... The Cloudy Cores of Active Galaxies . ... Credit Copyright: NASA's GSFC , W. Steffen ( UNAM ) Explanation: What would it look like to travel to the center of an active galaxy? Most galactic centers are thought to house black hole s millions of times more massive than our Sun. ... Publications with keywords: Galactic Center . Publications with words: Galactic Center . ... A Laser Strike at the Galactic Center . ... The Diner at the Center of the Galaxy . Kona Galaxy Garden . ...

... August 22, 1999 . The Center of Centaurus A . ... NASA . ... Infrared images from the Hubble have also shown that hidden at the center of this activity are what seem to be disks of matter spiraling into a black hole with a billion times the mass of the Sun ! ... Astronomers believe that such black hole "central engines" generate the radio, X-ray, and gamma-ray energy radiated by Centaurus A and other active galaxies . ... About APOD > . ... NASA Technical Rep.: ...

... Our Sun is part of a huge wheel-shaped collection of stars. ... Astronomers have long suspected it was a very massive black hole, and that every galaxy had such a central mass, created early in the history of the universe. ... However, unless that object happens to be headed directly at the black hole (a relatively small target) it will just swing around and fly away again, like a comet making a pass at the Sun. The velocity acquired in falling towards the black hole also helps it escape. ...

Black holes . ... Black holes are objects for which the gravitational attraction is so strong that nothing, not even light, can escape from it. ... The material inside a black hole is concentrated into a singularity: a single point of infinitely high density where space and time are infinitely distorted. ... The existence of such black holes has been inferred in cases where the black hole pulls gas of a companion star that orbits around it. ... Gravity's Fatal Atraction: Black Holes in The Universe. ...

... February 21, 1996 . Millions of Stars in Omega Centauri . ... Explanation: Pictured above is the largest ball of stars in our Galaxy. About 10 million stars orbit the center of this globular cluster - named Omega Centauri - as this giant globular cluster orbits the center of our Galaxy . Recent evidence indicates that Omega Centauri is by far the most massive of the about 160 globular clusters in the Milky Way . ... About APOD | ...

... A radio galaxy is a galaxy that emits an unusually big amount of energy at radio wavelengths. ... Inside of each galaxy with an active nucleus (radio galaxies are among them) there must be a system of a "central machine" responsible for the colossal amount of the emitted energy from radio to gamma ranges. ... Sometimes a radio source in an active galaxy may flare again if the needed conditions appear (a new portion of matter would fall into the furnace of the "central machine"). ...

home resources > books . SEARCH ASP SITE: Match ALL words Match ANY word . ... Buy The Black Hole at the Center of our Galaxy at Amazon.com! Reviewed by Terrell Kent Holmes . In 1974 astronomers discovered a bright radio source at the center of the Milky Way Galaxy, in the direction of the constellation Sagittarius. It was an unknown quantity then, but astronomers now know that the object is a supermassive black hole causing a maelstrom of activity at the galactic center. ...

... Active Disk Building in a Local HI-massive LIRG . by Michelle Cluver (UCT) . ... However, the mid-infrared uncovers a star-forming disk housing an intense starburst with a star formation rate of approximately 21 Msun/yr (Cluver et al. 2008 , 2010 ).This luminous infrared galaxy (LIRG) appears to be undergoing asymmetric inside-out disk building, with a star formation efficiency comparable to local disk galaxies and quite different to merger-driven starbursts. ... today * ATNF | ...

Starbust galaxies represent those galaxies which are currently experiencing a phase of active star formation which is substantially higher than the time average star formation rate. ... A technical discussion of galactic winds and baryonic blowout in the case of low mass galaxies can be found here To investigate this possibility we have selected two extreme starburst galaxies with astounding levels of H-alpha emission. ... The first Fabry-Perot (FP) image shows just the very center of the galaxy. ...

... 739C As one part of a program to detect complete samples of active extragalactic objects, the 3.36x10^-3 sr field centered on alpha=12h04min, delta=+11deg30' (1950.0) was mapped with the Very Large Array at 1411MHz. Sixty-seven maps cover this field so that no point is more than 15arcmin from the nearest map center. ... The rms map noise is 0.030 + 0.001 mJy, and the resulting source list is complete to a map peak flux density S_p = 0.2 mJy within 25 arcmin of the field center. ...

