Active galaxies: Assembling the cloudy jigsaw

AGN Zoo and Classications of Active Galaxies

We review the variety of Active Galactic Nuclei (AGN) classes (so-calledAGN zoo") and classification schemes of galaxies by activity types based on their optical emission-line spectrum, as well as other parameters and other than optical wave-length ranges. A historical overview of discoveries of various types of active galaxies is given, including Seyfert galaxies, radio galaxies, QSOs, BL Lace...

Evidence for public health policy on inequalities: 2: assembling the evidence jigsaw.

STUDY OBJECTIVE To garner research leaders' perceptions and experiences of the types of evidence that influence policy on health inequalities, and their reflections on how the flow of such research evidence could be increased. DESIGN, SETTING, AND PARTICIPANTS Qualitative two day residential workshop with senior research leaders, most of whom were currently involved in evaluations of the heal...

Estimation of photosynthetically active radiation under cloudy conditions

Clouds are the largest modulators of the solar radiative flux reaching the Earth’s surface. The amount and type of cloud cover prevailing at a given time and location largely determines the amount and type of solar radiation received at the Earth’s surface. This cloud radiative forcing is different for the different solar spectral bands. In this work, we analysed the influence of cloud radiativ...

Active Galaxies: Overview

The Surroundings of Disturbed , Active Galaxies

The brightest apparent magnitude examples of ultra luminous infrared galaxies (ULIRG's) are studied here in X-ray, optical, infrared and radio wavelengths. It is is found that they have associated material reaching out to apparent diameters of the order of a degree on the sky. Gas, dust, X-ray material and quasars appear to be ejected from the active nuclei with all objects nearer than their re...