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Astronomy 123 Test 2 November 18, 2011 Name

hendrix2.uoregon.edu/~imamura/123cs/exams/astr123_x2_fall2011.pdf

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 ...

Swift and Hubble Probe Asteroid Collision Debris | NASA

www.nasa.gov/topics/universe/features/asteroid-collision.html

Apr 28, 2011 ... Asteroids are rocky fragments thought to be debris from the .... “The newly discovered supersized black hole resides in the center of a massive elliptical galaxy, NGC 1600, located ... But for galaxy NGC 1600, the giant black hole's mass far ..... The astronomers using Hubble had expected to see twin lobes of ....

Spacetime Warpers: Prime Suspects - NCSA Web Archive

archive.ncsa.illinois.edu/Cyberia/NumRel/RelUniverse2.html

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.

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

arxiv.org/pdf/astro-ph/0411247

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.

Active Galactic Nuclei and Quasars: Why Still a Puzzle after 50 years?

arxiv.org/pdf/1501.02001

the sun, and ∼ 1000 times the luminosity of our entire Milky Way galaxy, which contains ... The second inference is that the energy content of the radio lobes is ... permassive black holes (or other tiny objects) reside at the centers of most normal galaxies ... The Type 2 sources were thought to lack these essential.

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

cds.cern.ch/record/646784/files/0310106.pdf

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.

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

www.aanda.org/articles/aa/full/2004/02/aa3478/aa3478.right.html

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...

"Active Galaxy Nuclei".

www.astro.bas.bg/~petrov/galaxies_files/agn.html

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...

HOW DOES RADIO AGN FEEDBACK FEED BACK?

www2011.mpe.mpg.de/ir/irretreat2011/read/2010_deyoung.pdf

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 ...

A Fundamental Plane of black hole activity

mnras.oxfordjournals.org/content/345/4/1057.full

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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An Infrared View of the Galaxy | NASA

www.nasa.gov

Feb 2, 2010 ... Third Rock Radio ... The Galactic core is obscured in visible light by intervening dust clouds, but ... and reradiates this energy as heat at longer mid-infrared wavelengths. ... the infrared and optical brightness of each candidate source. .... Our own Milky Way resides in a small galaxy group, called the Local ...

Seyfert Galaxies Encyclopedia of Astronomy & Astrophysics

www.astro.caltech.edu

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.

Cosmic Evolution - Galactic

www.cfa.harvard.edu

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.