Planets that have been dead for nearly a billion years may, according to a new study, "send" their signals in space.
According to research published in the Monthly Notices of the Royal Astronomical Society, planets that have been dissected from their stars to their cores interact with this star (probably at the end of its lifetime and thus a white dwarf) and send thanks to the Magnetic field between the two celestial radio waves. The radio waves are often recorded by radio telescopes on Earth.
"There is a sweet spot for the detection of these planetary cores: a nucleus too close to the white dwarf would be destroyed by tidal forces, a too distant core would be undetectable," the lead author of the study, Dimitri Veras, said in a statement
FROZEN EARTHLY PLANETS COULD SUPPORT LIFE: STUDY
Even if the magnetic field is too strong, it would push the core into the White Dwarf and destroy it, Veras continued. "Therefore, we should only look for planets around these white dwarfs with weaker magnetic fields at a distance between about 3 solar radii and the Mercury-Sun distance."
It is still unclear how long the planetary nuclei can survive after the planet has moved out from the star. The researchers' model states that in certain cases the nucleus can exist for more than 100 million years and possibly up to 1 billion years.
Veras added that no one has yet found the "bare core" of a large planet. a big planet by magnetic signatures or a big planet around a white dwarf. "Therefore, a discovery here would be 'first fruits' in three different senses for planetary systems," Veras said.
Nevertheless, the researcher and his co-author, Professor of Pennsylvania State University Alexander Wolszczan, believe that research will "We will use the results of this work as guidelines for the design of radio searches for planetary nuclei around white dwarfs," Wolszczan We believe that our chances for exciting discoveries are very good for many of them. "
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