DISCOVERY OF TeV GAMMA-RAY EMISSION FROM TYCHO’S SUPERNOVA REMNANT
By V. Acciari, E. Aliu, T. Arlen, T. Aune, M. Beilicke, W. Benbow, S. Bradbury, J. Buckley, V. Bugaev, K. Byrum and 75 more. 2011
159 citations recorded by the source corpus.
We report the discovery of TeV gamma-ray emission from the Type Ia supernova remnant (SNR) G120.1+1.4, known as Tycho's SNR. Observations performed in the period 2008–2010 with the VERITAS ground-based gamma-ray observatory reveal weak emission coming from the direction of the remnant, compatible with a point source located at 00h25m27.ˢ0, + 64°10′50″ (J2000). The TeV photon spectrum measured by VERITAS can be described with a power law dN/dE = C(E/3.42 TeV)−Γ with Γ = 1.95 ± 0.51stat ± 0.30sys and C = (1.55 ± 0.43stat ± 0.47sys) × 10−14 cm−2 s−1 TeV−1. The integral flux above 1 TeV corresponds to ∼0.9% of the steady Crab Nebula emission above the same energy, making it one of the weakest sources yet detected in TeV gamma rays. We present both leptonic and hadronic models that can describe the data. The lowest magnetic field allowed in these models is ∼80 μG, which may be interpreted as evidence for magnetic field amplification.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/e1d46a123a062c9e63e35a1def8ccc9598ea3d6b
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Citations in the corpus
- Diffusive propagation of cosmic rays from supernova remnants in the Galaxy. I: spectrum and chemical composition (2011, methodology): “On the other hand the recent gamma ray detection of the Tycho supernova remnant by the VERITAS Cherenkov telescope [14] and by the Fermi telescope [15] appear to be best fit by a model in which particle acceleration occurs efficiently [16].”
- Strong evidence for hadron acceleration in Tycho’s supernova remnant (2011, background): “We identify Tycho’s SNR, freshly detected by FermiLAT and VERITAS, as the best candidate for investigating the effects that particle acceleration produces at all observablewav - lengths, simultaneously using multiple set of data to constraint our model.”
- The origin of galactic cosmic rays (2013, unknown): “It has been argued that the spectrum of gamma rays observed by Fermi-LAT (Giordano et al. 2012) in the GeV range and by VERITAS (Acciari et al. 2011) in the TeV range can only be compatible with a hadronic origin (Morlino and Caprioli 2012).”
- Observational Signatures of Particle Acceleration in Supernova Remnants (2012, methodology): “Bykov et al. (2011a) modeled Tycho’s stripes assuming they are the result of the nonlinear evolution of the anisotropic CR-driven magnetic instability by (Bell, 2004; Vladimirov et al., 2009; Bykov et al., 2011b), and concluded that the structures should only occur in the shell section where the loc”