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Home https://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/ Science https://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/ Massive collision in planetary system Kepler 107 – ScienceDaily

Massive collision in planetary system Kepler 107 – ScienceDaily



Since 1995, the first extrasolar planet was discovered, nearly 4000 planets have been found around the nearest stars. This allows us to study a wide variety of configurations for these planetary systems. The evolution of the planets orbiting other stars can be primarily influenced by two phenomena: the evaporation of the upper layers of the planet due to the effect of X-rays and ultraviolet radiation from the central star and of the effects of other celestial bodies of the magnitude of A planet.

The previous effect has been observed a number of times in extrasolar systems, but so far there has been no evidence of the existence of major consequences as it appears to have occurred in the Kepler 107 system.

The central star, Kepler 1

07, is slightly larger than the Sun, and has four planets rotating around it; It was the two innermost planets that drew the interest of astrophysicists. Using data from NASA's Kepler satellite and from the National Galileo Telescope (TNG) at the Roque de los Muchachos Observatory (Garafía, La Palma, Canary Islands), the team determined the star's parameters and measured the radii and masses of these planets. Although the inner two have similar radii, their masses are very different. In fact, the other is three times closer than the first.

The extraordinarily high density of the planet Kepler 107c is more than twice the size of Earth. This unusual density for a planet has fascinated scientists and suggests that its metallic core, its closest part, is anomalously large for a planet.

This would still be considered normal if it were not the prediction that photo evaporation causes the densest planet in a system to be the closest to its star. To explain how it is possible that in this case the nearest one only has half the density of the other, the hypothesis was suggested that the planet Kepler 107c was formed as a result of a great impact. This effect must have torn its outer layers so that the central core is left as a much larger fraction than before. After tests performed via simulations, this hypothesis seems to be most likely.

This study will give us a better understanding of the formation and development of exoplanets. Specifically, it selects the importance of the relationship between the star's physics and exoplanetary research. "We need to know the star to better understand the planets that are in orbit around it," said Savita Mathur, an IAC researcher at Tenerife and one of the article's authors. "In this study, we made a seismic analysis to estimate the parameters of the star hosting the planet. Asteroseismology plays a key role in the field of exoplanets because it has been shown to be one of the best methods for precise characterization of Therefore, over the last decade, it has become one of the most important methods for characterizing stars, and it will remain so in the years to come, thanks to the space mission of discovering exoplanets: TESS (NASA) and PLATO (ESA ). [19659007] History Source:

Materials supplied by Instituto de Astrofísica de Canarias (IAC) . Note: Content can be edited for style and length.


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