... Spinning Black Holes and MCG 6 30 15 . ... 29.10.2001 . ... Credit: XMM-Newton , ESA , NASA Explanation: What makes the core of galaxy MCG-6-30-15 so bright? Some astronomers believe the answer is a massive spinning black hole . ... A spinning black hole could explain both effects. ... October 2001 . ... 2001 2002 . ... Publications with keywords: black hole - rotation . Publications with words: black hole - rotation . ... Jumbled Galaxy Centaurus A . ... Black Holes in Galactic Centers . ...

... 2001 October 29 . Spinning Black Holes and MCG-6-30-15 . Drawing Credit: XMM-Newton , ESA , NASA . ... Some astronomers believe the answer is a massive spinning black hole . If so, this would be the first observational indication that it is possible to make a black hole act like a battery -- and tap into its rotational energy. ... A spinning black hole could explain both effects. ... Pictured above is an artist's illustration of a black hole surrounded by an accretion disk . ...

... We have measured this "redshift" for the pink black holes, and allowed for it in our calculations. ... We see this effect in the emission from gas around these pink black holes, but it is far too small an effect to account for the pinkness. Thus the swirling motions of gas around or into the black holes cannot produc the colour. ... At first we thought that these things were normal blue black holes hidden behind clouds of interstellar dust, that absorbed the blue light and made them appear pink. ...

... 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. ...

... Another option is to buy slides of astronomical objects at different wavelengths to show students why astronomers use different bands of the spectrum to bring out specific characteristics in celestial objects. ... He then uses the camera to scan the entire classroom, asking students to identify what they are seeing. ... Once students see light in action, they can investigate its properties - such as frequency, wavelength, and interference - with wave experiments. ...

... NASA's Hubble Space Telescope has provided a never-before-seen view of a warped disk flooded with a torrent of ultraviolet light from hot gas trapped around a suspected massive black hole. ... This composite image of the core of the galaxy was constructed by combining a visible light image taken with Hubble's Wide Field Planetary Camera 2 (WFPC2), with a separate image taken in ultraviolet light with the Faint Object Camera (FOC). ... The inset box shows Hubble Space Telescope's field of view. ...

... The event horizon is the boundary of a black hole) . ... When the supermassive star implodes (collapses under it?s own gravity) a black hole is formed. Many black holes have been found in the centres of galaxies. ... It was thought that black holes don?t give out any energy at all (except when engulfing stars). ... It is thought that as the stars pass near to the centre, they are pulled in by the black hole and forced to remain orbiting around the black hole. ...

... HUBBLE UNCOVERS DUST DISK AROUND A MASSIVE BLACK HOLE . Resembling a gigantic hubcap in space, a 3,700 light-year-diameter dust disk encircles a 300 million solar-mass black hole in the center of the elliptical galaxy NGC 7052. ... Because the jets in NGC 7052 are not perpendicular to the disk, it may indicate that the black hole and the dust disk in NGC 7052 do not have a common origin. ... NGC 7052 is located in the constellation of Vulpecula, 191 million light-years from Earth. ...

Blackholes Forum Message . Forums: . ... Black Holes And RedShift . ... Perhaps black holes really are the reproductive means of the universe.Could the black hole of a Quasar red-shift the electromagnetic energy trying to escape it? ... Perhaps black holes treat electromagnetic energy the same way. ... No one really knows enough about Quasars and black holes to say for sure but ask yourself this: Why would all the Quasars in the universe be moving away from the Milky Way? ... www.astronomy.net . ...

... 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. ...

... X-rays are made up of photons that are emitted from stars, or quasars, or supernovae, the sun, or simply: anything that is undergoing a change either in size or temperature or giving out heat. ... in an X-ray binary star system, in which one normal star's orbit is crossed by a neutron star, when the neutron star by means of gravitational pull takes matter from the normal star X-rays form. ... Artists conception of a normal star (HDE 226868) and a black hole taking matter from the normal star. ...

