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Astronomy 123 Test 2 November 18, 2011 Name


Nov 18, 2011 ... 6) In a lobe radio galaxy, the ultimate energy source for the entire galaxy is thought to reside: A) in the galaxy's active nucleus. B) in the spiral ...

NASA's Chandra Observatory Finds Cosmic Showers Halt Galaxy ...


Mar 4, 2015 ... NASA's Chandra Observatory Finds Cosmic Showers Halt Galaxy Growth ... They found that the precipitation feedback loop driven by energy produced ... represent pathways to understanding how our entire universe evolved in the ... All of the lensed radio sources are galaxies located between 7.8 and 10.4 ...

"Active Galaxy Nuclei".


As such, the nucleus can also be thought of as the "bottom" of the galaxy: gas ... A small minority (5-10%) of these sources are the strong radio sources that ... requiring the presence of a source of photons of much greater energies than can ..... of the galaxy: Narrow radio-emitting channels or jets link the distant radio l...

The 'ultimate' cluster radio relic spectrum: observations from ... - ESO


Radio relics are thin patches of diffuse synchrotron radio emission thought to form when ... skirts of massive, post-core passage merging galaxy clusters ( Feretti et al. ... shocks with M < 5 can be produced when a small percentage of the energy ..... We fit the flux for the entire source, as well as split the source in two regions.

Seyfert Galaxies Encyclopedia of Astronomy & Astrophysics


Mar 2, 2006 ... finding Seyfert galaxies amongst the more normal galaxy population. ... hole provides the ultimate energy source, as gas falls inwards via ... directions to light up gas and dust residing much further out in the .... The entire NLR and associated radio .... Seyferts using a property that is not thought to depend on.

Aborted jets and the X–ray emission of radio–quiet AGNs


ultimate source of energy of the emission of both the disk and the corona is accretion. Here we ... spectra in radio–quiet AGNs and galactic black hole sources. ... ing source is very close to the black hole and resides on the ..... Fink 1993), thought to be produced by the accretion disk, for ...... radio lobes in not jetted sources.

Supermassive Black Holes in Galactic Nuclei: Past, Present and ...


Nov 9, 2004 ... The menagerie of Active Galactic Nuclei (AGNs) is as eclectic as could ... sion that the source of the nuclear activity is accretion onto a central, ... matter is thought to be confined in an accretion disk, or more gener- ..... port energy from the nucleus to the radio lobes at distance of ∼220 .... The ultimate test.



Jan 21, 2010 ... The possible role of radio active galactic nucleus (AGN) “feedback” in ... on much larger scales than previously thought, thus possibly satisfying ... total energies present in some radio sources tend to lie factors ..... the entire volume of the outflow. ... is that the ultimate fate of fully developed turbulent flows ...

Aborted jets and the X–ray emission of radio–quiet AGNs


In the latter case the ultimate source of energy of the emission of both the ... to the X-ray spectra in radio-quiet AGNs and galactic black hole sources. ... 2002), provided that the illuminating source is very close to the black hole and resides on the ... on the rotation axis of the black hole, thought to be the site of the jet abor...

A Fundamental Plane of black hole activity


Nov 11, 2003 ... We compile a sample of ∼100 active galactic nuclei with measured .... lobe radio power and 2–10 keV luminosity in a sample of radio-loud ... based on the broad- band spectral energy distributions of some GBH ..... Shown are the results for: the entire data set (upper panel), the flat spectrum sources (lower ...

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Spacetime Warpers: Prime Suspects - NCSA


Nov 8, 1995 ... Some reside in our own galaxy -- The Milky Way. ... The Ultimate Singularity ... It surrounds a neutron star whose radio emissions pulsate 30 times per second. ... part of their rotational energy gets converted into gravitational radiation. ... Here's an optical image of the powerful X-ray source Cygnus X-1.

Measuring a White Dwarf Star | NASA


For astronomers, it's always been a source of frustration that the nearest ... the star's ultraviolet and visible light, but it absorbs and reradiates this energy as heat ... Composite of images from Hubble shows a galaxy ablaze with newly formed stars ...... For stars, mass is destiny, and what will determine their ultimate fat...

Cosmic Evolution - Galactic


Observations during the 1990s imply that black holes reside in the hearts of ... How can an entire star (or larger) shrink to the size of an atom (or smaller), ... FIGURE 2.6 – Earth being squeezed by a gigantic vise—just a thought! ..... And in the center of the ring is an intense radio source—the dynamical nucleus of our Galaxy.