Some of our special aspects of our solar system: comets, fast clouds, planet dwarves in curious orbits and, if true, other stars far away from the Sun are approaching our system. kindergartens helter-skelter things
But the star flybys that can be played by planets, comets and asteroids are really capable of remodeling planet-based systems?
UC Berkeley and astronomers at the Stanford University believe they have found a burning gun.
A planet with orbiting a binary star stroke a star-shaped ice star, skated close to the 2-to-3-million-year-old system, after the planet, dust and gas dissolved.
If checked, the stellar closure argument tightens the volumes to help planetary bite ducts, and whether or not they have planetary orbits.
"It's one of the mysteries created by exoplanet analysis, we see systems that we see in the missing lines, although they are still in a flat and circular drive," said Paul Kalas, assistant professor of astronomy at UC Berkeley. "Perhaps a cosmic tsunami has rebuilt these systems and reordered everything around them, but we have not proved it. Our paper shows one of these vitamins, gently, in the effects of planetary galaxy systems."
Astronomers are looking for a flysch star from the solar system, but since the 4.600 million years ago, most of the evidence has been cold. Star system researched by astronomers, HD 106906 and 300 Earth's darkest moon, in the direction of the Crux constellation, is very young, only 15 million years old.
Kalas and Robert De Rosa, former UC Berkeley postdoc, now part of the Kavli Institute for Particle Astrophysics and Cosmology Researchers at Stanford, describe their findings in a paper approved by the publication. Astronomy Magazine and now available online.
Kalas examines young and newly formed planetary systems to understand what happened in the early years of our solar system, first of all in HD 106906 in 2015, when massive planet could have a huge orbit. Planeta, called HD 106906 b, has a mass of 11 Jupiter, and the 106906 orbit of the HD reveals a new generation of stars. The orbit is distinguished by 21 degrees, from the star plan of all the other materials. The current location is at least 738 times higher, far away from the star than the sun is greater than the sun or Pluto is 18 times higher than the sun.
Kalas used the Gemini Planet Imager Gemini Telescope in the Chilean Andes and the Hubble Space Telescope to zoom in to HD 106906 and the star also found a lopsided comet belt. The strange orbit of the planet and the dust disk are asymmetrical, as the young system interrupted.
Kalas and his colleagues, including De Rosa, proposed that the planet be pulled out of the solar system, while the planet's other planet still had no interaction or star. Kalas and De Roses believe that both happened: when it entered into an eccentric orbital planet when it was dangerous from the star kinetic star, a scenario proposed by the Laetitia Rodet theoretician and the Grenoble Observatory in France in 2017 was proposed. The gravitational velocity of the binary rapidly released planetary outer space, but the streaming stars continue to bounce the orbit from the binary to the planet.
The subject space observers provided the necessary data to test hypothesis. The theme, launched by the European Space Agency in 2012, includes 1.3 million star Milky Way Galaxy measurements for measuring distance, position and movement, a catalog of 10,000 times higher than Hipparcos.
Kalas and De Rosa met Gaia's 461 stars on the HD 106906 and calculated positions in real time – the reverse of the glass clock, so to speak, and approaching another binary star for about 3 million years. changing planetary system
"What we did here really found an extra shot of the HD 106906 b, the second shot, so it survived, it would be like a hypothetical Planet Nine in our solar system," said Kalas. .
They also found a Binary star on the 5-degree drive of the system's disk, and it's even more likely that the encounter would have a strong and lasting impact on HD 106906.
This double shot could be important in stabilizing stars, asteroids and comets around the stars, said Kalas.
"Analyzing the planet's HD 106906 system is an Oort kite cloud that is commonly found around the sun," he said. "Our giant giant planets gravitationally kicked out a lot of comedy away from far away, many of which were completely expelled, such as becoming an object of stars, but others passed through the stars, and asteroid made an asteroid composition with other planetary encounters, It saves even from the ejection perspective. The event chain kept the majority of ultraviolet rays of the solar system on the solar system for millions of years. "
Kalas expects future observations, such as an updated Gaia measurements catalog, to clarify the meaning of the HD 106906 flyby.
"We started 461 suspects and found ourselves in the field of two crimes," he said. "His exact mission will be revealed when we gather more evidence."
The work is sponsored by the National Science Foundation (AST-1518332), sponsored by the National Aeronautics and Space Administration (NNX15AC89G) and Nexus for Exoplanet System Science (NExSS), sponsored by the NASA Science Department (NNX15AD95G).