An Update on the Young V1298 Tau System as observed by CHEOPS, HST, and Spitzer

Young planets form a unique bridge between planet-forming protoplanetary disks and mature planets. In order to infer the internal and atmospheric structure of these young inflated planets, it becomes important to have high-precision measurements of their mass and radius. The V1298 Tau system, only a mere 23 Myrs old, is a keystone multi-planetary system hosting four transiting planets. Since the planets orbit a highly variable star, constraining the mass of the planets using radial velocities becomes a challenge. In such a scenario, using transit-timing variations (TTVs) provides another avenue to constrain the mass of the planets. 

In this poster, I present high-precision transit observations of the three innermost planets in the V1298 Tau system using the CHEOPS telescope. I provide an insight into the data analysis methodology used to encounter the unique systematics of CHEOPS. I also present the challenge that the high variability of the host star presents when fitting these observations with a transit model. Finally, I present the improvement in the uncertainty of the transit depth of the three young planets by an order of magnitude, place these observations in the context of HST and Spitzer observations of this system, and how these observations will help in constraining the mass of the planets using TTV models.