orion-in-the-infrared-and-millimeter.html

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         title="Permalink to Orion in the Infrared and Millimeter">Orion in the Infrared and Millimeter</a></h2>
 
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    <abbr class="published" title="2012-09-20T20:02:00-06:00">
      2012/09/20
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    <address class="vcard author">
      By <a class="url fn" href="https://keflavich.github.io/blog/author/adam-keflavichgmailcom.html">Adam (keflavich@gmail.com)</a>
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    <img alt="" src="https://lh5.googleusercontent.com/-lUlzplbIvGM/T8VTYm05J8I/AAAAAAAAHMc/gNoFfwuZ7uI/s1500/OrionA_4096sq_WISE_bolo_mosaic_rotated_blackbg_small.png" />
<p>This composite image of the Orion A Giant Molecular Cloud star-forming
complex shows infrared emission from the WISE and MSX missions in 4
micron (red), 12 micron (blue), and 22 micron (green) emission with
Bolocam Galactic Plane Survey 1.1mm emission overlaid in yellow/orange.
The Orion A region is frequently featured in astronomical images:</p>
<blockquote>
<ul class="simple">
<li><a class="reference external" href="http://apod.nasa.gov/apod/ap110917.html">http://apod.nasa.gov/apod/ap110917.html</a></li>
<li><a class="reference external" href="http://apod.nasa.gov/apod/ap120212.html">http://apod.nasa.gov/apod/ap120212.html</a></li>
<li><a class="reference external" href="http://apod.nasa.gov/apod/ap120206.html">http://apod.nasa.gov/apod/ap120206.html</a></li>
<li><a class="reference external" href="http://www.eso.org/public/images/eso1219c/">http://www.eso.org/public/images/eso1219c/</a></li>
<li><a class="reference external" href="http://www.eso.org/public/news/eso1209/">http://www.eso.org/public/news/eso1209/</a></li>
</ul>
</blockquote>
<p>but its tail tends to be ignored. This quiescent region is the source of
the next generation of stars, although the relatively small mass
concentrations imply that no massive stars like the bright Theta 1C that
powers the Orion Nebula will form.
The infrared colors show all sorts of stars including protostars. The
infrared can pierce through the dust and find young stars still forming.
The green and blue bands also see diffuse clouds of dust being
illuminated by the central stars of the Orion nebula.
The yellow 1.1 mm dust emission shows the coldest dust that is shielded
from external radiation. These cold clumps contain enough mass to form
new stars...</p>

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