Author Topic: Lithium battery Stars  (Read 5641 times)

electrobleme

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Lithium battery Stars
« on: November 14, 2009, 20:32:05 »
Stars with planets have low levels of lithium - why?

The Sun and the Earth connect together in a large exchange of particles and energy every 8 minutes through Flux Transfer Events. There is likely to be a constant connection between us and the Sun involving more than FTE's. Mercury has an active connection to the Sun. Remember that magnetics fields require a flow of charged particles, an electric current.  All the planets will be found to connect to the Sun in the future. All Stars will connect with other Stars  and local systems and galaxies.

The reason for the connection is an exchange of energy and particles, like a circuit. It is hard to work out why Stars with planets should have lower lithium than Stars without. Unless it is part of the electrical circuit in an Electric Universe.

It seems ironic that on Earth we use Lithium batteries yet it will never occur to mainstream science that the Sun and nature may have got there first and could use Lithium as part of its circuit.

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Shedding Light on the Sun's "Lithium Mystery"

For decades, astronomers have known our Sun contains a low amount of lithium, while other solar-like stars actually have more. But they didn't know why. By looking at stars similar to the Sun to study this anomaly, scientists have now discovered of a trend: the majority of stars hosting planets possess less than 1% of the amount of lithium shown by most of the other stars. “The explanation of this 60 year-long puzzle is for us rather simple,” said Garik Israelian, lead author on a paper appearing in this week's edition of Nature. “The Sun lacks lithium because it has planets.”

This finding sheds light not only on the lack of lithium in our star, but also provides astronomers with a very efficient way of finding stars with planetary systems.

Isrealian and his team took a census of 500 stars, 70 of which are known to host planets, and in particular looked at Sun-like stars, almost a quarter of the whole sample. Using ESO’s HARPS spectrograph, a team of astronomers has found that Sun-like stars that host planets have destroyed their lithium much more efficiently than “planet-free” stars.

“For almost 10 years we have tried to find out what distinguishes stars with planetary systems from their barren cousins,” Israelian said. "We now have found that the amount of lithium in Sun-like stars depends on whether or not they have planets.”

These stars have been "very efficient at destroying the lithium they inherited at birth,” said team member Nuno Santos. “Using our unique, large sample, we can also prove that the reason for this lithium reduction is not related to any other property of the star, such as its age.”

Unlike most other elements lighter than iron, the light nuclei of lithium, beryllium and boron are not produced in significant amounts in stars. Instead, it is thought that lithium, composed of just three protons and four neutrons, was mainly produced just after the Big Bang, 13.7 billion years ago. Most stars will thus have the same amount of lithium, unless this element has been destroyed inside the star.

This result also provides the astronomers with a new, cost-effective way to search for planetary systems: by checking the amount of lithium present in a star astronomers can decide which stars are worthy of further significant observing efforts.

Now that a link between the presence of planets and curiously low levels of lithium has been established, the physical mechanism behind it has to be investigated. “There are several ways in which a planet can disturb the internal motions of matter in its host star, thereby rearrange the distribution of the various chemical elements and possibly cause the destruction of lithium," said co-author Michael Mayor. " It is now up to the theoreticians to figure out which one is the most likely to happen.”
Shedding Light on the Sun's "Lithium Mystery" - universetoday.com


The introduction to the research paper says this...

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Enhanced lithium depletion in Sun-like stars with orbiting planets

The surface abundance of lithium on the Sun is 140 times less than protosolar1, yet the temperature at the base of the surface convective zone is not hot enough to burn Li. A large range of Li abundances in solar type stars of the same age, mass and metallicity is observed, but theoretically difficult to understand.

An earlier suggestion that Li is more depleted in stars with planets was weakened by the lack of a proper comparison sample of stars without detected planets. Here we report Li abundances for an unbiased sample of solar-analogue stars with and without detected planets. We find that the planet-bearing stars have less than 1 per cent of the primordial Li abundance, while about 50 per cent of the solar analogues without detected planets have on average 10 times more Li. The presence of planets may increase the amount of mixing and deepen the convective zone to such an extent that the Li can be burned.
Enhanced lithium depletion in Sun-like stars with orbiting planets (pdf)

« Last Edit: November 14, 2009, 20:44:12 by electrobleme »