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Discovery of the first LBL/IBL Objects at Very High Energy Gamma-Rays

  • Kartonierter Einband
  • 140 Seiten
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20 years after the discovery of the Crab Nebula as a source of very high energy (VHE) gamma-rays, the number of sources discovered... Weiterlesen
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Beschreibung

20 years after the discovery of the Crab Nebula as a source of very high energy (VHE) gamma-rays, the number of sources discovered 100 GeV using Cherenkov telescopes has quickly grown to almost 100. This book focuses on the search for emission from a particular type of blazars previously undetected at VHE gamma-rays: low-peaked (LBL) and intermediate-peaked (IBL) BL Lacertae objects. These sources emit non-thermal radiation, and exhibit a peak in their radio-to-X-ray spectral energy distribution at UV/IR energies. They dominate source counts from space-borne observations at gamma-ray energies 10 GeV, with spectra that show power-law extensions to higher energies, though theoretical models suggest a turn over at energies 100 GeV. The search was narrowed to the prominent sources BL Lac, W-Comae and S5-0716. Their detections are in line with theoretical expectations, but strain models based on electron shock acceleration and Inverse- Compton cooling. Short variability time scales around one day observed at VHE show that the gamma- rays originate close to the putative supermassive black holes in the centers of blazars, corresponding to 1000 Schwarzschild radii.

Autorentext

Karsten Berger, Dr.rer.nat.: Study of physics with emphasis on astroparticle physics at the University of Würzburg, Germany, dissertation in the year 2009.

Produktinformationen

Titel: Discovery of the first LBL/IBL Objects at Very High Energy Gamma-Rays
Untertitel: Characterization of Low-Peaked (LBL) and Intermediate-Peaked (IBL) BL Lacertae Objects and Description of the Observation Technique
Autor:
EAN: 9783838110639
ISBN: 978-3-8381-1063-9
Format: Kartonierter Einband
Herausgeber: Südwestdeutscher Verlag für Hochschulschriften AG
Genre: Sonstiges
Anzahl Seiten: 140
Gewicht: 225g
Größe: H220mm x B150mm x T8mm
Jahr: 2015