Home Physics Matter around young stars helps astronomers explore our star story

Matter around young stars helps astronomers explore our star story

Astronomers map aluminum monoxide clouds (AIO) around distant sources of young stars I. This finding clarifies some important details about how our solar system represents, and ultimately we become. The limited distribution of clouds shows that AlO gas condenses quickly into

dense grains, showing what the early stages of the evolution of our Sun are like.

Professor Shogo Tachibana of the UTokyo Organization for Planetary and Space Sciences has a passion for space. From small things like meteorites to big things like stars and nebulae huge clouds of gas and dust in space – he was forced to investigate the origin of our solar system. I always wondered about the evolution of our solar system, what would happen before billions of years, he said. This question led me to study the physics and chemistry of asteroids and meteorites.

Any type of space rock is in great demand by astronomers, because these stones remain largely unchanged when the sun and planets form from a cloud of spinning gas and dust. They contain records of the conditions at that time – usually considered 45.6 million years ago – and their characteristics such as composition tell us about this initial condition.On my desk there was a small piece of Allende meteorite, which in 1969 fell on mostly dark land, but there were several scattered white inclusions (foreign objects trapped in the rock) and they were important, Tachibana said.

These patches are rich in calcium and aluminum (CAI), which are the first solids of our solar system. Minerals at CAI show that our young solar system must be very hot. The physical dating technique of this mineral shows the age of a very specific solar system. However, Tachibana and his colleagues wanted to expand the details of this development stage.

There is no time machine to explore our own past, so we want to see young stars who can share trains with their own, Tachibana said. With the Alakama Large Millimeter / submilimetrovi Array (ALMA) finding emission lines – chemical traces – for AlO that leak from round discs (gas and dust around stars) a great young candidate for Source Orion I. It’s not exactly like our sun, but good begins. ALMA is a perfect tool because it provides very high resolution and sensitivity to reveal the AIO distribution around stars. At present, there is no other tool that cannot make such observations.


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