The influence of eclipses in the stellar radio emission

Abstract

Here we simulate the shape of a planetary transit observed at radio wavelengths. The simulations use a light curve of the K4 star HAT-P-11 and its hot Jupiter companion as proxy. From the HAT-P-11 optical light curve, a prominent spot was identified (1.10 Rp and 0.6 Ic). On the radio regime, the limb brighting of 30% was simulated by a quadratic function, and the active region was assumed to have the same size of the optical spot. Considering that the planet size is 6.35% of the the stellar radius, for the quiet star regions the transit depth is smaller than 0.5%, however, this value can increase to ~2% when covering an active region with 5.0 times the quiet star brightness temperature.

3 pages, 2 figures, IAUS 328: Living around active stars

References in corpus (4)

• TrES-1: The Transiting Planet of a Bright K0V Star
• Transit observations of the Hot Jupiter HD 189733b at X-ray wavelengths
• Stellar rotation--planetary orbit period commensurability in the HAT-P-11 system
• Planetary Transits with the ALMA Radio Interferometer