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Effects of mergers on non-parametric morphologies
(Cambridge University Press, 2017-06)
We study the effects of mergers on non-parametric morphologies of galaxies. We compute the Gini index, M20, asymmetry and concentration statistics for z = 0 galaxies in the Illustris simulation and compare non-parametric ...
Ultra-high-energy cosmic rays from centaurus A: jet interaction with gaseous shells
(IOP PUBLISHING LTD, 2010)
Ultra-high-energy cosmic rays (UHECRs), with energies above similar to 6 x 10(19) eV, seem to show a weak correlation with the distribution of matter relatively near to us in the universe. It has earlier been proposed that ...
Mild evolution of the stellar metallicity gradients of disc galaxies
(EDP Sciences, 2017-08)
Context. The metallicity gradients of the stellar populations in disc galaxies and their evolution store relevant information on the disc formation history and on those processes which could mix stars a posteriori, such ...
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 ...
New H i observations of KK 69. Is KK 69 a dwarf galaxy in transition?
(Springer, 2020-07)
We present new HI data of the dwarf galaxy KK 69, obtained with the Giant Metrewave Radio Telescope (GMRT) with a signal-to-noise ratio almost double previous observations. We carried out a Gaussian spectral decomposition ...
Nuclear and extended spectra of NGC 1068-II. Near-infrared stellar population synthesis
(WILEY-BLACKWELL, 2010)
We performed stellar population synthesis on the nuclear and extended regions of NGC 1068 by means of near-infrared spectroscopy to disentangle their spectral energy distribution components. This is the first time that ...
The principle of maximum entropy explains the cores observed in the mass distribution of dwarf galaxies
(EDP Sciences, 2020-10)
Cold dark matter (CDM) simulations predict a central cusp in the mass distribution of galaxies. This prediction is in stark contrast with observations of dwarf galaxies that show a central plateau or "core"in their density ...
Active galactic nuclei at high redshifts: Properties and environment of Type 1 and 2 AGNs
(Wiley Blackwell Publishing, Inc, 2018-09)
We explore host galaxy properties and environment of a sample of Type 1 and 2 active galactic nuclei (AGN) taken from the COSMOS2015 catalogue (Laigle et al.), within 0.3 ≤ z ≤ 1.1 selected for their emission in X-rays, ...