... Bad Astronomy . ... Bitesize Astronomy . ... Last week's Snack talked about how black holes can affect the environment around them in such a way as to be very bright . ... It's a common misconception that black holes always have matter swirling into them. ... As this matter gets closer and closer to the black hole it piles up and a large, fairly flat disk forms. This is called the accretion disk , because matter from this disk accretes (that is, falls in) on the black hole. ... 2008 Phil Plait. ...

... Behemoth black hole found in an unlikely place . Gravitational wave search provides insights into galaxy evolution and mergers . ... galaxies . ... black holes . ... RXTE reveals the cloudy cores of active galaxies . ... The cloudy heart of an active galaxy. ... Now imagine many such clouds orbiting in a vast ring at the heart of a distant galaxy, occasionally dimming the X-ray light produced by the galaxy s monster black hole. ... Zoom into the cloudy heart of an active galaxy. ...

... Research . ... A rare hybrid morphology radio galaxy . ... In this project we will be able to investigate the environmental effect on star formation and galaxy evolution in individual galaxies falling into the cluster through radio observations of active galactic nuclei (AGN). Current models of galaxy evolution regulate the star formation rates within the simulated galaxies by invoking radio-mode feedback from AGN. ... Julie.Banfield@anu.edu.au . ...

... Astronomy news . ... NASA's Spitzer Images Out-of-This-World Galaxy . ... It is spiral-shaped like our Milky Way, with long, spindly arms of stars. The "eye" at the center of the galaxy is actually a monstrous black hole surrounded by a ring of stars. In this color-coded infrared view from Spitzer, the area around the invisible black hole is blue and the ring of stars, white. ... The ring around the black hole is bursting with new star formation. ...

... Proposal Type: General Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT: Regular Astronomy Extragalactic 30 Hours 2 hours The HI Properties of Dwarf Galaxies Hosting Massive Black Holes While black hole (BHs) inhabit the centers of essentially all massive bulge-dominated galaxies, the prevalence of BHs in dwarf galaxies is still unknown. ... We propose to explore the role of AGN feedback on the HI content of low mass galaxies. ...

Martin Elvis, with sketch of quasar structure (copyright: Smithsonian Institution. from SI Research Reports .) ... Martin Elvis has supervised numerous students from many institutions. Students interested in working with Dr. Elvis should consult the CfA Predoc page , or send him an email (address below) . ... A model which combines all the main spectral features of AGN/quasars into a single structure. ... Elvis M. 2000, Astrophysical Journal, 545, 63 (Dec 10) (astro-ph/0008064)) . ... Elvis 1999. ...

... We are exploring the evolution of massive binary star populations for a nuclear starburst occuring in the conditions similar to the Milky Way galaxy, in its central part, on a time scale of 10 Myr. ... Our results include the number of X-ray transients (NS + main sequence star), super-accreting black holes (BHs), and binaries consisting of a BH + supergiant, all as functions of time. ... Spatial distribution of X-ray binaries at the Galactic center after the starburst . ...

... Over the first 4 years, its X-ray telescopes eROSITA and ART-XC will survey the whole sky with a record sensitivity in the 0.5-10 keV energy band. ... The goal of the second international Spectrum-RG conference is to discuss the different scientific topics addressed by the mission, synergies with surveys at other wavelengths, and requirements to follow-up observations.Contributed talks and poster presentations are invited on the topics related to the SRG science goals. ... Active galactic nuclei . ...

Astronotes Armagh Planetarium's Stellar Blog! ... Solar System . ... Planets . ... This bizarrely shrunken planetary system was found by NASAтАЩs Kepler mission, hence the parent star has been named Kepler-11. ... Planetary scientist and Kepler science team member Jack Lissauer said ?These six planets are mixtures of rock and gases, possibly including water.тАЭ €аNone of these strange new worlds are likely to be home to any form of life; their surface conditions are simply too extreme. ...