Exoplanet transit variability: bow shocks and winds around HD 189733b

摘要: By analogy with the solar system, it is believed that stellar winds will form bow shocks around exoplanets. For hot Jupiters shock not directly between planet and star, causing an asymmetric distribution of mass exoplanet hence transit. As orbits thorough varying wind conditions, strength geometry its change, thus producing transits shape. We model this process using magnetic maps HD 189733 taken one year apart, coupled a 3D model, to determine local conditions throughout orbital path planet. predict time-varying density forms magnetosphere simulate transit light curves. Depending on nature field, wind, we find both duration ingress time can vary when compared optical conclude consecutive near-UV curves may significantly therefore provide insight into structure evolution wind.