Testing the Double Detonation SN Ia Progenitor Scenario: A High Precision Proper Motion Survey of the SN 1006 Remnant

Despite decades of intense scrutiny, the origins of Type Ia supernovae (SNe Ia) remain uncertain, with each popular progenitor scenario proving respectively difficult to observationally support. Recently, a contender known as the dynamically driven double-degenerate double-detonation (D6) scenario has been looked to as one of the most promising explanations for SNe Ia. In this scenario, the primary in a double white dwarf system that is on the path to merger prematurely detonates. The D6 scenario predicts that the companion survives the explosion and resides within the supernova remnant as an extremely fast moving, over-luminous white dwarf. Here, I will present a high precision astrometric survey, performed with the Dark Energy Camera and aligned to the Gaia eDR3 reference frame, of the SN 1006 Galactic supernova remnant conducted to search for the existence of such a star. I will confront the D6 scenario with our findings, focusing on the constraints posed by these results as well as the limitations of our search.