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.
@article{arxiv.1703.00877,
title = {The influence of eclipses in the stellar radio emission},
author = {Caius L. Selhorst and Adriana Valio},
journal= {arXiv preprint arXiv:1703.00877},
year = {2017}
}
Comments
3 pages, 2 figures, IAUS 328: Living around active stars