– 31 – such as dynamical interactions, the Poynting–Robertson effect and radiation pressure. The rest of the non accreting objects, #5, 9, 13, 19, and 24, have L$_{D}$/L$_{∗}$ > 10 − 3 and could be in the process of being photoevaporated. 5.2.2. Close binaries Circumbinary disks are expected to be tidally truncated and have inner holes with a radius ∼ 2 × the orbital separation (Artymowicz & Lubow, 1994). It is believed that most PMS stars are in multiple systems (Ratzka et al. 2005) with the same semi-major axis distribution as MS solar-type stars (e.g., a lognormal distribution centered at ∼ 28 AU). As a result, ∼ 30% of all Ophiuchus binaries are expected to have separations in the ∼ 1-20 AU range. If the primodial disk has survived in such systems , it is likely to be in the form of a circumbinary disk with tidally truncated inner holes up to 40 AU in radius. These close binary systems could hence be classified as transition disks based on their IR SEDs. Four of our targets have companions close enough to suspect they could be responsible for the observed hole, namely sources # 12, 27, 24, and 23, in increasing order of projected separation. Source # 12 is a binary with a projected separation of ∼ 0.6 AU and λ$_{turn}$$_{−}$$_{off}$ = 8.0 µ m, which implies the disk must be a circumbinary one. However, given the long λ$_{turn}$$_{−}$$_{off}$ wavelength and tightness of the binary system, it seems unlikely that the present size of the inner hole is directly connected to the presence of the stellar companion. Source # 27 is triple system with projected separations of ∼ 0.3 AU and 41 AU and λ$_{turn}$$_{−}$$_{off}$ = 4.5 µ m. The IR excess could originate at a circumbinary disk around the tight components of the system or at a circumstellar disk around the wide component. Target #24 is also a triple system with projected separations of ∼ 7 and 105 AU and λ$_{turn}$$_{−}$$_{off}$ = 5.8 µ m. The IR excess could also in principle originate at a circumbinary disk around the tight components of the system. However, a circumprimary disk around source # 24-A is an equally likely