The following document lists the file abstract/JKOORNNE_CDH2HD_A.abs
from catalogue VI/111.
A plain copy of the file
(without headers/trailers) may be downloaded.
We propose to use ISO-SWS & LWS in their Fabry-Perot modes to observe the H2 and HD pure rotational lines at 28.2 and 112.1 um due to cold (ground-state) molecular hydrogen in the plane of our Galaxy, as seen in absorption against strong IRAS sources. These transitions must be observed from space, and ISO is the only current or future mission with adequate capabilities. The combination of choice background-sources with an optimum observing strategy will yield the most sensitive search ISO is capable of. The resulting data will significantly constrain the relation between the cold molecular component and the dark matter required by dynamical studies of spiral and irregular galaxies.