SwePub
Sök i SwePub databas

  Utökad sökning

Träfflista för sökning "WFRF:(Burger W.) srt2:(2020-2024)"

Sökning: WFRF:(Burger W.) > (2020-2024)

  • Resultat 1-10 av 34
Sortera/gruppera träfflistan
   
NumreringReferensOmslagsbildHitta
1.
  •  
2.
  •  
3.
  • Acharyya, A., et al. (författare)
  • Multiwavelength Observations of the Blazar PKS 0735+178 in Spatial and Temporal Coincidence with an Astrophysical Neutrino Candidate IceCube-211208A
  • 2023
  • Ingår i: Astrophysical Journal. - : Institute of Physics Publishing (IOPP). - 0004-637X .- 1538-4357. ; 954:1
  • Tidskriftsartikel (refereegranskat)abstract
    • We report on multiwavelength target-of-opportunity observations of the blazar PKS 0735+178, located 2 degrees .2 away from the best -fit position of the IceCube neutrino event IceCube-211208A detected on 2021 December 8. The source was in a high -flux state in the optical, ultraviolet, X-ray, and GeV ?-ray bands around the time of the neutrino event, exhibiting daily variability in the soft X-ray flux. The X-ray data from Swift-XRT and NuSTAR characterize the transition between the low-energy and high-energy components of the broadband spectral energy distribution (SED), and the ?-ray data from Fermi-LAT, VERITAS, and H.E.S.S. require a spectral cutoff near 100 GeV. Both the X-ray and ?-ray measurements provide strong constraints on the leptonic and hadronic models. We analytically explore a synchrotron self-Compton model, an external Compton model, and a lepto-hadronic model. Models that are entirely based on internal photon fields face serious difficulties in matching the observed SED. The existence of an external photon field in the source would instead explain the observed ?-ray spectral cutoff in both the leptonic and lepto-hadronic models and allow a proton jet power that marginally agrees with the Eddington limit in the lepto-hadronic model. We show a numerical lepto-hadronic model with external target photons that reproduces the observed SED and is reasonably consistent with the neutrino event despite requiring a high jet power.
  •  
4.
  •  
5.
  •  
6.
  • Aharonian, F., et al. (författare)
  • Search for the evaporation of primordial black holes with HESS
  • 2023
  • Ingår i: Journal of Cosmology and Astroparticle Physics. - : Institute of Physics Publishing (IOPP). - 1475-7516. ; :4
  • Tidskriftsartikel (refereegranskat)abstract
    • Primordial Black Holes (PBHs) are hypothetical black holes predicted to have been formed from density fluctuations in the early Universe. PBHs with an initial mass around 1014-1015 g are expected to end their evaporation at present times in a burst of particles and very-high-energy (VHE) gamma rays. Those gamma rays may be detectable by the High Energy Stereoscopic System (H.E.S.S.), an array of imaging atmospheric Cherenkov telescopes. This paper reports on the search for evaporation bursts of VHE gamma rays with H.E.S.S., ranging from 10 to 120 seconds, as expected from the final stage of PBH evaporation and using a total of 4816 hours of observations. The most constraining upper limit on the burst rate of local PBHs is 2000 pc-3 yr-1 for a burst interval of 120 seconds, at the 95% confidence level. The implication of these measurements for PBH dark matter are also discussed.
  •  
7.
  •  
8.
  •  
9.
  •  
10.
  •  
Skapa referenser, mejla, bekava och länka
  • Resultat 1-10 av 34
Typ av publikation
tidskriftsartikel (31)
forskningsöversikt (2)
konferensbidrag (1)
Typ av innehåll
refereegranskat (31)
övrigt vetenskapligt/konstnärligt (3)
Författare/redaktör
Berge, D. (11)
Montanari, A. (11)
Casanova, S. (11)
Joshi, V. (11)
Cerruti, M. (11)
Bulik, T. (11)
visa fler...
Chen, A. (11)
Aharonian, F. (11)
Becherini, Yvonne (11)
Brun, F. (11)
Ernenwein, J. -P (11)
Fontaine, G. (11)
Gabici, S. (11)
Giavitto, G. (11)
Holch, T. L. (11)
Horns, D. (11)
Jamrozy, M. (11)
Jung-Richardt, I. (11)
Katarzynski, K. (11)
Khelifi, B. (11)
Kosack, K. (11)
Lemiere, A. (11)
Lenain, J. -P (11)
Moulin, E. (11)
Niemiec, J. (11)
Quirrenbach, A. (11)
Reimer, O. (11)
Rieger, F. (11)
Rudak, B. (11)
Sahakian, V. (11)
Sasaki, M. (11)
Takahashi, T. (11)
Wierzcholska, A. (11)
Zacharias, M. (11)
Zdziarski, A. A. (11)
Zywucka, N. (11)
Marx, R. (11)
Caroff, S. (11)
Chand, T. (11)
Glawion, D. (11)
Kostunin, D. (11)
Mackey, J. (11)
Prokhorov, D. A. (11)
Kasai, E. (11)
Mitchell, A. (11)
Olivera-Nieto, L. (11)
Panny, S. (11)
Steinmassl, S. (11)
Zargaryan, D. (11)
Leuschner, F. (11)
visa färre...
Lärosäte
Karolinska Institutet (13)
Linnéuniversitetet (11)
Lunds universitet (8)
Uppsala universitet (5)
Göteborgs universitet (3)
Kungliga Tekniska Högskolan (1)
visa fler...
Luleå tekniska universitet (1)
Stockholms universitet (1)
visa färre...
Språk
Engelska (34)
Forskningsämne (UKÄ/SCB)
Medicin och hälsovetenskap (15)
Naturvetenskap (13)
Samhällsvetenskap (1)

År

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy