Discovery of a faint optical jet in 3C 120

J. Hjorth; Marianne Vestergaard; A. N. Sorensen; F. Grundahl

doi:10.1086/309701

Discovery of a faint optical jet in 3C 120

J. Hjorth, Marianne Vestergaard, A. N. Sorensen, F. Grundahl

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Abstract

We report the detection of an optical jet in the nearby Seyfert 1 radio galaxy 3C 120. The optical jet coincides with the well-known radio jet and emits continuum radiation (B,V',I) with a radio-to-optical spectral index of 0.65. There are no clear optical counterparts to the radio knots, although the optical condensation A of the galaxy, which includes the bright 4" radio knot, is found to be 12 % polarized with the electric field vectors perpendicular to the jet. These findings indicate that 3C 120 contains the 6th known extragalactic optical synchrotron jet, quite similar in its properties to the jet of PKS 0521-36. The outer parts of the jet is the faintest known optical jet and was discovered as the result of a dedicated effort to detect it. It is therefore possible that more optical jets can be discovered in systematic searches by combining deep imaging in the optical or near-IR with careful galaxy subtraction methods.

Originalsprog	Engelsk
Artikelnummer	L17
Tidsskrift	Astrophysical Journal Letters
Vol/bind	452
Udgave nummer	1
ISSN	0004-637X
DOI	https://doi.org/10.1086/309701
Status	Udgivet - 22 jun. 1995

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title = "Discovery of a faint optical jet in 3C 120",

abstract = "We report the detection of an optical jet in the nearby Seyfert 1 radio galaxy 3C 120. The optical jet coincides with the well-known radio jet and emits continuum radiation (B,V',I) with a radio-to-optical spectral index of 0.65. There are no clear optical counterparts to the radio knots, although the optical condensation A of the galaxy, which includes the bright 4{"} radio knot, is found to be 12 % polarized with the electric field vectors perpendicular to the jet. These findings indicate that 3C 120 contains the 6th known extragalactic optical synchrotron jet, quite similar in its properties to the jet of PKS 0521-36. The outer parts of the jet is the faintest known optical jet and was discovered as the result of a dedicated effort to detect it. It is therefore possible that more optical jets can be discovered in systematic searches by combining deep imaging in the optical or near-IR with careful galaxy subtraction methods.",

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author = "J. Hjorth and Marianne Vestergaard and Sorensen, {A. N.} and F. Grundahl",

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T1 - Discovery of a faint optical jet in 3C 120

AU - Hjorth, J.

AU - Vestergaard, Marianne

AU - Sorensen, A. N.

AU - Grundahl, F.

PY - 1995/6/22

Y1 - 1995/6/22

N2 - We report the detection of an optical jet in the nearby Seyfert 1 radio galaxy 3C 120. The optical jet coincides with the well-known radio jet and emits continuum radiation (B,V',I) with a radio-to-optical spectral index of 0.65. There are no clear optical counterparts to the radio knots, although the optical condensation A of the galaxy, which includes the bright 4" radio knot, is found to be 12 % polarized with the electric field vectors perpendicular to the jet. These findings indicate that 3C 120 contains the 6th known extragalactic optical synchrotron jet, quite similar in its properties to the jet of PKS 0521-36. The outer parts of the jet is the faintest known optical jet and was discovered as the result of a dedicated effort to detect it. It is therefore possible that more optical jets can be discovered in systematic searches by combining deep imaging in the optical or near-IR with careful galaxy subtraction methods.

AB - We report the detection of an optical jet in the nearby Seyfert 1 radio galaxy 3C 120. The optical jet coincides with the well-known radio jet and emits continuum radiation (B,V',I) with a radio-to-optical spectral index of 0.65. There are no clear optical counterparts to the radio knots, although the optical condensation A of the galaxy, which includes the bright 4" radio knot, is found to be 12 % polarized with the electric field vectors perpendicular to the jet. These findings indicate that 3C 120 contains the 6th known extragalactic optical synchrotron jet, quite similar in its properties to the jet of PKS 0521-36. The outer parts of the jet is the faintest known optical jet and was discovered as the result of a dedicated effort to detect it. It is therefore possible that more optical jets can be discovered in systematic searches by combining deep imaging in the optical or near-IR with careful galaxy subtraction methods.

KW - astro-ph

U2 - 10.1086/309701

DO - 10.1086/309701

M3 - Journal article

SN - 0004-637X

VL - 452

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 1

M1 - L17

ER -

Discovery of a faint optical jet in 3C 120

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