Much effort has been done in order to better understand the active galactic nuclei mechanisms behind the relativistic jets observed in radio-loud sources. These phenomena are commonly seen in luminous objects with intermediate/high redshift such as quasars, so that the analysis of the spectroscopic properties of these sources may be a way to clarify this issue. Measurements are presented and contextualized taking advantage of the set of correlations associated with the quasar Main Sequence (MS), a parameter space that allows to connect observed properties to the relative relevance of radiative and gravitational forces. In the redshift range we consider, the low-ionization HI Balmer line Hβ is shifted into the near infrared. Here we present first results of a sample of 22 high-luminosity quasars with redshift between 1.4 and 3.8. Observations covering the Hβ spectral region were collected with the IR spectrometer ISAAC at ESO-VLT. Additional data were collected from SDSS in order to cover the UV region of our sources. The comparison between the strong C IV λ1549 high-ionization line and Hβ in terms of line widths and shifts with respect to the rest-frame leads to an evaluation of the role of radiative forces in driving an accretion disk wind. While for non-jetted quasars the wind properties have been extensively characterized as a function of luminosity and other physical parameters, the situation is by far less clear for jetted sources. The overarching issue is the effect of the relativistic jets on the wind, and on the structure of the emitting region in general. We present results from our analysis of the optical and UV line profiles aimed to identifying the wind contribution to the line emission.Resumo. Muito esforço vem sendo realizado para entender os mecanismos que envolvem os núcleos ativos de galáxias que estão por trás dos jatos relativisticos observados em objetos radio-loud. Esses fenômenos são normalmente detectados em galáxias luminosas de intermediário/alto redshift como os quasares, por exemplo. Uma maneira de clarificar esse comportamento é através da análise das propriedades espectroscópicas desses objetos. As medidas aqui apresentadas são contextualizadas com as correlações associadas à Main Sequence (MS) de quasares, um espaço de parâmetros que nos permite conectar propriedades observacionais com a relativa relevância das forças radiativas e gravitacionais. No intervalo de redshift que consideramos, a linha de Balmer de baixa ionização Hβ apresenta um shift para o infravermelho próximo. Neste trabalho, apresentamos os resultados iniciais de uma amostra de 22 quasares de alta luminosidade com redshift entre 1.4 e 3.8. As observações que compreendem o intervalo ótico foram coletadas a partir do espectrógrafo em infravermelho ISAAC do ESO-VLT. Dados adicionais para cubrir o intervalo em UV da amostra foram obtidos através do SDSS. A comparação entre a linha de alta ionização C IV λ1549 e Hβ em termos de largura e shifts das linhas com respeito ao rest-frame leva a uma avaliação do papel das forças...
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