Chandra peers into the Large Magellanic Cloud
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Chandra peers into the Large Magellanic Cloud
The X-ray Observatory's High Resolution Camera
catches extraordinary pictures of a distant supernova remnant.
Sept.
14, 1999: The High Resolution Camera on the Chandra X-ray
Observatory was placed into focus for the first time on August
30, 1999. Its first target was LMC X-1, a point-like source of
X-rays in the Large Magellanic Cloud (LMC). The LMC is a companion
galaxy to the Milky Way about 180,000 light years from Earth.
After checking the focus with LMC X-1 the camera was then turned
toward N132D, a remnant of an exploded star also located in the
Large Magellanic Cloud. The resulting image (right) shows details
never before seen in this distant object.
Above: Thousands of years after a star explodes, an expanding remnant may still glow brightly. Such is the case with N132D, a supernova remnant located in the neighboring Large Magellanic Cloud galaxy. This image is one of the first ever taken with the High Resolution Camera onboard the orbiting Chandra X-ray Observatory. [more]
"These were preliminary test observations," emphasized
Dr. Stephen Murray, of the Harvard-Smithsonian Center for Astrophysics,
located in Cambridge, Mass. Murray is principal investigator
for the High Resolution Camera. "But we are very pleased
with the results. All indications are that the High Resolution
Camera will produce X-ray images of unprecedented clarity."
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The N132D supernova remnant appears to be colliding with a giant molecular cloud, which produces the brightening on the southern rim of the remnant. The molecular cloud, visible with a radio telescope, has the mass of 300,000 suns. The relatively weak X-radiation on the upper left shows that the shock wave is expanding into a less dense region on the edge of the molecular cloud. A number of small circular structures are visible in the central regions and a hint of a large circular loop can be seen in the upper part of the remnant. Whether the peculiar shape of the supernova remnant can be fully explained in terms of these effects, or whether they point to a peculiar cylindrically shaped explosion remains to be seen.
"The image is so rich in structure that it will take a while to sort out what is really going on," Murray said. "It could be multiple supernovas, or absorbing clouds in the vicinity of the supernova."
Left: The "Cas A" supernova remnant
posed for Chandra's official first light image. Learn
more about Cas A. The image links to a 533x533-pixel,
54K JPG. Or, click here for a 2133x2133-pixel,
1.4MB JPG. Image credit: NASA and Chandra Science Center
The unique capabilities of the High Resolution Camera stem from the close match of its imaging capability to the focusing power of the mirrors. When used with the Chandra mirrors, the High Resolution Camera will make images that reveal detail as small as one-half an arc second. This is equivalent to the ability to read a stop sign at a distance of 12 miles. The checkout period for the High Resolution Camera will continue for the next few weeks, during which time the Chandra science team expects to acquire images of other supernova remnants, star clusters and starburst galaxies.
NASA's Marshall Space Flight Center in Huntsville, Ala., manages the Chandra X-ray Observatory for NASA's Office of Space Science, NASA Headquarters, Washington, D.C. The Smithsonian Astrophysical Observatory's Chandra X-ray Center in Cambridge, Mass., manages the Chandra science program and controls the observatory for NASA. TRW Space and Electronics Group of Redondo Beach, Calif., leads the contractor team that built Chandra.Web Links
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