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News Release Archive: Galaxy > Quasar/Active Nucleus ... 10/25/2007 STScI-2007-39 5. Hubble Spies Shells of Sparkling Stars Around Quasar What has appeared as a mild-mannered elliptical galaxy in previous studies is revealing its wild side in new images taken with NASA's Hubble Space Telescope.
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hubblesite.org/newscenter/archive/releases/galaxy/quasa...
hubblesite.org/newscenter/archive/releases/galaxy/quasar_active-nucleus/
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Dec 1, 2009 ... Within a few million years, both quasar and galaxy will have merged. That may explain why some quasars are surrounded by galaxies: the ...
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sciencenow.sciencemag.org/cgi/content/full/2009/1201/2
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October 22, 1995 ; A Quasar - Galaxy Collision?; Credit: NASA, HST, John Bahcall, Institute for Advanced Study. ... This Hubble Space Telescope image shows a quasar known as PKS 2349 (the star-like object near the center) and a galaxy (surrounding fuzzy patch), but the quasar is not at the galaxy's center! In fact,
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apod.nasa.gov/apod/ap951022.html
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Active galaxies are galaxies which have a small core of emission embedded in an otherwise typical galaxy. This core may ... In addition, gamma-ray observations alone can provide valuable information on the nature of particle acceleration in the quasar jet, and clues as to how the particles interact with their surroundings.
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imagine.gsfc.nasa.gov/docs/science/know_l1/active_galax...
imagine.gsfc.nasa.gov/docs/science/know_l1/active_galaxies.html
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The cool name "quasar" comes from the phrase "quasi-stellar radio source." Quasars are very bright centers of young galaxies that are incredibly far away. The light they generate takes billions of years to reach us, so that looking at a quasar is like viewing the birth of a galaxy long, long ago.
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ask.yahoo.com/ask/20000420.html
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Explanation: Is the galaxy in the center connected to the quasar on the upper right? Disagreements about systems like this have raged for decades and have been used to challenge the foundations of modern cosmology. ... The Galaxy and the Quasar ; Credit: R. Knacke (Penn State Erie) et al., Hubble Heritage Team, NASA...
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antwrp.gsfc.nasa.gov/apod/ap021007.html
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QUASAR-GALAXY CORRELATIONS: A DETECTION OF MAGNIFICATION BIAS1 ... Earlier studies have looked for quasar-galaxy correlations either in homogeneous samples on small scales of several arcseconds (Tyson 1986), or in inhomogeneous samples on scales of several arcminutes (see, e.g., Bartsch et al.
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www.iop.org/EJ/article/1538-3881/121/5/2392/200564.text...
www.iop.org/EJ/article/1538-3881/121/5/2392/200564.text.html
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QUASAR-GALAXY CORRELATIONS: A SEARCH FOR AMPLIFICATION BIAS1 ... Analytical models of the matter distribution have been used to predict the amplitude and scale of these quasar-galaxy correlations. The most recent models incorporate nonlinear evolution of the matter distribution (Dolag & Bartelmann 1997;
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www.iop.org/EJ/article/1538-3881/118/2/613/990126.html
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Illustration shows a comparison between normal galaxy, active galaxy and quasar. ... Chandra Images: Quasars & Active Galaxies; Printable Field Guide: Quasars & Active Galaxies; Questions & Answers: Galaxies, Galaxy Clusters, AGN, and Quasars; More: Quasar 3C273...
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chandra.harvard.edu/xray_sources/quasars.html
chandra.harvard.edu/xray_sources/quasars.html
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