{"knowledge_schema": {"broad_category": "Astronomy \u2192 Stellar Dynamics \u2192 Binary Star Systems", "refinement": "This problem involves analyzing the properties of binary star systems, specifically their mass and radial velocity variations during eclipses.", "specific_scope": "The focus is on comparing the mass of two binary star systems (A and B) based on their radial velocity amplitudes and eclipse periods.", "goal": "Calculate the mass ratio of system A to system B using the given radial velocity data and eclipse periods."}, "summary": "This problem pertains to the study of binary star systems in astronomy, where we analyze the mass of two systems based on their radial velocity variations and eclipse periods. The task is to determine the mass ratio of system A to system B, which involves applying principles of stellar dynamics. The goal is to find out how much more massive system A is compared to system B, leading to the conclusion that system A is 0.4 times more massive than system B."}