A Hubble Space Telescope Survey of Extended [O III] λ5007 Emission in a Far-Infrared Selected Sample of Seyfert Galaxies: Observations

By H. Schmitt, J. Donley, R. Antonucci, J. Hutchings, A. Kinney. 2003

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We present a Hubble Space Telescope (HST) survey of extended [O III] emission for a sample of 60 Seyfert galaxies (22 Seyfert 1 galaxies and 38 Seyfert 2 galaxies), selected based on their far-infrared properties. The observations for 42 of these galaxies were done in a snapshot survey with WFPC2. The remaining 18 were obtained from the HST archive, most of which were observed with the same configuration. These observations cover 68% of the objects in the sample defined by Kinney et al. and create a valuable data set for the study of the narrow-line region (NLR) properties of Seyfert galaxies. In this paper, we present the details of the observations, reductions, and measurements. We also discuss the extended structure of individual sources, and the relation of this emission to the radio and host galaxy morphology. We also address how representative the subsample of [O III]-imaged galaxies is of the entire sample, and possible selection effects that may affect this comparison of the properties of Seyfert 1 and Seyfert 2 galaxies.

Subfields: Astronomy and Astrophysics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/64399d01f4c5d76362a5be8f4a27c8d181969f58

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Citations in the corpus

• The soft X-ray/NLR connection: a single photoionized medium? (2005, methodology): “The complete Schmitt et al. (2003a) catalog is selected on the basis of 60µm luminosities and warm 25/60µm colors, in order to avoid starburst galaxies and orientation biases, and includes only Seyfert galaxies withz < 0.031.”
• A Survey of Kiloparsec-Scale Radio Outflows in Radio-Quiet Active Galactic Nuclei (2006, methodology): “There is also a plume of [O iii] k5007 emission extending 1B7 (320 pc) along this axis (Schmitt et al. 2003).”
• A Hubble Space Telescope Survey of Extended [O III] λ5007 Å Emission in a Far-Infrared-Selected Sample of Seyfert Galaxies: Results (2003, methodology): “Since both types have similar L([OIII])int distributions (Schmitt et al. 2003), we conclude that the emission is more concentrated towards the nucleus in Seyfert 1’s. Comparing the L([OIII])nuc distributions using the KS test, we find that there is only a 0.14% chance that two samples drawn from…”
• Determining Inclinations of Active Galactic Nuclei Via Their Narrow-Line Region Kinematics (2012, methodology): “Through the Unified Model, the central engine is obstructed by an optically thick disk (Antonucci 1993) such that a majority of the ionizing radiation is collimated into a biconical structure that has been observed to vary in opening angle amongst different AGN (Schmitt et al. 2003).”
• THE LICK AGN MONITORING PROJECT: BROAD-LINE REGION RADII AND BLACK HOLE MASSES FROM REVERBERATION MAPPING OF Hβ (2009, background): “…quoted by Whittle (1992) are generally smaller than those employed here; however, narrow-band [OIII ] imaging of a subset of our sample by Schmitt et al. (2003) shows that the vast majority of the [OIII ] emission comes from a fairly compact region of∼ 1′′ in width. where measurements…”
• New Spectral Model for Constraining Torus Covering Factors from Broadband X-Ray Spectra of Active Galactic Nuclei (2018, background): “For IC 5063, Schmitt et al. (2003) found that the ionization cone has a half-opening angle of ' 30◦, and that it is aligned well with the jet observed at radio frequencies.”
• Size and properties of the narrow-line region in Seyfert-1 galaxies from spatially-resolved optical spectroscopy (2006, methodology): “This discrepancy is explained by Schmitt et al. (2003) by the limited field-of-view of the linear-ramp filter (∼13′′), but can also be due to less sensitivity of the 800 s exposure taken with the 2.4 m HST mirror compared to the 900 s exposure using the 4 m CTIO telescope.”
• TORUS AND ACTIVE GALACTIC NUCLEUS PROPERTIES OF NEARBY SEYFERT GALAXIES: RESULTS FROM FITTING INFRARED SPECTRAL ENERGY DISTRIBUTIONS AND SPECTROSCOPY (2011, background): “Second, the presence of double-cone morphology of the narrow line region (NLR) structures (e.g., Pogge 1989; Wilson & Tsvetanov 1996; Schmitt et al. 2003), with orientations similar to those of radio jets (Nagar et al. 1999 and references therein), are interpreted as emission collimated by the…”
• OUTFLOWS FROM ACTIVE GALACTIC NUCLEI: KINEMATICS OF THE NARROW-LINE AND CORONAL-LINE REGIONS IN SEYFERT GALAXIES, (2011, methodology): “However, when comparing ground-based [O iii] images of Seyfert galaxies from Mulchaey et al. (1996) with the HST snapshot survey of Schmitt et al. (2003), the latter reveal, on average, four times smaller NLR sizes, probably due to low sensitivity (quick exposures).”