Spatially resolved ultraviolet spectra of the high-velocity nuclear outflow of NGC 1068

Brent A. Groves; Gerald Cecil; Pierre Ferruit; Michael A. Dopita

doi:10.1086/422249

Spatially resolved ultraviolet spectra of the high-velocity nuclear outflow of NGC 1068

Brent A. Groves^*, Gerald Cecil, Pierre Ferruit, Michael A. Dopita

^*Corresponding author for this work

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

26 Citations (Scopus)

Abstract

We present ultraviolet emission-line maps of the narrow-line region (NLR) of NGC 1068. The maps span 115-318 nm, the biconical ionization cone, and several posited jet-ISM interactions, and the compact knots whose optical spectra we reported previously resemble kinematically the quasar associated absorption line systems. Across the NLR, we find that ultraviolet flux ratios are consistent with photoionization, not shock excitation, even for gas blueshifted abruptly to 3000 km s^-1 relative to galaxy systemic velocity or for gas projected near the radio jet. The knots may be radiatively accelerated, photoablated fragments of molecular clouds.

Original language	English
Pages (from-to)	786-794
Number of pages	9
Journal	Astrophysical Journal
Volume	611
Issue number	2 I
DOIs	https://doi.org/10.1086/422249
Publication status	Published - 20 Aug 2004

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@article{c37d452493b74d1881638bac437251ef,

title = "Spatially resolved ultraviolet spectra of the high-velocity nuclear outflow of NGC 1068",

abstract = "We present ultraviolet emission-line maps of the narrow-line region (NLR) of NGC 1068. The maps span 115-318 nm, the biconical ionization cone, and several posited jet-ISM interactions, and the compact knots whose optical spectra we reported previously resemble kinematically the quasar associated absorption line systems. Across the NLR, we find that ultraviolet flux ratios are consistent with photoionization, not shock excitation, even for gas blueshifted abruptly to 3000 km s-1 relative to galaxy systemic velocity or for gas projected near the radio jet. The knots may be radiatively accelerated, photoablated fragments of molecular clouds.",

keywords = "Galaxies: Seyfert, Galaxies: active, Galaxies: individual (NGC 1068), Galaxies: kinematics and dynamics",

author = "Groves, {Brent A.} and Gerald Cecil and Pierre Ferruit and Dopita, {Michael A.}",

year = "2004",

month = aug,

day = "20",

doi = "10.1086/422249",

language = "English",

volume = "611",

pages = "786--794",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "2 I",

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TY - JOUR

T1 - Spatially resolved ultraviolet spectra of the high-velocity nuclear outflow of NGC 1068

AU - Groves, Brent A.

AU - Cecil, Gerald

AU - Ferruit, Pierre

AU - Dopita, Michael A.

PY - 2004/8/20

Y1 - 2004/8/20

N2 - We present ultraviolet emission-line maps of the narrow-line region (NLR) of NGC 1068. The maps span 115-318 nm, the biconical ionization cone, and several posited jet-ISM interactions, and the compact knots whose optical spectra we reported previously resemble kinematically the quasar associated absorption line systems. Across the NLR, we find that ultraviolet flux ratios are consistent with photoionization, not shock excitation, even for gas blueshifted abruptly to 3000 km s-1 relative to galaxy systemic velocity or for gas projected near the radio jet. The knots may be radiatively accelerated, photoablated fragments of molecular clouds.

AB - We present ultraviolet emission-line maps of the narrow-line region (NLR) of NGC 1068. The maps span 115-318 nm, the biconical ionization cone, and several posited jet-ISM interactions, and the compact knots whose optical spectra we reported previously resemble kinematically the quasar associated absorption line systems. Across the NLR, we find that ultraviolet flux ratios are consistent with photoionization, not shock excitation, even for gas blueshifted abruptly to 3000 km s-1 relative to galaxy systemic velocity or for gas projected near the radio jet. The knots may be radiatively accelerated, photoablated fragments of molecular clouds.

KW - Galaxies: Seyfert

KW - Galaxies: active

KW - Galaxies: individual (NGC 1068)

KW - Galaxies: kinematics and dynamics

UR - http://www.scopus.com/inward/record.url?scp=6044260348&partnerID=8YFLogxK

U2 - 10.1086/422249

DO - 10.1086/422249

M3 - Article

SN - 0004-637X

VL - 611

SP - 786

EP - 794

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2 I

ER -

Spatially resolved ultraviolet spectra of the high-velocity nuclear outflow of NGC 1068

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