=====================================================================
==> In this proposal, more time is being requested for GGILMORE.BRWN_DWF
=====================================================================
Extended dark halos are well established around isolated unperturbed spiral
galaxies, and may also exist around ellipticals. There is a close coincidence
between the total mass in these spiral halos and the total baryonic mass in the
Universe, deduced from light element nucleosynthesis. Thus, dark halos may be
baryonic. The only forms for this dark baryonic matter which have not been
excluded are brown dwarfs or very old, cool PopIII white dwarfs. ISO
observations of edge-on spiral galaxy halos have (tentatively) detected excess
15micron emission, which may be associated with the dark matter, or may be
unexpected PopII gM stars. We will complement our LW3 data with 7micron data, to
distinguish between these possibilities, and to confirm that the flux seen by
ISOCAM is truly associated with the galaxies. We will increase our sample to
include a nearby, nearly edge-on dwarf spiral, which has the best-defined
rotation curve of any galaxy, and is highly dark-matter dominated at all
radii. The range in Hubble types this provides will test the ubiquity of galaxy
normal stellar halos as a viable option for the extended emission.