Over the past decade, surveys in our Galaxy have expanded our understanding of planetary system evolution with the detection of 1000s of planets and protoplanetary disks, and 100s of debris disks, enabling us to piece together a complex picture of planet formation and system evolution.
Despite these recent advances however, the precise mechanisms driving the observed planetary system architectural diversity remain unclear, and in particular, the details that connect protoplanetary disks to main sequence planetary systems.
Understanding how this evolutionary stage proceeds is uniquely probed by young stellar objects (YSOs) at the intermediary class III epoch, where these have only just dispersed the bulk content of their protoplanetary disks.
In the last 3 years, new studies with Gaia DR2/3 have shown that many such class III stars have however been missing from star forming region membership lists, which have biased our understanding of disk evolution.
These updated (and vastly increased) stellar population lists are now however providing the most accurate view of the nearby Galaxy to-date, sharply enhancing the accuracy of exoplanetary system evolution studies.
In this poster I will discuss my ongoing research into circumstellar disk evolution at the class III epoch, including new submillimeter observational analyses of circumstellar dust and gas of YSOs in Taurus, Lupus and Upper Sco, utilising such brand-new Gaia-confirmed membership catalogs.