... Using the amazing power of the ALMA telescope, astronomers have unlocked some of the mysteries surrounding supermassive black holes that lie at the centre of galaxies. ... Well, supermassive black holes are the largest type of black hole . ... Astronomers are almost certain that we have a supermassive black hole at the centre of our own galaxy, the Milky Way. In fact, it is now widely accepted that there is a supermassive black hole at the centre of most galaxies. ...

... SS433 is a close binary system, one star is a supergiant, a second one is a black hole. ... Even a black hole cannot accept such an enormous mass flux, a supercritical accretion disk appears, all the excess gas glows up to several tens of thousands degrees and is ejected off the disk with enormous velocities. ... SAO researchers have found an evidence of the supercritical accretion onto a black hole in SS433, which follows from a brightness variability of the SS433 disk. ...

... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Merging Black Holes in Galaxies: Galaxy Evolution, AGN and Gravitational Waves . ... The first meeting in an annual series of international astrophysics conferences, co-organized by the Anglo-Australian Observatory and the Australia Telescope National Facility, is now scheduled for 15 to 20 June with the title, "Merging Black Holes in Galaxies: Galaxy Evolution, AGN and Gravitational Waves". ...

... Special Reports Giant space cloud may be powered by black holes 17:57 23 April 2007 NewScientist.com news service David Shiga An enormous cloud of roiling plasma in space may be drawing its energy from black holes, new observations suggest. Such clouds might be sources for the mysterious particles that occasionally crash into Earth's atmosphere at ultra - high speed. ... But higher energy particles in the cloud may be able to escape, he says. ...

... Tonight's Sky . ... Sky this Month . ... Behemoth black hole found in an unlikely place . ... black holes . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... Telescope and satellite probe violently variable black holes . ... Flickering black hole . ... These are among the fastest observations of a black hole ever obtained with a large optical telescope," Dhillon said. ... Only registered members of Astronomy.com are allowed to comment on this article. ...

Supernova 2009js in NGC 918 . This page is devoted to information on Supernova 2009js in NGC 918 . Basic information on this SN, including the last reported brightness, on this Supernova can be found on the main page . Information on the original web pages for many of these images can be found on the updates and links web pages. Discovered independently by Lick Observatory Supernova Search (USA) and Koichi Itagaki (Japan). ... 2009/10/11.44 . 17.2 . ... Joseph Brimacombe . ...

... Be/X-ray binaries and candidates", Natalya V. Raguzova and Sergei B. Popov, Astron. ... Population Synthesis of Binary Be Stars with Degenerate Companions in the Galaxy", Natalya Raguzova, Astrophysics and Space Science, v.281, p.641-649 (2002) . ... The Evolutionary Evidence for Be/Black Hole Binaries", Natalya V. Raguzova and Vladimir M. Lipunov, The Be Phenomenon in Early-Type Stars, IAU Colloquium 175, ASP Conference Proceedings, Vol. 214, edited by Myron A. Smith and Huib F. Henrichs. ... 1998 ...

... V4641 Sgr is known as a detached binary containing a 9 Msol. black hole and an A0 type companion. ... Spectra of V4641 Sgr were taken by us using SAO 1-m telescope between May 23.972 and 24.002 UT (the orbital phase of 0.35), wavelength range 3900-7500A, resolution 8A, S/N~30-40. ... These observations show essential light excess over the quiet light level seen only in the orbital phases between -0.25 and +0.25 with the maximum value of 0.15 mag in the V band at the black hole inferior conjunction. ...

... Abubekerov M.K., Lipunov V.M. "The Lower Temperature Limits Of Accretors" Astronomy Reports, 2003, Vol. 47, Issue 8, pp.679-684. ... Abubekerov M.K., Antokhina E.A., Cherepashchuk A.M. "The Masses of X-ray Pulsars in Binary systems with OB Supergiants" Astronomy Reports, 2004, Vol. ... Abubekerov M.K., Antokhina E.A., Cherepashchuk A.M., Shimanskii V.V. "The Mass of the Compact Object in the Low-Mass X-ray Binary 2S 0921-630" Astronomy Reports Astronomy Reports, 2006, Vol.50, Issue 7, pp.544-552. ...