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An H2Co 6 cm maser pinpointing a possible circumstellar torus in IRAS 18566+0408
(UNIV CHICAGO PRESS, 2007-11-10)
We report observations of 6 cm, 3.6 cm, 1.3 cm, and 7 mm radio continuum, conducted with the Very Large Array, toward IRAS 18566+0408, one of the few sources known to harbor H(2)CO6 cm maser emission. Our observations ...
Structure and chemistry of the xylem of arborescent species of Blechnum from South America
(Brill Academic Publishers, 2015-01)
This contribution provides a detailed study of the xylem in three arborescent species of Blechnum section Lomariocycas using SEM, TEM, FT-IR spectroscopy and sugar composition analysis. The overall structure of root and ...
Demystifying the powering mechanism of low-luminosity active galactic nuclei
(Universidad de Valparaíso, 2022-08)
Despite the long history of studies of active galactic nuclei (AGN), details on the structure of the accretion mechanism are far from clear. The work presented in this thesis is directed at unveiling properties of the ...
Infrared polarimetry of Mrk 231: scattering off hot dust grains in the central core
(OXFORD UNIV PRESS, 2017)
We present high-angular (0.17-0.35 arcsec) resolution imaging polarimetric observations of Mrk 231 in the 3.1 mu m filter using MMT-Pol on the 6.5-m MMT, and in the 8.7, 10.3, and 11.6 mu m filters using CanariCam on the ...
Hubble Space Telescope and Spitzer point-source detection and optical extinction in powerful narrow-line radio galaxies
(Oxford University PressOxford, 2014)
We present an analysis of infrared Hubble Space Telescope (HST) and Spitzer data for a
sample of 13 Fanaroff–Riley II (FRII) radio galaxies at 0.03 < z < 0.11 that are classified
as narrow-line radio galaxies (NLRGs). ...
Dissecting the active galactic nucleus in Circinus - I. Peculiar mid-IR morphology explained by a dusty hollow cone
(Oxford university press, 2017)
Recent high angular resolution observations resolved for the first time the mid-infrared (MIR) structure of nearby active galactic nuclei (AGN). Surprisingly, they revealed that a major fraction of their MIR emission comes ...
The architecture of the active galactic nucleus of NGC 1068
(International Astronomical UnionFlorianópolis, 2013)
NGC 1068 is the brightest and most studied AGN
in the sky. Its study motivated the development of
the Unified Model for AGN as the prototype of an
obscured Seyfert 1 galaxy. The opportunity of studying
such object, ...
Probing the circumnuclear absorbing medium of the buried AGN in NGC 1068 through NuSTAR observations
(OUP, 2019)
We present the results of the latest NuSTAR monitoring campaign of the Compton-thick Seyfert 2 galaxy NGC 1068, composed of four ∼50 ks observations performed between 2017 July and 2018 February to search for flux and ...
Environment of 1 ≤ z ≤ 2 MIR selected obscured and unobscured AGNs in the Extended Chandra Deep Field South
(EDP Sciences, 2017-09)
Context. In unified models, different types of active galaxy nuclei (AGN) correspond to a single class of objects, where their observed differences are solely due to the different orientations of the obscuring material ...