Offsets between X-Ray and Radio Components in X-Ray Jets: The AtlasX
Offsets between X-Ray and Radio Components in X-Ray Jets: The AtlasX
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X 射线喷射器中 X 射线和无线电组件之间的偏移:AtlasX
DOI:
10.3847/1538-4365/aca321
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
K. Kollmann
中科院分区:
文献类型:
--
作者:
Karthik Reddy;M. Georganopoulos;E. Meyer;M. Keenan;K. Kollmann
The X-ray emission mechanism of powerful extragalactic jets—which has important implications for their environmental impacts—is poorly understood. The X-ray/radio positional offsets in the individual features of jets provide important clues. Extending previous work in Reddy et al., we present a detailed comparison between X-ray maps, deconvolved using the Low-count Image Reconstruction and Analysis tool, and radio maps of 164 components from 77 Chandra-detected X-ray jets. We detect 94 offsets (57%), with 58 new detections. In FR II–type jet knots, the X-rays peak and decay before the radio in about half the cases, disagreeing with the predictions of one-zone models. While a similar number of knots lack statistically significant offsets, we argue that projection and distance effects result in offsets below the detection level. Similar deprojected offsets imply that X-rays could be more compact than radio for most knots, and we qualitatively reproduce this finding with a “moving-knot” model. The bulk Lorentz factor (Γ) derived for knots under this model is consistent with previous radio-based estimates, suggesting that kiloparsec-scale jets are only mildly relativistic. An analysis of the X-ray/radio flux ratio distributions does not support the commonly invoked mechanism of X-ray production from inverse Compton scattering of the cosmic microwave background, but does show a marginally significant trend of declining flux ratio as a function of the distance from the core. Our results imply the need for multi-zone models to explain the X-ray emission from powerful jets. We provide an interactive list of our X-ray jet sample at http://astro.umbc.edu/Atlas-X.
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DOI:
10.3847/1538-4357/aaaf66
发表时间:
2018-02
期刊:
The Astrophysical Journal
影响因子:
--
作者:
H. Marshall;J. Gelbord;D. Worrall;M. Birkinshaw;D. Schwartz;D. Jauncey;G. Griffiths;D. Murphy
通讯作者:
H. Marshall;J. Gelbord;D. Worrall;M. Birkinshaw;D. Schwartz;D. Jauncey;G. Griffiths;D. Murphy
DOI:
10.1111/j.1365-2966.2007.11962.x
发表时间:
2007
影响因子:
4.8
作者:
Erlund M
通讯作者:
Erlund M
影响因子:
4.8
作者:
Rawes J
通讯作者:
Rawes J
DOI:
10.3847/1538-4365/abd8d7
发表时间:
2021
期刊:
The Astrophysical Journal Supplement Series
影响因子:
--
作者:
Reddy, Karthik;Georganopoulos, Markos;Meyer, Eileen T.
通讯作者:
Meyer, Eileen T.
DOI:
10.3847/2041-8213/ab3db3
发表时间:
2019-08
期刊:
The Astrophysical Journal Letters
影响因子:
--
作者:
E. Meyer;Adurshsiva R. Iyer;Karthik Reddy;M. Georganopoulos;Peter Breiding;M. Keenan
通讯作者:
E. Meyer;Adurshsiva R. Iyer;Karthik Reddy;M. Georganopoulos;Peter Breiding;M. Keenan