The following document lists the file abstract/DLUTZ_M82LINEM.abs
from catalogue VI/111.
A plain copy of the file
(without headers/trailers) may be downloaded.
We propose to study the transition between the region of enhanced
star formation and the more quiescent disk in the prototypical
starburst galaxy M82, by mapping a number of diagnostic emission
lines along the major axis. This will provide a characterization
of the "super photon-dominated region" that likely marks the
transition from the central starburst to the molecular ring and
undisturbed parts of M82.
M82 represents the unique case of a starburst galaxy suitable
for such a spatially resolved study with ISO.
We have chosen diagnostic lines, mainly from the 4-12 micron
wavelength range offering best spatial resolution, that will
allow to
1) Determine the excitation of the ionized medium by observation
of lines of [ArII] and [ArIII].
2) Study emission of several transitions of warm molecular
hydrogen, constraining its temperature, and of [SiII] from
photon-dominated regions.
3) Determine the temperature and density character of the
[FeII] emitting medium, to which HII regions, photon-
dominated regions and supernova remnant shocks possibly
contribute significantly.
During phase 2 proposal entry, the spatial sampling had to be decreased
to meet the allocated time. If overheads decrease in the future, this should
be restored at least partly to fully achieve the scientific goal.