Mapping the distribution of OB stars and associations in Auriga

OB associations are important probes of recent star formation and Galactic structure. In this study, we focus on the Auriga constellation, an region due to its numerous young stars, star-forming regions open clusters. We show using \textit{Gaia} data that two previously documented associations, Aur OB1 OB2, too extended in proper motion distance be genuine encouraging us revisit census with modern techniques. identify 5617 candidate stars across photometry, astrometry our SED fitting code, grouping these into 5 high-confidence HDBSCAN. Three replacements historical pair - OB2 is divided between a foreground background association while other completely new. connect surrounding clusters regions, analyse them physically kinematically, constraining their ages through combination 3D kinematic traceback, position members HR diagram connection known age. Four expanding, up few tens Myr. Finally, age gradient spanning several coincides Perseus spiral arm over last $\sim$20 Myr field view.