Diseño de una metodología para medir la brecha digital a partir del plan nacional de tecnologías de la información y las comunicaciones (TIC)

El Gobierno Nacional considera estratégicas las Tecnologías de Información y Comunicación para fomentar la competitividad y la igualdad de oportunidades en Colombia. Por esta razón se ha fijado como objetivo que a 2019 todos los colombianos deben estar conectados e informados, haciendo uso eficiente de las TIC con la finalidad de mejorar la inclusión social y la competitividad. Para obtener datos oficiales que permitan conocer el estado actual, cobertura, utilización y zonas vulnerables en TIC, en los sectores; económico, empresarial, social, geográfico, educativo y salud, se diseñó una metodología que permite medir la brecha digital tomando como referencia los ejes definidos por el Gobierno Nacional en el Plan Nacional de Tecnologías de la Información y las Comunicaciones. A partir de esta metodología es posible medir la brecha digital y aprovechar los resultados en el diseño y aplicación de estrategias que permitan la ampliación de cobertura y capacitación en TIC en las poblaciones donde se aplique

Supermassive Black Hole Mass Regulated by Host Galaxy Morphology

We investigated the relationship between supermassive black hole (SMBH) mass and host starburst luminosity in Seyfert galaxies and Palomar-Green QSOs, focusing on the host galaxy morphology. Host starburst luminosity was derived from the 11.3 micron polycyclic aromatic hydrocarbon luminosity. We found that the SMBH masses of elliptical-dominated host galaxies are more massive than those of disk-dominated host galaxies statistically. We also found that the SMBH masses of disk-dominated host galaxies seem to be suppressed even under increasing starburst luminosity. These findings imply that final SMBH mass is strongly regulated by host galaxy morphology. This can be understood by considering the radiation drag model as the SMBH growth mechanism, taking into account the radiation efficiency of the host galaxy.Comment: 6 pages, 1 figure; accepted for publication in MNRA

Near-infrared imaging and spectroscopy of the nuclear region of the disturbed Virgo cluster spiral NGC 4438

We present near-infrared VLT ISAAC imaging and spectroscopy of the peculiar Virgo galaxy NGC 4438, whose nucleus has been classified as a LINER. The data are supplemented by mid-infrared imaging, and compared to previous WFPC2 HST broadband images. Images and position-velocity maps of the [Fe II] and H2 line emissions are presented and compared with the distribution of the optical narrow-line region and radio features. Our results show that shocks (possibly driven by a radio jet) contribute to an important fraction of the excitation of [Fe II], while X-ray heating from a central AGN may be responsible for the H2 excitation. We address the question whether the outflow has an AGN or a starburst origin by providing new estimates of the central star formation rate and the kinetic energy associated with the gas. By fitting a Sersic bulge, an exponential disc and a compact nuclear source to the light distribution, we decomposed NGC 4438's light distribution and found an unresolved nuclear source at 0.8 arcsec resolution with M_K = -18.7 and J-H = 0.69. Our measured bulge velocity dispersion, 142 km/s, together with the standard M_bh-sigma relation, suggests a central black hole mass of log(M_bh/Msun) ~ 7.0. The stellar kinematics measured from the near-infrared CO lines shows a strong peak in the velocity dispersion of 178 km/s in the central 0.5 arcsec, which is possible kinematic evidence of a central black hole. We calculated a general expression for the integrated Sersic profile flux density in elliptical geometry, including the case of 'disky' isophotes.Comment: 13 pages, 12 figures. Affiliation added. Higher resolution image