  Context. Centaurs are icy objects in transition between the transneptunian
region and the inner solar system, orbiting the Sun in the giant planet region.
Some Centaurs display cometary activity, which cannot be sustained by the
sublimation of water ice in this part of the solar system, and has been
hypothesized to be due to the crystallization of amorphous water ice.
  Aims. In this work, we look at Centaurs discovered by the Outer Solar System
Origins Survey (OSSOS) and search for cometary activity. Tentative detections
would improve understanding of the origins of activity among these objects.
  Methods. We search for comae and structures by fitting and subtracting both
Point Spread Functions (PSF) and Trailed point-Spread Functions (TSF) from the
OSSOS images of each Centaur. When available, Col-OSSOS images were used to
search for comae too.
  Results. No cometary activity is detected in the OSSOS sample. We track the
recent orbital evolution of each new Centaur to confirm that none would
actually be predicted to be active, and we provide size estimates for the
objects.
  Conclusions. The addition of 20 OSSOS objects to the population of 250 known
Centaurs is consistent with the currently understood scenario, in which drastic
drops in perihelion distance induce changes in the thermal balance prone to
trigger cometary activity in the giant planet region.
