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The influence of eclipses in the stellar radio emission

Published online by Cambridge University Press:  12 September 2017

Caius Lucius Selhorst  and
Adriana Valio
Caius Lucius Selhorst
Affiliation:
NAT - Núcleo de Astrofísica Teórica - Universidade Cruzeiro do SulSão Paulo, SP, Brazil email: [email protected] IP&D - Universidade do Vale do Paraíba - UNIVAPSão José dos Campos, SP, Brazil
Adriana Valio
Affiliation:
CRAAM - Universidade Presbiteriana Mackenzie, São Paulo, SP, Brazil
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Abstract

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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.

Keywords

Eclipses - Stars: activity - Radio Continnum: stars
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S328: Living Around Active Stars , October 2016 , pp. 305 - 307
Copyright
Copyright © International Astronomical Union 2017 

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