Exoplanets are cosmic bodies or planets that orbit a star outside our solar system. According to NASA, more than 5,000 exoplanets have been confirmed so far. Researchers usually rely on the transit method to find exoplanets. It uses optical telescopes for this purpose and has some limitations. Now, a new method has been developed that can help observe exoplanets at radio wavelengths using a radio telescope. The transit method is a powerful tool for observing the brightness of a star over time.
If the brightness drops slightly, it could mean that a planet is orbiting, blocking some of the light. However, in order to detect an exoplanet using this method, the planet would have to pass between us and the star.
When it comes to observing exoplanets using radio wavelengths, it can be quite difficult. This is because most planets do not emit much radio light. Meanwhile, most stars emit radio light that can be quite variable due to solar flares and other factors. A large gas planet like Jupiter has been found to be radio-luminous, due to its strong magnetic field. Its brightness is such that it can be detected with a homemade radio telescope.
However, astronomers are yet to detect a clear radio signal from a Jupiter-like planet. in new studyResearchers have tried to find out what the signal could be like. He has developed a model of magnetohydrodynamics (MHD) and applied it to the planetary system named HD 189733. They have simulated the interaction between the star’s stellar wind and the planet’s magnetic field and made calculations around the planet’s radio signal.
Observations suggested that the planet would produce a clear light curve. This light is a radio signal that changes due to the motion of the planet. It was also noted that this method could help detect the transits of a planet passing in front of its star. In this case the radio signals will have distinctive features that will help astronomers understand the size and strength of the planet’s magnetosphere.