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Planets have been detected in circumbinary orbits in several differentsystems, despite the additional challenges faced during their formation in suchan environment. We investigate the possibility of planetary formation in thespectroscopic binary CS Cha by analyzing its circumbinary disk. The system wasstudied with high angular resolution ALMA observations at 0.87mm. Visibilitiesmodeling and Keplerian fitting are used to constrain the physical properties ofCS Cha, and the observations were compared to hydrodynamic simulations. Ourobservations are able to resolve the disk cavity in the dust continuum emissionand the 12CO J:3-2 transition. We find the dust continuum disk to beazimuthally axisymmetric (less than 9% of intensity variation along the ring)and of low eccentricity (of 0.039 at the peak brightness of the ring). Undercertain conditions, low eccentricities can be achieved in simulated diskswithout the need of a planet, however, the combination of low eccentricity andaxisymmetry is consistent with the presence of a Saturn-like planet orbitingnear the edge of the cavity.

The morphology of CSCha circumbinary disk suggesting the existence of a Saturn-mass planet