EDUCATIONAL NEWS SCIENCE

‘Oumuamua may have came from a binary star system

What is ‘Oumuamua?

‘Oumuamua was first identified interstellar object found passing though our solar system. This was cylinder shape object identified in October 2017 by Pan-STARRS 1 survey telescope in Hawaii. After calculating the path of this object it was clear that it was not from our solar system. In Hawaiian language ‘Oumuamua means “the first messenger from afar reaching out to us” or “scout”.

How Big it was and what was it’s color?

`Oumuamua is faint and small. We are not sure how small exactly as we don’t know how reflective its surface is, but it’s definitely less than a kilometer long.`Oumuamuawas somewhat red and therefore very similar to that of some of our own comets and distant asteroids.

`Oumuamua was also tumbling. At first it was noted that ‘Oumuamua had a 7 or 8-hour spin period, but different measurements show that the spin is not regular, but it executes a complex tumbling motion that shows different views of the body at different times. `Oumuamua size was elongated and it changes in brightness over time imply that it is roughly cigar-shaped, with an axis ratio of 5:1 to 10:1.
Where could be it’s origin?
Th study, published in the journal Monthly Notices of the Royal Astronomical Society, Dr. Alan Jackson and his co-authors set about testing how efficient binary star systems are at ejecting objects. They also looked at how common these star systems are in the Galaxy.They found that rocky objects like ‘Oumuamua are far more likely to come from binary than single star systems. They were also able to determine that rocky objects are ejected from binary systems in comparable numbers to icy objects.
What is binary star system?
A binary star is a star system consisting of two stars orbiting around their common center.

Reported By: Sunil George – Age 14.

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