The TeV gamma-ray emission mechanism of PSR 1706−44 based on the multi-wavelength spectrum
نویسندگان
چکیده
PSR 1706−44 has been observed at energies above several hundred GeV in 2000 and 2001 using the CANGAROO-II 10m telescope. Above 1TeV, the spectrum is a steep power-law, which is consistent with previous results. However, the spectral index seems to change around 1TeV and becomes much flatter at lower energies. In addition, we analyzed Chandra X-Ray Observatory (Chandra) archival data to derive the X-ray spectra of the pulsar and the nebula, separately. The obtained X-ray spectrum indicates that the synchrotron peak energy appears to be above 10 keV. Combining the new results from CANGAROO-II and Chandra data, the detailed unpulsed multi-wavelength spectrum from radio to TeV energies was obtained. The new results put severe restrictions on both the magnetic field of the nebula and the maximum energy of parent electrons, which make it difficult to explain the TeV gamma-ray emission by the conventional synchrotron nebula model.
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