STRUCTURAL TRANSITION in the NGC 6251 JET: AN INTERPLAY with the SUPERMASSIVE BLACK HOLE and ITS HOST GALAXY

Chih Yin Tseng; Keiichi Asada; Masanori Nakamura; Hung Yi Pu; Juan Carlos Algaba; Wen Ping Lo

doi:10.3847/1538-4357/833/2/288

STRUCTURAL TRANSITION in the NGC 6251 JET: AN INTERPLAY with the SUPERMASSIVE BLACK HOLE and ITS HOST GALAXY

Chih Yin Tseng, Keiichi Asada, Masanori Nakamura, Hung Yi Pu, Juan Carlos Algaba, Wen Ping Lo

Research output: Contribution to journal › Article › peer-review

28 Citations (Scopus)

Abstract

The structure of the NGC 6251 jet on the milliarcsecond scale is investigated using images taken with the European VLBI Network and the Very Long Baseline Array. We detect a structural transition of the jet from a parabolic to a conical shape at a distance of (1-2) ×10⁵ times the Schwarzschild radius from the central engine, which is close to the sphere of gravitational influence of the supermassive black hole (SMBH). We also examine the jet pressure profiles with the synchrotron minimum energy assumption to discuss the physical origin of the structural transition. The NGC 6251 jet, together with the M87 jet, suggests a fundamental process of structural transition in the jets of active galactic nuclei (AGNs). Collimated AGN jets are characterized by their external galactic medium, showing that AGN jets interplay with the SMBH and its host galaxy.

Original language	English
Article number	288
Journal	Astrophysical Journal
Volume	833
Issue number	2
DOIs	https://doi.org/10.3847/1538-4357/833/2/288
Publication status	Published - 2016 Dec 20
Externally published	Yes

Keywords

galaxies: active
galaxies: individual (NGC 6251)
galaxies: jets
radio continuum: galaxies

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.3847/1538-4357/833/2/288

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title = "STRUCTURAL TRANSITION in the NGC 6251 JET: AN INTERPLAY with the SUPERMASSIVE BLACK HOLE and ITS HOST GALAXY",

abstract = "The structure of the NGC 6251 jet on the milliarcsecond scale is investigated using images taken with the European VLBI Network and the Very Long Baseline Array. We detect a structural transition of the jet from a parabolic to a conical shape at a distance of (1-2) ×105 times the Schwarzschild radius from the central engine, which is close to the sphere of gravitational influence of the supermassive black hole (SMBH). We also examine the jet pressure profiles with the synchrotron minimum energy assumption to discuss the physical origin of the structural transition. The NGC 6251 jet, together with the M87 jet, suggests a fundamental process of structural transition in the jets of active galactic nuclei (AGNs). Collimated AGN jets are characterized by their external galactic medium, showing that AGN jets interplay with the SMBH and its host galaxy.",

keywords = "galaxies: active, galaxies: individual (NGC 6251), galaxies: jets, radio continuum: galaxies",

author = "Tseng, {Chih Yin} and Keiichi Asada and Masanori Nakamura and Pu, {Hung Yi} and Algaba, {Juan Carlos} and Lo, {Wen Ping}",

year = "2016",

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doi = "10.3847/1538-4357/833/2/288",

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T1 - STRUCTURAL TRANSITION in the NGC 6251 JET

T2 - AN INTERPLAY with the SUPERMASSIVE BLACK HOLE and ITS HOST GALAXY

AU - Tseng, Chih Yin

AU - Asada, Keiichi

AU - Nakamura, Masanori

AU - Pu, Hung Yi

AU - Algaba, Juan Carlos

AU - Lo, Wen Ping

PY - 2016/12/20

Y1 - 2016/12/20

N2 - The structure of the NGC 6251 jet on the milliarcsecond scale is investigated using images taken with the European VLBI Network and the Very Long Baseline Array. We detect a structural transition of the jet from a parabolic to a conical shape at a distance of (1-2) ×105 times the Schwarzschild radius from the central engine, which is close to the sphere of gravitational influence of the supermassive black hole (SMBH). We also examine the jet pressure profiles with the synchrotron minimum energy assumption to discuss the physical origin of the structural transition. The NGC 6251 jet, together with the M87 jet, suggests a fundamental process of structural transition in the jets of active galactic nuclei (AGNs). Collimated AGN jets are characterized by their external galactic medium, showing that AGN jets interplay with the SMBH and its host galaxy.

AB - The structure of the NGC 6251 jet on the milliarcsecond scale is investigated using images taken with the European VLBI Network and the Very Long Baseline Array. We detect a structural transition of the jet from a parabolic to a conical shape at a distance of (1-2) ×105 times the Schwarzschild radius from the central engine, which is close to the sphere of gravitational influence of the supermassive black hole (SMBH). We also examine the jet pressure profiles with the synchrotron minimum energy assumption to discuss the physical origin of the structural transition. The NGC 6251 jet, together with the M87 jet, suggests a fundamental process of structural transition in the jets of active galactic nuclei (AGNs). Collimated AGN jets are characterized by their external galactic medium, showing that AGN jets interplay with the SMBH and its host galaxy.

KW - galaxies: active

KW - galaxies: individual (NGC 6251)

KW - galaxies: jets

KW - radio continuum: galaxies

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STRUCTURAL TRANSITION in the NGC 6251 JET: AN INTERPLAY with the SUPERMASSIVE BLACK HOLE and ITS HOST GALAXY

Abstract

Keywords

ASJC Scopus subject areas

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