Clues to Quasar Broad Line Region Geometry and Kinematics

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Clues to Quasar Broad Line Region Geometry and Kinematics. / Vestergaard, Marianne; Wilkes, B. J.; Barthel, P. D.

I: Astrophysical Journal Letters, Bind 538, Nr. 2, L103, 12.06.2000.

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt

Harvard

Vestergaard, M, Wilkes, BJ & Barthel, PD 2000, 'Clues to Quasar Broad Line Region Geometry and Kinematics', Astrophysical Journal Letters, bind 538, nr. 2, L103. https://doi.org/10.1086/312805

APA

Vestergaard, M., Wilkes, B. J., & Barthel, P. D. (2000). Clues to Quasar Broad Line Region Geometry and Kinematics. Astrophysical Journal Letters, 538(2), [L103]. https://doi.org/10.1086/312805

Vancouver

Vestergaard M, Wilkes BJ, Barthel PD. Clues to Quasar Broad Line Region Geometry and Kinematics. Astrophysical Journal Letters. 2000 jun. 12;538(2). L103. https://doi.org/10.1086/312805

Author

Vestergaard, Marianne ; Wilkes, B. J. ; Barthel, P. D. / Clues to Quasar Broad Line Region Geometry and Kinematics. I: Astrophysical Journal Letters. 2000 ; Bind 538, Nr. 2.

Bibtex

@article{ed39f936c9924e90a1edcc38c93059df,
title = "Clues to Quasar Broad Line Region Geometry and Kinematics",
abstract = "We present evidence that the high-velocity CIV lambda 1549 emission line gas of radio-loud quasars may originate in a disk-like configuration, in close proximity to the accretion disk often assumed to emit the low-ionization lines. For a sample of 36 radio-loud z~2 quasars we find the 20--30% peak width to show significant inverse correlations with the fractional radio core-flux density, R, the radio axis inclination indicator. Highly inclined systems have broader line wings, consistent with a high-velocity field perpendicular to the radio axis. By contrast, the narrow line-core shows no such relation with R, so the lowest velocity CIV-emitting gas has an inclination independent velocity field. We propose that this low-velocity gas is located at higher disk-altitudes than the high-velocity gas. A planar origin of the high-velocity CIV-emission is consistent with the current results and with an accretion disk-wind emitting the broad lines. A spherical distribution of randomly orbiting broad-line clouds and a polar high-ionization outflow are ruled out.",
keywords = "astro-ph",
author = "Marianne Vestergaard and Wilkes, {B. J.} and Barthel, {P. D.}",
year = "2000",
month = jun,
day = "12",
doi = "10.1086/312805",
language = "English",
volume = "538",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "Institute of Physics Publishing, Inc",
number = "2",

}

RIS

TY - JOUR

T1 - Clues to Quasar Broad Line Region Geometry and Kinematics

AU - Vestergaard, Marianne

AU - Wilkes, B. J.

AU - Barthel, P. D.

PY - 2000/6/12

Y1 - 2000/6/12

N2 - We present evidence that the high-velocity CIV lambda 1549 emission line gas of radio-loud quasars may originate in a disk-like configuration, in close proximity to the accretion disk often assumed to emit the low-ionization lines. For a sample of 36 radio-loud z~2 quasars we find the 20--30% peak width to show significant inverse correlations with the fractional radio core-flux density, R, the radio axis inclination indicator. Highly inclined systems have broader line wings, consistent with a high-velocity field perpendicular to the radio axis. By contrast, the narrow line-core shows no such relation with R, so the lowest velocity CIV-emitting gas has an inclination independent velocity field. We propose that this low-velocity gas is located at higher disk-altitudes than the high-velocity gas. A planar origin of the high-velocity CIV-emission is consistent with the current results and with an accretion disk-wind emitting the broad lines. A spherical distribution of randomly orbiting broad-line clouds and a polar high-ionization outflow are ruled out.

AB - We present evidence that the high-velocity CIV lambda 1549 emission line gas of radio-loud quasars may originate in a disk-like configuration, in close proximity to the accretion disk often assumed to emit the low-ionization lines. For a sample of 36 radio-loud z~2 quasars we find the 20--30% peak width to show significant inverse correlations with the fractional radio core-flux density, R, the radio axis inclination indicator. Highly inclined systems have broader line wings, consistent with a high-velocity field perpendicular to the radio axis. By contrast, the narrow line-core shows no such relation with R, so the lowest velocity CIV-emitting gas has an inclination independent velocity field. We propose that this low-velocity gas is located at higher disk-altitudes than the high-velocity gas. A planar origin of the high-velocity CIV-emission is consistent with the current results and with an accretion disk-wind emitting the broad lines. A spherical distribution of randomly orbiting broad-line clouds and a polar high-ionization outflow are ruled out.

KW - astro-ph

U2 - 10.1086/312805

DO - 10.1086/312805

M3 - Journal article

VL - 538

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 2

M1 - L103

ER -

ID: 123369020