Contents of: VI/111/./abstract/JCERNICH_SPEC_LWS.abs

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==> In this proposal, more time is requested for JCERNICH.CERNI_4
Radio observations of warm molecular clouds provide a partial picture of their
molecular  content.  Some molecules are observed from the emission of only one
rotational  line,  other  from  a few, and most of the molecules that probably
exist in these clouds are never observed. However, mid and far IR spectroscopy
with  ISO  can provide a full description of the molecular content of the most
conspicuous  molecular  clouds  of our galaxy for a moderate cost in observing
time. We propose to carry out a full resolution SWS grating survey between 2.4
and  45  um  in  some  prominent  molecular  clouds  as SgrA, W51-IRS1, SgrB2,
Orion-IRC2,  M17,  etc  (see  Table 1). In order to fully explore the infrared
spectrum  of these conspicuous clouds, we also propose to carry out a LWS fast
scanning FP survey in some of these sources.
In  addition to the molecular content of these warm molecular clouds, the cold
dark  clouds in their line of sight will also produce strong absorptions. They
will  be  easily  recognized  from the low number of ro-vibrational lines that
will  appear  and in the case of SgrA because the large velocity shift between
it  and  the  local cold dark clouds. The proposed observations will provide a
full  database  of  the  molecular content of warm molecular clouds and of the
local  cold  dark  clouds.  In  addition to the normal and suspected molecular
bands  that  these  clouds will present, many new molecules will be seen. This
survey  will  also  provide  a  detailed  database  the  next  two decades for
spectroscopic and physical studies of warm molecular cloud. We stress that one
of  the  last  unexplored  windows  of  the  electromagnetic spectrum of these
prototypical clouds will be finally open by the ISO spectrometers.
The  time  granted for proposal CERNI_4 allowed us to carry the SWS spectra of
SgrB2,  M17,  W51  and NGC6334N together with a partial LWS-FP survey of Sgr A
(scheduled  on  the  satellite for the first week of October. We would like to
complete  these FP observations and to carry out a SWS06 spectrum of Oria-IRC2
and SgrA (already proposed in CERNI_4).

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