denninghoff, S; Fonseca, V; Gonzales, JC; Gotting, N; Heinzelmann, G; Hermann, G; Heusler, A; Hofmann, W; Horns, D; Ibarra, A; Jung, I; Kankanyan, R; Kestel, M; Kettler, J; Kohnle, A; Konopelko, A; Kornmeyer, H; Kranich, D; Krawczynski, H; Lampeitl, H; Lorenz, E; Lucarelli, F; Magnussen, N; Mang, O; Meyer, H; Mirzoyan, R; Moralejo, A; Padilla, L; Panter, M; Plaga, R; Plyasheshnikov, A; Prahl, J; Puhlhofer, G; Rauterberg, G; Rohring, A; Rhode, W; Rowell, GP; Sahakian, V; Samorski, M; Schilling, M; Schroder, F; Stamm, W; Tluczykont, M; Volk, HJ; Wiedner, C; Wittek, W;
Indirizzi:
Max Planck Inst Kernphys, D-69029 Heidelberg, Germany Max Planck Inst Kernphys Heidelberg Germany D-69029 Heidelberg, Germany Max Planck Inst Phys, D-80805 Munich, Germany Max Planck Inst Phys Munich Germany D-80805 hys, D-80805 Munich, Germany Univ Complutense, Fac Ciencias Fis, E-28040 Madrid, Spain Univ Complutense Madrid Spain E-28040 iencias Fis, E-28040 Madrid, Spain Univ Hamburg, Inst Expt Phys 2, D-22761 Hamburg, Germany Univ Hamburg Hamburg Germany D-22761 pt Phys 2, D-22761 Hamburg, Germany Univ Kiel, Inst Expt & Angew Phys, D-24118 Kiel, Germany Univ Kiel Kiel Germany D-24118 Expt & Angew Phys, D-24118 Kiel, Germany Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, D-42097 Wuppertal, Germany Berg Univ Gesamthsch Wuppertal Wuppertal Germany D-42097 pertal, Germany Yerevan Phys Inst, Yerevan 375036, Armenia Yerevan Phys Inst Yerevan Armenia 375036 s Inst, Yerevan 375036, Armenia
Titolo Testata:
ASTRONOMY & ASTROPHYSICS
fascicolo: 1, volume: 373, anno: 2001,
pagine: 292 - 300
SICI:
1432-0746(200107)373:1<292:ASOTSA>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
GAMMA-RAY EMISSION; AIR CERENKOV TELESCOPES; SUPERNOVA REMNANT; CRAB-NEBULA; SHOCK ACCELERATION; RX J1713.7-3946; X-RAYS; RADIATION; SEARCH; SHELL;
Keywords:
gamma rays : observations; ISM : supernova remnants : individual objects : Tycho's SNR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
60
Recensione:
Indirizzi per estratti:
Indirizzo: Rowell, GP Max Planck Inst Kernphys, Postfach 103980, D-69029 Heidelberg, Germany Max Planck Inst Kernphys Postfach 103980 Heidelberg Germany D-69029
Citazione:
F.A. Aharonian et al., "A study of Tycho's SNR at TeV energies with the HEGRA CT-System", ASTRON ASTR, 373(1), 2001, pp. 292-300

Abstract

Tycho's supernova remnant (SNR) was observed during 1997 and 1998 with theHEGRA Cerenkov Telescope System in a search for gamma-ray emission at energies above similar to 1 TeV. An analysis of these data, similar to 65 hoursin total, resulted in no evidence for TeV gamma-ray emission. The 3 sigma upper limit to the gamma-ray flux (>1 TeV) from Tycho is estimated at 5.78 x 10(-13) photons cm(-2) s(-1), or 33 milli-Crab. We interpret our upper limit within the framework of the following scenarios: (1) that the observed hard X-ray tail is due to synchrotron emission. A lower limit on the magnetic field within Tycho may be estimated B greater than or equal to 22 muG, assuming that the RXTE-detected X-rays were due to synchrotron emission. However, using results from a detailed model of the ASCA emission, a more conservative lower limit B greater than or equal to 6 muG is derived. (2) The hadronic model of Drury and (3) the more recent time-dependent kinetic theory of Berezhko & Volk. Our upper limit lies within the range of predicted values of both hadronic models, according to uncertainties in physical parameters of Tycho, and shock acceleration details. In the latter case, the model was scaled to suit the parameters of Tycho and re-normalised to account for a simplification of the original model. We find that we cannot rule out Tycho as a potential contributor at an average level to the Galactic cosmic-ray flux.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/04/20 alle ore 04:10:02