Chandra X-ray Observatory (CXO) image of the central region of the Andromeda Galaxy M31.
This X-ray image shows the central portion of the Andromeda Galaxy. The blue dot in the center of the image is a "cool" million degree X-ray source where Andromeda's massive central object, with the mass of 30 million suns, is located, which many astronomers consider to be a supermassive black hole. The X-rays are produced by matter funneling toward the massive object. Numerous other hotter X-ray sources are also apparent. Most of these are probably due to X-ray binary systems, in which a neutron star (or perhaps a stellar black hole) is in a close orbit around a normal star.
The image was made with Chandra's Advanced CCD Imaging Spectrometer (ACIS).
This image of the central region of the Andromeda Galaxy is a composite of
Chandra X-ray data (3 pixilated sources) and Hubble optical data ( red contours).
The supermassive central object of M31 lies within the highest optical contour on
the lower right. These highly accurate positions show that the very cool X-ray
source (blue) previously identified with the supermassive object in the center of
the galaxy is actually about 10 light years south of the center. A second, hotter
X-ray source, is found to be at a position consistent with the position of the
Credit: X-ray: NASA/SAO/CXC/M. Garcia et al., Optical: NASA/GSFC/T. Brown et al.
Last Modification: 14 May 2001