Astrophys. J., 542, 655-666 (2000/October-3)
The Chandra X-ray observatory resolves the X-ray morphology and spectra of a jet in PKS 0637-752.
CHARTAS G., WORRALL D.M., BIRKINSHAW M., CRESITELLO-DITTMAR M., CUI W., GHOSH K.K., HARRIS D.E., HOOPER E.J., JAUNCEY D.L., KIM D.-W., LOVELL J., MATHUR S., SCHWARTZ D.A., TINGAY S.J., VIRANI S.N. and WILKES B.J.
Abstract (from CDS):
The core-dominated radio-loud quasar PKS 0637-752 (z=0.654) was the first celestial object observed with the Chandra X-Ray Observatory, offering the early surprise of the detection of a remarkable X-ray jet. Several observations with a variety of detector configurations contribute to a total exposure time with the Chandra ACIS of about 100 ks. A spatial analysis of all the available X-ray data, making use of Chandra's spatial resolving power of about 0".4, reveals a jet that extends about 10" to the west of the nucleus. At least four X-ray knots are resolved along the jet, which contains about 5% of the overall X-ray luminosity of the source. Previous observations of PKS 0637-752 in the radio band had identified a kiloparsec-scale radio jet extending to the west of the quasar. The X-ray and radio jets are similar in shape, intensity distribution, and angular structure out to about 9", after which the X-ray brightness decreases more rapidly and the radio jet turns abruptly to the north. The X-ray luminosity of the total source is logLX~45.8 ergs.s–1 (2-10 keV) and appears not to have changed since it was observed with ASCA in 1996 November. We present the results of fitting a variety of emission models to the observed spectral distribution, comment on the nonexistence of emission lines recently reported in the ASCA observations of PKS 0637-752, and briefly discuss plausible X-ray emission mechanisms.
Galaxies: Active - Galaxies: Jets - Galaxies: Quasars: Individual: Alphanumeric: PKS 0637-752 - X-Rays: Galaxies
Table 6: objects CXO are CXOU JHHMMSS.s+DDMMSS in SIMBAD
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