Other
Scientific paper
Apr 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aprs.conf..207m&link_type=abstract
Astrophysical Phenomena Revealed by Space VLBI, Proceedings of the VSOP Symposium, held at the Institute of Space and astronauti
Other
Scientific paper
We present some early results on AGN and jets with the Chandra X-ray Observatory, highlighting high resolution spectroscopy using the High Energy Transmission Grating Spectrometer (HETGS). The quasar PKS 0637--752 was found to have a very bright X-ray jet whose shape is remarkably similar to that of the radio jet on a size scale of 100 kpc but the X-ray emission is still unexplainably bright. Two BL Lac objects, PKS 2155--304 and Mk 421, were observed with the spectrometer and found to have no strong absorption or emission features. Other radio loud AGN observed with the HETGS show simple power law spectra without obvious features. These AGN results stand in marked contrast to the line-rich spectrum of SS 433, a Galactic X-ray binary which has relativistic jets. Broadened X-ray emission lines of H- and He-like S and Si are used to show that the characteristic temperature of the jet is near 2.5 keV at its base.
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