http://arxiv.org/abs/1402.4309
Origin of the TeV gamma ray emission from MGRO J2019+37 discovered by the Milagro experiment is investigated within the pulsar wind nebula (PWN) scenario using multiwavelength information on sources suggested to be associated with this object. We find that the PWN scenario is severely constrained by the upper limit on the radio flux from the region around MGRO J2019+37 given by the Giant Metrewave Radio Telescope (GMRT) as well as by the x-ray flux upper limit from SWIFT/XRT. Specifically, we find that within the synchrotron self-compton mechanism of production of TeV photons by electrons within the nebula, the GMRT and/or SWIFT/XRT flux upper limits impose upper limits of O($10^{-4}$ pc) on the effective characteristic size of the emission region within the PWN for an assumed distance of $\sim$ few kpc to the source. This is about four orders of magnitude less than the characteristic size of the emission region typically invoked in explaining the TeV emission from a “standard” PWN such as the Crab Nebula.
L. Saha and P. Bhattacharjee
Wed, 19 Feb 14
3/50
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