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Polycyclic Aromatic Hydrocarbons and Astrophysics (Paperback, Softcover reprint of the original 1st ed. 1987)
Loot Price: R5,799
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Polycyclic Aromatic Hydrocarbons and Astrophysics (Paperback, Softcover reprint of the original 1st ed. 1987)
Series: NATO Science Series C, 191
Expected to ship within 10 - 15 working days
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The near Infra-Red emission of the Interstellar Medium is a very
puzzling subject. In the brightest regions, where spectroscopic
observa tions are possible from the ground, several bands (3.3 -
3.4 - 6.2 - 7.7 - 8.6 - 11.3 ~m) have been observed since 1973. The
absence of satisfying explanation was so obvious that they were
called "Unidenti fied IR Emission Bands". The puzzle still
increased when were known the first results of the general IR sky
survey made by the satellite IRAS. On a large scale, the near IR
emission of the Interstellar medium was expected to be very small
but it was observed to be about one third of the total IR emission
for our own galaxy ..* The situation has moved in 1984 when it was
suggested that a class of stable organic molecules, the Polycyclic
Aromatic Hydrocarbons (PAH's) could be at the origin of this near
IR emission. Initially based on the required refractory character
of particules that should be heated to high temperature without
subliming, this hypothesis leads to a sugges tive spectroscopic
similarity with the observed astronomical bands. This hypothesis is
attractive and it has many implications, for ins tance, the PAHs
would be the most abundant organic molecules in the universe.
However, many points have to be clarified and the different
consequences of this suggestion should be explored.
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