  We present new, multi-wavelength, high-resolution imaging of the luminous,
submillimeter galaxy, SMM J14011+0252, an interacting starburst at z = 2.56.
Our observations comprise optical imaging from the HST, sensitive radio mapping
from the VLA and CO observations from OVRO and BIMA. Aided by well-constrained
gravitational amplification, we use these new data to map the distribution of
gas and both obscured and unobscured starlight. The maps show that the gas and
star formation are extended on scales of >= 10 kpc, much larger than starbursts
seen in local ultraluminous galaxies, and larger than the rest-frame UV-bright
components of SMM J14011+0252, J1/J2. The most vigorous star formation is
marked by peaks in both the molecular gas and radio emission, ~1'' north of
J1/J2, in the vicinity of J1n, an apparent faint extension of J1. Using new
sub-0.5'' K-band imaging from UKIRT, we identify J1n as an extremely red object
(ERO). We suggest that while J1 and J2 are clearly associated with the submm
source, they are merely windows through the dust, or unobscured companions to a
large and otherwise opaque star-forming system. Hence, their rest-frame UV
properties are unlikely to be relevant for understanding the detailed internal
physics of the starburst.
