Variability of extragalactic X-ray jets on kiloparsec scales
Variability of extragalactic X-ray jets on kiloparsec scales
复制标题
河外 X 射线射流在千秒差距尺度上的变化
DOI:
10.1038/s41550-023-01983-1
复制
发表时间:
2023
期刊:
影响因子:
14.1
通讯作者:
Clautice, Devon
中科院分区:
文献类型:
--
作者:
Meyer, Eileen T.;Shaik, Aamil;Tang, Yanbo;Reid, Nancy;Reddy, Karthik;Breiding, Peter;Georganopoulos, Markos;Chiaberge, Marco;Perlman, Eric;Clautice, Devon
Unexpectedly strong X-ray emission from extragalactic radio jets on kiloparsec scales has been one of the major discoveries of Chandra, the only X-ray observatory capable of sub-arcsecond-scale imaging. The origin of this X-ray emission, which appears as a second spectral component from that of the radio emission, has been debated for over two decades. The most commonly assumed mechanism is inverse-Compton upscattering of the cosmic microwave background by very low-energy electrons in a still highly relativistic jet. Under this mechanism, no variability in the X-ray emission is expected. Here we report the detection of X-ray variability in the large-scale jet population, using a novel statistical analysis of 53 jets with multiple Chandra observations. Taken as a population, we find that the distribution ofPvalues from a Poisson model is strongly inconsistent with steady emission, with a globalPvalue of 1.96 × 10−4under a Kolmogorov–Smirnov test against the expected uniform (0, 1) distribution. These results strongly imply that the dominant mechanism of X-ray production in kiloparsec-scale jets is synchrotron emission by a second population of electrons reaching multi-teraelectronvolt energies. X-ray variability on the timescale of months to a few years implies extremely small emitting volumes much smaller than the cross-section of the jet.
登录
查看更多内容
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:
10.3847/1538-4365/aca321
发表时间:
2022
期刊:
The Astrophysical Journal Supplement Series
影响因子:
--
作者:
Karthik Reddy;M. Georganopoulos;E. Meyer;M. Keenan;K. Kollmann
通讯作者:
K. Kollmann
影响因子:
6.5
作者:
Ben Bekhti, N.;Floer, L.;Staveley-Smith, L.
通讯作者:
Staveley-Smith, L.
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:
--
发表时间:
2021
期刊:
影响因子:
--
作者:
Tomohisa KAWASHIMA ;Ken. Ohsuga ;Hiroyuki R. Takahashi
通讯作者:
Hiroyuki R. Takahashi