A Chandra survey of quasar jets:: First results

被引:133
作者
Marshall, HL
Schwartz, DA
Lovell, JEJ
Murphy, DW
Worrall, DM
Birkinshaw, M
Gelbord, JM
Perlman, ES
Jauncey, DL
机构
[1] MIT, Ctr Space Res, Cambridge, MA 02139 USA
[2] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
[3] CSIRO, Australia Telescope Natl Facil, Epping, NSW 2121, Australia
[4] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA
[5] Univ Bristol, Dept Phys, Bristol BS8 1TL, Avon, England
[6] Univ Maryland Baltimore Cty, Joint Ctr Astrophys, Baltimore, MD USA
[7] Univ Maryland Baltimore Cty, Dept Phys, Baltimore, MD USA
关键词
galaxies : active; quasars : general;
D O I
10.1086/425578
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present results from Chandra X-ray imaging and spectroscopy of a flux-limited sample of flat-spectrum radio-emitting quasars with jetlike extended structure. Twelve of 20 quasar jets are detected in 5 ks ACIS-S exposures. The quasars without X-ray jets are not significantly different from those in the sample with detected jets except that the extended radio emission is generally fainter. New radio maps are combined with the X-ray images in order to elucidate the relation between radio and X-ray emission in spatially resolved structures. We find a variety of morphologies, including long straight jets and bends up to 90degrees. All X-ray jets are one-sided although the radio images used for source selection often show lobes opposite the X-ray jets. The FR II X-ray jets can all be interpreted as inverse Compton scattering of cosmic microwave background photons by electrons in large-scale relativistic jets although deeper observations are required to test this interpretation in detail. Applying this interpretation to the jets as a population, we find that the jets would be aligned to within 30degrees of the line of sight generally, assuming that the bulk Lorentz factor of the jets is 10.
引用
收藏
页码:13 / 33
页数:21
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