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dc.contributor.authorStorchi-Bergmann, Thaisapt_BR
dc.contributor.authorOliveira, Bruno Dall'Agnol dept_BR
dc.contributor.authorMicchi, L. F. Longopt_BR
dc.contributor.authorSchmitt, Henrique Robertopt_BR
dc.contributor.authorFischer, Travis C.pt_BR
dc.contributor.authorKraemer, S. B.pt_BR
dc.contributor.authorCrenshaw, Daniel Michaelpt_BR
dc.contributor.authorMaksym, W. Peterpt_BR
dc.contributor.authorElvis, Martinpt_BR
dc.contributor.authorFabbiano, Giuseppinapt_BR
dc.contributor.authorColina, Luispt_BR
dc.date.accessioned2019-01-18T02:31:25Zpt_BR
dc.date.issued2018pt_BR
dc.identifier.issn0004-637Xpt_BR
dc.identifier.urihttp://hdl.handle.net/10183/187866pt_BR
dc.description.abstractWe have used narrowband [O III] λλ4959, 5007 and Hα+[N II] λλ6548, 84 Hubble Space Telescope (HST) images of nine luminous (L[O III]>1042 erg s−1) type 2 QSOs with redshifts 0.1<z<0.5 in order to constrain the geometry of their extended narrow-line regions (ENLRs), as recent ground-based studies suggest that these regions become more spherical at high luminosities due to destruction of the torus. We instead find elongated ENLRs reaching 4–19 kpc from the nucleus and bipolar ionization cones in [O III]/(Hα+[N II]) excitation maps indicating that the torus survives these luminosities, allowing the escape of ≈10 times higher ionizing photon rates along the ionization axis than perpendicular to it. The exceptional HST angular resolution was key to our success in arriving at these conclusions. Combining our measurements with previous ones based on similar HST data, we have revisited the relation between the ENLR radius Rmaj and L[O III] over the range 39<log(L[O III])<43.5 (L in erg s−1): log(Rmaj)=(0.51±0.03) log(L[O III]) −18.12±0.98. The radius of the ENLR keeps increasing with L[O III] in our data, implying that the ENLR can extend to distances beyond the limit of the galaxy if gas is present there—e.g., from active galactic nucleus (AGN) outflows or interactions, seen in six objects of our sample. We attribute the flattening previously seen in this relation to the fact that the ENLR is matter-bounded, meaning that ionizing photons usually escape to the intergalactic medium in luminous AGNs. Estimated ionized gas masses of the ENLRs range from 0.3 to 2×108Me, and estimated powers for associated outflows range from <0.1% to a few percent of the QSO luminosity.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofThe astrophysical journal. Bristol. Vol. 868, no. 1 (Nov. 2018), 14, 22 p.pt_BR
dc.rightsOpen Accessen
dc.subjectGaláxias ativaspt_BR
dc.subjectGalaxies: activeen
dc.subjectBuracos negrospt_BR
dc.subjectGalaxies: jetsen
dc.subjectNucleo galaticopt_BR
dc.subjectGalaxies: seyferten
dc.subjectISM: jets and outflowsen
dc.subjectGas ionizadopt_BR
dc.subjectQuasars: emission linesen
dc.subjectQuasars: supermassive black holesen
dc.titleBipolar ionization cones in the extended narrow-line region of nearby QSO2spt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb001083078pt_BR
dc.type.originEstrangeiropt_BR


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