Some Science Goals
Our primary driver for building EXES is the study of molecular gas in quiescent clouds and in protostellar disks. For maximum sensitivity and to resolve line profiles, we want to achieve 2-3 km/s resolution.
We have prepared some simple simulations to illustrate the possibilities of high resolution spectroscopy.
The second simulation considers the H_2 rotational emission from a protostellar disk with a gap. The three lowest energy H_2 transitions from a Keplerian disk are considered. The disk has no continuum and a temperature distribution that scales as T proportional to r(-.5) with T at 1 AU=300 K. The solid line profiles come from a disk with emission for 0.1 AU <= r <= 10 AU. The dotted line profiles come from an identical disk except for a 1 AU gap at 3 AU. All spectra have been normalized to a peak amplitude of 1 and displaced vertically by addition of an arbitrary constant for display purposes.