  Terzan 5 is the only Galactic globular cluster that has plausibly been
detected at very-high energies by the High Energy Stereoscopic System. It has
an unexpectedly asymmetric very-high-energy morphology that is offset from the
cluster center, in addition to a large-scale, offset radio structure and
compact diffuse X-ray emission associated with this cluster. We present new
data from the Fermi Large Area Telescope on this source. We model the updated
broadband spectral energy distribution, attributing this to cumulative pulsed
emission from a population of embedded millisecond pulsars as well as unpulsed
emission from the interaction of their leptonic winds with the ambient magnetic
and soft-photon fields. In particular, our model invokes unpulsed synchrotron
and inverse Compton components to model the radio and TeV data, cumulative
pulsed curvature radiation to fit the Fermi data, and explains the hard Chandra
X-ray spectrum via a "new" cumulative synchrotron component from
electron-positron pairs within the pulsar magnetospheres that has not been
implemented before. We find reasonable spectral fits for plausible model
parameters. We also derive constraints on the millisecond pulsar luminosity
function using the diffuse X-ray data and the Chandra sensitivity. Future
higher-quality spectral and spatial data will help discriminate between
competing scenarios (such as dark matter annihilation, white dwarf winds or
hadronic interactions) proposed for the broadband emission as well as constrain
degenerate model parameters.
