Galaxy Zoo Talk

Hubble Space Telescope Observations of Extended [O III] λ5007 Emission in Nearby QSO2s: New Constraints On AGN / Host Galaxy Interaction.

  • Ghost_Sheep_SWR by Ghost_Sheep_SWR

    Hubble Space Telescope Observations of Extended [O III] λ5007 Emission in Nearby QSO2s: New Constraints On AGN / Host Galaxy Interaction.

    *Travis C. Fischer1†, S. B. Kraemer2, H. R. Schmitt3, L.F. Longo Micchi2, D. M. Crenshaw4, M. Revalski4∗, M.
    Vestergaard5,6, M. Elvis7, C. M. Gaskell8, F. Hamann9, L. C. Ho10, J. Hutchings11, R. Mushotsky12, H.
    Netzer13, T. Storchi-Bergmann14, A. Straughn1, T. J. Turner15, M. J. Ward16

    Draft version February 20, 2018*

    We present a Hubble Space Telescope (HST) survey of extended [O III] _5007 emission for a sample
    of 12 nearby (z {0.12), luminous Type 2 quasars (QSO2s), which we use to measure the extent
    and kinematics of their AGN-ionized gas. We find the size of the observed [O III] regions scale with
    luminosity in comparison to nearby, less luminous Seyfert galaxies and radially outflowing kinematics
    to exist in all targets. We report an average maximum outflow radius of ∼600 pc, with gas continuing
    to be kinematically influenced by the central AGN out to an average radius of ∼ 1130 pc. These
    findings question the effectiveness of AGN being capable of clearing material from their host bulge in
    the nearby universe and suggest that disruption of gas by AGN activity may prevent star formation
    without requiring evacuation. Additionally, we find a dichotomy in our targets when comparing [O III]
    radial extent and nuclear FWHM, where QSO2s with compact [O III] morphologies typically possess
    broader nuclear emission-lines.



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    Image mosaic created from above paper: Continuum-subtracted [O III] 5007 images of each target. Inset images display r-band SDSS images.

    SDSS image cutouts in same order

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