the planets show that the planets the discs disappear within about 10 million years, meaning that there were no discounters for more than 4 billion years in our solar system to look for them elsewhere and gather evidence to observe to test theories of formation the planets, Isela and colleagues are looking for many young stars where they can directly watch disks and planets that are still forming inside them. In the new study, Isella and colleagues analyzed the observations made by ALMA in 2017
"There are several candidate planets found in the discs, but this is a whole new field, and they are all still under discussion" said Aisella. "(PDS 70b and PDS 70c) are among the strongest because they have independent observations with various tools and techniques."
The PDS 70 is a dwarf star around three-quarters of the mass of the sun. Both planets are 5-10 times larger than Jupiter, and the innermost, the PDS 70 b, travels about 1.8 billion miles from the star, approximately the distance from the Sun to Uranus. PDS 70 c is a billion miles farther in orbit around the size of Neptune.
PDS 70 b was first unveiled in 2018 in infrared light images of a planet hunting tool called SPERA in the very large telescope of the European Southern Observatory. (VLT). In June, astronomers use another VLT instrument called MUSE to observe a visible wavelength of light known as H-alpha, which is emitted when hydrogen comes to a star or planet and becomes ionized. Alpha gives us more confidence that these are planets, as it suggests that they are still pumping gas and dust and growing up, "says Aisella.
ALMA's observations of millimeter wavelengths provide even more evidence.
Isela said the direct observation of planets with circular planes could allow astronomers to test the theories of the formation of the planet. about how the planets are formed, and now we finally have the tools to make direct observations and start answering questions about how our solar system is formed and how other planets can form. " 04] She is Assistant Professor of Physics and Astronomy and Earth Sciences, Ecology and Planetary Science at Rice and co-researcher of the CLEVER Planets project, funded by NASA.
The co-authors of the study include Myriam Benisty both at the University of Chile and at the University of Grenoble Alps, Richard Dee of the University of Michigan, Jaehan Bae of the Carnegie Institution for Science, Miriam Kepler of the Max Planck Astronomy Institute, Stefano Fachini from the European Southern Observatory and Laura Perez from Universidad de Chile.
The research was supported by the National Science Foundation, the French National Agency for Research, NASA, the Chilean National Science and Technology Research Commission, the Chilean National Science and Technology Development Fund, the European Horizon 2020 and the European Southern Observatory.