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Quasars & Active Galaxies
X-ray Astronomy Field Guide
Quasars & Active Galaxies
Questions and Answers
Quasars & Active Galaxies
Chandra Images
Quasars & Active Galaxies
Animations & Video: Quasars & Active Galaxies
Page 1234
Click for high-resolution animation
1. Comparing Different Black Holes
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This sequence shows four black holes from the Bootes field. The first two black holes are obscured by thick rings of gas. Because such a ring blocks certain types of radiation, these black holes are only are seen in X-ray (blue) and infrared (red) light. The last two black holes are not enshrouded by this ring of material, and, therefore, emit X-ray, infrared, and optical (green) radiation. These objects helps astronomers better understand the properties of these monster black holes.
[Runtime: 0:08]
(X-ray: NASA/CXC/CfA/R.Hickox et al.; Infrared: NASA/JPL/Caltech/P.Eisenhardt & D.Stern et al.; Optical: NOAO/B.Jannuzi & A.Dey et al.)

Related Chandra Images:

Click for high-resolution animation
2. Scale Chandra Images to Full Moon
QuicktimeMPEG This survey, taken in a region of the Bootes constellation, involved 126 separate Chandra exposures of 5,000-seconds each, making it the largest contiguous field ever obtained by the observatory. At 9.3 square degrees, it is over 40 times larger than the full moon seen on the night sky, which is shown in this graphic for scale.
[Runtime: 0:12]
(X-ray: NASA/CXC/CfA/R.Hickox et al.; Moon: NASA/JPL)

Related Chandra Images:

Click for high-resolution animation
3. Animation of Eruption from Supermassive Black Hole
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This animation depicts an eruption caused by a supermassive black hole. Gas and dust (reddish-brown disk) are being pulled around by the enormous gravity of the supermassive black hole, which is buried in the center of a large elliptical galaxy. The animation then zooms out to show the full view of the galaxy, which is surrounded by hot gas (red) that pervades the galaxy cluster. White jets, fueled from material falling onto the black hole, then erupt from the black hole and push gas backwards to create the dark cavities in the cluster gas.
[Runtime: 0:17]
View Stills
(NASA/CXC/A.Hobart)

Related Chandra Images:

Click for high-resolution animation
4. Animation of Centaurus A Arcs
QuicktimeMPEG This animation begins with the location of Centaurus A on the Chandra x-ray sky map. Next, it dissolves from the Chandra X-ray image to the DSS optical to the two NRAO radio images. The final frame fades in the full composite image with x-ray, optical and radio data combined.
[Runtime: 0:31]
(NASA/CXC/A.Hobart)

Related Chandra Images:

Click for high-resolution animation
5. Animation of How Supermassive Black Holes Affect the Formation of Massive Galaxies
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This animation begins by looking at the exterior of an elliptical galaxy. It then zooms into the region near the galaxy's massive central black hole. The sequence then shows how powerful jets of high-energy particles emanate from the vicinity of the black hole. These jets heat gas around the galaxy and stop the infall of matter into the galaxy, thereby limiting the galaxy's growth. This is what astronomers believe is happening in the cases of 4C41.17 and 3C294.
[Runtime: 0:22]
View Stills
(NASA/CXC/A.Hobart)

Related Chandra Images:

Click for high-resolution animation
6. Black Hole Animation
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*Broadcast Quality

This animation illustrates the activity surrounding a black hole. While the matter that has passed the black hole's "event horizon" can't be seen, material swirling outside this threshold is accelerated to millions of degrees and radiates in X-rays. At the end of the animation, the black hole is shown shrouded in a cloud of gas and dust, obscuring it from most angles at wavelengths other than the X-rays picked up by the Chandra X-ray Observatory.
[Runtime: 0:27]
View Stills
(NASA/CXC/A.Hobart)

Click for high-resolution animation
7. Illustrations of Black Hole Eclipse
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These artist's representations, which are not to scale, explain how a supermassive black hole and the hot gas disk around it are eclipsed. The first illustration shows how light from the bright disk surrounding the black hole can directly reach Chandra. The second illustration demonstrates how this light can be blocked by a dense cloud of gas, which causes only reflected light from the disk to reach Chandra.
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View Stills
(NASA/CXC/M.Weiss)

Related Chandra Images:

Click for high-resolution animation
8. Optical and X-ray Images of NGC 1365
QuicktimeMPEG Beginning with the optical image of NGC 1365, the view then changes to reveal Chandra's image of the central region. The bright source in the middle of the X-ray image is generated by a disk of gas about to fall into a supermassive black hole. When a dense cloud within NGC 1365 passed in front of the black hole and disk, high-energy X-rays from the disk were blocked. This allowed astronomers to measure the size of the disk.
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(X-ray: NASA/CXC/CfA/INAF/Risaliti; Optical: ESO/VLT)

Related Chandra Images:

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