Journal
NATURE COMMUNICATIONS
Volume 11, Issue 1, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-019-14093-2
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Funding
- National Key R&D Programme of China [2018YFA0404603]
- Chinese Academy of Sciences (CAS) [114231KYSB20170003]
- Hungarian National Research, Development and Innovation Office [2018-2.1.14-TET-CN-2018-00001]
- CAS-PIFI [2016PM024]
- NSFC [11650110438]
- Hungarian Academy of Sciences
- New National Excellence Program of the Ministry for Innovation and Technology [uNKP-19-4]
- Very Long Baseline Array of the National Radio Astronomy Observatory [BR093, BG154, BZ068, BZ071]
- NASA [NNX08AW31G, NNX11A043G, NNX14AQ89G]
- NSF [AST-0808050, AST-1109911]
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Blazars are a sub-class of quasars with Doppler boosted jets oriented close to the line of sight, and thus efficient probes of supermassive black hole growth and their environment, especially at high redshifts. Here we report on Very Long Baseline Interferometry observations of a blazar J0906+6930 at z=5.47, which enabled the detection of polarised emission and measurement of jet proper motion at parsec scales. The observations suggest a less powerful jet compared with the general blazar population, including lower proper motion and bulk Lorentz factor. This coupled with a previously inferred high accretion rate indicate a transition from an accretion radiative power to a jet mechanical power based transfer of energy and momentum to the surrounding gas. While alternative scenarios could not be fully ruled out, our results indicate a possibly nascent jet embedded in and interacting with a dense medium resulting in a jet bending.
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