High-energy particle acceleration in the shell of a supernova remnant

Aharonian, FA
Akhperjanian, AG
Aye, KM
Bazer-Bachi, AR
Beilicke, M
Benbow, W
Berge, D
Berghaus, P
Bernlohr, K
Bolz, O
Boisson, C
Borgmeier, C
Breitling, F
Brown, AM
Gordo, JB
Chadwick, PM
Chitnis, VR
Chounet, LM
Cornils, R
Costamante, L
Degrange, B
Djannati-Atai, A
Drury, LO
Ergin, Tülün
Espigat, P
Feinstein, F
Fleury, P
Fontaine, G
Funk, S
Gallant, YA
Giebels, B
Gillessen, S
Goret, P
Guy, J
Hadjichristidis, C
Hauser, M
Heinzelmann, G
Henri, G
Hermann, G
Hinton, JA
Hofmann, W
Holleran, M
Horns, D
de Jager, OC
Jung, I
Kheilifi, B
Komin, N
Konopelko, A
Latham, IJ
Le Gallou, R
Lemoine, M
Lemiere, A
Leroy, N
Lohse, T
Marcowith, A
Masterson, C
McComb, TJL
de Naurois, M
Nolan, SJ
Noutsos, A
Orford, KJ
Osborne, JL
Ouchriff, M
Panter, M
Pelletier, G
Pita, S
Pohl, M
Puhlhofer, G
Punch, M
Raubenheimer, BC
Raue, M
Raux, J
Rayner, SM
Redondo, I
Reimer, A
Reimer, O
Ripken, J
Rivoal, M
Rob, L
Rolland, L
Rowell, G
Sahakian, V
Sauge, L
Schlenker, S
Schlickeiser, R
Schuster, C
Schwanke, U
Siewert, M
Sol, H
Steenkamp, R
Stegmann, C
Tavernet, JP
Theoret, CG
Tluczykont, M
van der Walt, DJ
Vasileiadis, G
Vincent, P
Visser, B
Volk, HJ
Wagner, SJ
A significant fraction of the energy density of the interstellar medium is in the form of high-energy charged particles ( cosmic rays)(1). The origin of these particles remains uncertain. Although it is generally accepted that the only sources capable of supplying the energy required to accelerate the bulk of Galactic cosmic rays are supernova explosions, and even though the mechanism of particle acceleration in expanding supernova remnant (SNR) shocks is thought to be well understood theoretically(2,3), unequivocal evidence for the production of high-energy particles in supernova shells has proven remarkably hard to find. Here we report on observations of the SNR RX J1713.7 - 3946 ( G347.3 - 0.5), which was discovered by ROSAT(4) in the X-ray spectrum and later claimed as a source of high-energy gamma-rays(5,6) of TeV energies (1 TeV = 10(12) eV). We present a TeV gamma-ray image of the SNR: the spatially resolved remnant has a shell morphology similar to that seen in X-rays, which demonstrates that very-high-energy particles are accelerated there. The energy spectrum indicates efficient acceleration of charged particles to energies beyond 100 TeV, consistent with current ideas of particle acceleration in young SNR shocks.


High Statistics Measurement of the Positron Fraction in Primary Cosmic Rays of 0.5-500 GeV with the Alpha Magnetic Spectrometer on the International Space Station
Accardo, L.; et. al. (2014-09-18)
A precision measurement by AMS of the positron fraction in primary cosmic rays in the energy range from 0.5 to 500 GeV based on 10.9 million positron and electron events is presented. This measurement extends the energy range of our previous observation and increases its precision. The new results show, for the first time, that above similar to 200 GeV the positron fraction no longer exhibits an increase with energy.
Low temperature plasma as a means to transform nanoparticle atomic structure
Üner, Necip Berker; Thimsen, E. (2018-07-01)
Low temperature plasma (LTP) is a highly nonequilibrium substance capable of increasing the specific free energy of mass that flows through it. Despite this attractive feature, there are few examples of the transformation of solid material with an equilibrium atomic structure into a material with a nonequilibrium atomic structure. As a proposed example of such a transformation, in this work, it is argued that the transformation of crystalline metal nanoparticles into amorphous metal nanoparticles is feasibl...
Measurement of helium flux and variability in low earth orbit with the Alpha Magnetic Spectrometer
Karagöz, Gülce; Demirköz, Melahat Bilge; Department of Physics (2022-2)
The Alpha Magnetic Spectrometer (AMS-02) is an unrivalled particle physics detec- tor with a large magnet whose aim is to search for anti-matter and dark matter by performing measurements on cosmic ray composition and flux. AMS-02 has been operating on the International Space Station (ISS) since its launch on the 16th May 2011, and is planned to operate along the lifetime of the ISS. AMS-02 has a unique design with a large acceptance and sensitive detection of cosmic rays, allowing one to better understand ...
Low-temperature absorption edge and photoluminescence in layered structured Tl2Ga2S3Se single crystals
Hasanlı, Nızamı (2012-11-01)
The absorption edge of undoped Tl2Ga2S3Se crystals have been studied through transmission and reflection measurements in the wavelength range 440-1100 nm and in the temperature range 10-300 K. The absorption edge was observed to shift toward lower energy values with increasing temperature. As a result, the rate of the indirect band gap variation with temperature gamma = -2.6 x 10(-4) eV/K and the absolute zero value of the band gap energy E-gi(0)=2.42 eV were obtained.
Measurement of the charge asymmetry in top quark pair production in pp collisions at root s=8 TeV using a template method
Khachatryan, V.; et. al. (American Physical Society (APS), 2016-02-01)
The charge asymmetry in the production of top quark and antiquark pairs is measured in proton-proton collisions at a center-of-mass energy of 8 TeV. The data, corresponding to an integrated luminosity of 19.6 fb(-1), were collected by the CMS experiment at the LHC. Events with a single isolated electron or muon, and four or more jets, at least one of which is likely to have originated from hadronization of a bottom quark, are selected. A template technique is used to measure the asymmetry in the distributio...
Citation Formats
F. Aharonian et al., “High-energy particle acceleration in the shell of a supernova remnant,” NATURE, pp. 75–77, 2004, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/35459.