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Orion Bar Overlay. Caption, Credits and Copyright
The Orion Bar's photodissociation region: the atomic/molecular transition zone
is traced by the 3.3 micron Polycyclic Aromatic Hydrocarbon emission (Blue),
the hot molecular gas (few 1000~K) is traced by the 2.12 micron H2 v=1-0 S(1) vibrational
emission (Green) and the warm molecular gas (~ 100 K) is traced by the 12CO J = 1-0 emission (Red
Courtesy BIMA Image Gallery, a selection of astronomical images obtained with the
BIMA millimeter-wave interferometer, posted on the BIMA Web server.
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Copyright, (c) 1995: Board of Trustees, University of
NCSA. Last modified 11/11/95.