Astrochimistry – Spring 2013 Interstellar PAHs
Astrochimistry â Spring 2013 Interstellar PAHs - Course Pages of ...
Astrochimistry â Spring 2013 Interstellar PAHs - Course Pages of ...
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I. From Unidentified to Aromatic Infrared Bands<br />
I.3 The PAH hypothesis<br />
Still no individual spectroscopic identification<br />
Pilleri et al. 2009<br />
Pilleri et al. 2009<br />
Kokkin et al. 2008<br />
Not symmetric<br />
→ permanent electric dipole<br />
→ strong rotational emission<br />
…<br />
Undetected in Red Rectangle<br />
in the millimetric range (1→3mm)<br />
at IRAM-30m<br />
Electronic transition<br />
in the visible<br />
8
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