Omar Tibolla

Gamma-rays from pulsar wind nebulae in starburst galaxies

Abstract Recently, gamma-ray emission at TeV energies has been detected from the starburst galaxies NGC253 (Acero et al., 2009) [1] and M82 (Acciari et al., 2009) [2] . It has been claimed that pion production due to cosmic rays accelerated in supernova remnants interacting with the interstellar gas is responsible for the observed gamma rays. Here, we show that the gamma-ray pulsar wind nebulae left behind by the supernovae contribute to the TeV luminosity in a major way. A single pulsar wind nebula produces about ten times the total luminosity of the Sun at energies above 1xa0TeV during a lifetime of 105 years. A large number of 3xa0×xa0104 pulsar wind nebulae expected in a typical starburst galaxy at a distance of 4 Mpc can readily produce the observed TeV gamma rays.

No X-Ray Excess from the HESS J1741−302 Region, except for a New Intermediate Polar Candidate

With the Suzaku satellite, we observed an unidentified TeV gamma-ray source HESS J1741

GRIPS and its strong connections to the GeV and TeV bands

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HESS J1741-302: a new source discovered in the Galactic Center region

302 and its surroundings. No diffuse or point-like X-ray sources are detected from the bright southern emission peak of HESS J1741

New unidentified H.E.S.S. Galactic sources

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Are most of the VHE gamma-ray unidentified sources relic PWNe?

302. From its neighborhood, we found a new intermediate polar candidate at the position of

Nuclear lines revealing the injection of cosmic rays in supernova remnants

(alpha, delta)_{rm J2000.0} = (timeform{17h40m35.6s}, timeform{-30D14m16s})

A search for VHE counterparts of galactic Fermi sources

, which is designated as Suzaku J174035.6

The 2013 multiwavelength campaign on the Narrow-Line Seyfert 1 galaxy 1H 0323+342: a rosetta stone for the jet/disk paradigm

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Cosmic Ray Origin – Beyond the Standard Models

301416. The spectrum of Suzaku J174035.6