The “possible discovery” of the giant moon outside the solar system!
The Milky Way must be completely full of moons when you think about it.
However, although we have so far confirmed 5,000 exoplanets, exomons are still rare. A temporary discovery was made in 2017; Now there is a second filter to add to the panel.
Named Kepler-1708 Pi, Candidate Exomon orbits an exoplanet orbiting a star about 5,500 light-years away. The evidence so far is that it is very large – about 2.6 times the size of Earth and gaseous.
Pie Kepler-1625, about 8,000 light-years the size and mass of Neptune (likely gas), is similar to Exomun’s prime candidate and orbits the exoplanet several times more than the mass of Jupiter. The outer moon candidates and their outer planets orbit their stars at great distances.
“Astronomers have so far discovered more than 10,000 extraterrestrials, but exomons pose the biggest challenge,” said David Kipping, an astronomer at Columbia University. Any investigation is generally bizarre. Great discoveries can easily be made with our limited sensitivity. “
The Exomune candidate was revealed during a search for data collected by the Kepler space telescope.
Kepler’s mission is to search for aliens. This is difficult because exoplanets are so small and dark that most of the time they cannot be seen directly; You should try to find her by looking at the very small effects she has on her host stars.
In Kepler’s case, looking at the stars, looking for smooth, low slopes of brightness, means something is moving a constant distance between us and the star – in other words, an asteroid orbiting the solar system. . These very dark spikes are known as unstable light curves.
In data from Kepler and later Hubble, the researchers identified a faint signal and the transport curve of the bag exoplanet Kepler-1625. They then went back to the data and looked for those signals.
They analyzed Kepler data for 70 exoplanets. Only one asteroid, Kepler-1625b, matched Exomon’s signal; But researchers say that is exactly what is happening.
The Kepler-1708 bi, like its predecessor, is not yet confirmed; In fact, some astronomers have argued that the Kepler-1625 pie is a trace of an exomon, suggesting instead that it is an artifact of signal data reduction.
To avoid repeating such criticisms, the researchers this time calculated the probability that the Kepler-1708 bi-signal is an artifact; And only 1% said.
We don’t know how a giant gas-powered spacecraft and an extrasolar system formed; Since there is nothing like this in the solar system, this indicates that the formation process is different from that of the moons here.
It will take more work to find them; The revelation will also confirm whether or not it is exomona. At the very least, follow-up observations will be needed to see if another instrument can pick up the signal. But the only way to confirm the discovery of the outer moons is to discover many things that can no longer dispute their existence.
The group’s study was published in the journal natural astronomy.
Source: Scientific Warning