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Antennae:
Chandra Finds Abundance of Ultraluminous X-ray Sources


Antennae
Credit: NASA/SAO/CXC/G.Fabbiano et al.

This Chandra X-ray image shows the central regions of two colliding galaxies known collectively as "The Antennae." The latest Chandra data reveal a large population of extremely bright X-ray sources in this area of intense star formation. These "ultraluminous" X-ray sources, which emit 10 to several hundred times more X-ray power than similar sources in our own Galaxy, are believed to be either massive black holes, or black holes that are beaming their energy toward Earth. In this X-ray image, red represents the low energy band, green intermediate and blue the highest observed energies. The white and yellow sources are those that emit significant amounts of both low- and high-energy X-rays.

The Antennae Galaxies, about 60 million light years from Earth in the constellation Corvus, got their nickname from the wispy antennae-like streams of gas seen by optical telescopes. These wisps are believed to have been produced by the collision between the galaxies that began about 100 million years ago and is still occurring.

Fast Facts for Antennae:
Credit  NASA/SAO/CXC/G.Fabbiano et al.
Scale  Image is 4.0 arcmin across.
Category  Normal Galaxies & Starburst Galaxies
Coordinates (J2000)  RA 12h 01m 53.70s | Dec -18 52' 35.5''
Constellation  Corvus
Observation Dates  December 1, 1999
Observation Time  20 hours
Color Code  Intensity
Instrument  ACIS
Also Known As NGC 4038, NGC 4039
Distance Estimate  60 million light years
Release Date  June 05, 2001