  Environmental effects, such as stellar fly-bys and external irradiation, are
thought to affect the evolution of protoplanetary disks in clustered star
formation. Previous ALMA images at 225 GHz of the ISO-Oph 2 binary revealed a
peculiar morphology in the disk of the primary, perhaps due to a possible
fly-by with the secondary. Here we report on new ALMA continuum observations of
this system at 97.5 GHz, 145 GHz and 405 GHz, which reveal strong morphological
variations. Multi-frequency positional alignment allows to interpret these
spectral variations in terms of underlying physical conditions. ISO-Oph 2A is
remarkably offset from the centroid of its ring, at all frequencies, and the
disk is lopsided, pointing at gravitational interactions. However, the dust
temperature also varies in azimuth, with two peaks whose direction connects
with HD 147889, the earliest-type star in the Ophiuchus complex, suggesting
that it is the dominant heat source. The stellar environment of ISO-Oph 2
appears to drive both its density structure and its thermal balance.Simon
Casassus, Lucas Cieza, Miguel C\'arcamo, \'Alvaro Ribas, Valentin Christiaens,
Abigali Rodr\'iguez-Jim\'enez, Carla Arce-Tord, Trisha Bhowmik, Prachi Chavan,
Camilo Gonz\'alez-Ruilova, Rafael Mart\'inez-Brunner, Valeria Guidotti,
Mauricio Leiva
