Sentences with phrase «of ionised»

Dr Shannon explained that the vast spaces between objects in the Universe contain nearly invisible gas and a plasma of ionised particles that used to be almost impossible to map, until this pulse was detected.

The second method is to plot the giant HII regions (bright nebulae of ionised hydrogen) which are usually formed in the spiral arms.

This star - forming region of ionised hydrogen gas is in the Large Magellanic Cloud, a small galaxy which neighbours the Milky Way.

Physicists working with plasma jets, made of a stream of ionised matter, have just discovered a new phenomenon.

These enter the clay tube, causing the water there to evaporate and a luminous plasma ball — consisting of ionised water molecules — to rise from the surface.

These accelerators work by shooting pulses of intense laser light into plasma to create a wave rippling through the cloud of ionised gas, leaving a wake of electrons akin to those that form behind a speedboat in water.

The contrasting faint reddish clouds that seem to weave between the stars are composed of ionised hydrogen gas.

Measurements of the space environment round it show that the water flowing out from the comet's nucleus forms a prominent atmosphere which interacts with the constant flow of ionised particles from the sun, the so - called solar wind.

The Lancaster team used the Subaru and Keck telescopes on Hawaii, and the Very Large Telescope in Chile to discover several galaxies which seem to have large bubbles of ionised gas around them, allowing light to pass through.

Now, Christopher Howk and Nicolas Lehner of the University of Notre Dame in Indiana have detected fast - moving clouds of ionised hydrogen in our galaxy.

The region of sky pictured is listed in the Sharpless catalogue of H II regions: interstellar clouds of ionised gas, rife with star formation.

The surrounding cloud of ionised gas is producing more microwaves than clouds around other star clusters in our galaxy.

During their lives, massive stars produce copious amounts of ionising radiation and kinetic energy through strong stellar winds.

Herschel 36 is the main source of ionising radiation for this part of the Lagoon Nebula.

This EU - funded programme links groups working on the response of stem cells to low doses of ionising radiation, such as found in medical imaging or nuclear accidents.

There is a lot of oxygen in comparison with the amount of ionising radiation available.

What is abundantly clear however is that life can not adapt to the mutagenic and teratogenic effects of ionising radiation.

Not exact matches

X-rays are classified as ionising radiation, which in case of improper use may be dangerous for persons and for their surroundings.

The daylight side of WASP - 12b is so hot that clouds can not form and alkali metals are ionised.

The light's wavelength can also change noticeably when photons are scattered off ionised gas moving through space, providing a way to probe the velocity of such gas.

This would create a layer of plasma from ionised gas, which would generate a thermonuclear shock wave that ripples through the fuel, promoting compression (Energy & Environmental Science, DOI: 10.1039 / b904609g).

The team analysed the effect of this energetic radiation on the pillars: a process known as photoevaporation, when gas is ionised and then disperses away.

This research was presented in a paper entitled «Connecting the dots: a correlation between ionising radiation and cloud mass - loss rate traced by optical integral field spectroscopy,» by A. F. McLeod et al., published in the Monthly Notices of the Royal Astronomical Society.

The idea that massive stars will have a considerable effect on their surroundings is not new: such stars are known to blast out vast quantities of powerful, ionising radiation — emission with enough energy to strip atoms of their orbiting electrons.

Biochemists have managed to synthesise 10 of them in experiments that simulate lifeless prebiotic environments, using proxies for lightning, ionising radiation from space, or hydrothermal vents to provide the necessary energy.

H II regions like RCW 106 are clouds of hydrogen gas that are being ionised by the intense starlight of scorching - hot, young stars, causing them to glow and display weird and wonderful shapes.

«But once the atom is ionised, the electrons don't just leave their atom like a train leaves a station, they still feel the electric field of the laser,» explains Jean - Pierre Wolf, a professor at the applied physics department of the UNIGE Faculty of Sciences.

The more intense a laser is, the easier should it be to ionise the atom — in other words, to tear the electrons away from the attracting electric field of their nucleus and free them into space.

This only ended when ultraviolet light from the first stars and giant black holes had once again ionised the fog of neutral atoms filling the universe.

Its ability to ionise air made it easy to detect and led to a surprising discovery: even when no radioactive source was present, detectors revealed the presence of some other radiation that was ionising the air.

As each flash is intense enough to completely ionise a neon atom and release an electron, the researchers could use those electrons like a flashgun, to illuminate some of the original 2.5 femtosecond trigger pulses of laser light.

Ionised clouds of gas have been found close enough to home to keep the galaxy ablaze.

Since the charge is concentrated over a small distance, it would create a strong electric field, perhaps enough to ionise the air and create a luminous discharge that travels up away from the ground — explaining the orbs, flames and aurora - like sheets of light.

But Hayabusa has been hobbling home without the full use of its four ion engines, which ionise xenon gas and then use electric fields to accelerate the ions, providing a steady — though weak — thrust.

But Kusenko says the reaction takes place much faster if one of the atoms is ionised.

Clouds of electrons created by ionised gas in the beam chamber and microscopic dust particles — playfully known as unidentified falling objects, or UFOs — are interrupting the beams and making it harder to get the LHC running consistently.

But when Ilsedore Cleeves at the University of Michigan and her team created a model of the early sun they found this couldn't have happened: once the ice was split, the oxygen became locked in frozen carbon monoxide and not enough ionised, deuterium - rich hydrogen was made.

In planetary nebulae, thought to be the evolved stage of pre-planetary nebula, the core is exposed and the hotter radiation it emits ionises the gas in the now weaker jets, which in turn glow.

They conclude that the fullerene cage acts as a captor for the electron, which is ionised inside the cage, when subjected to a laser pulse of the same intensity as the difference between the lower energy levels.

This cascade ionises the air, producing a conical shower of free electrons where a current might begin to flow.

Astronomers thought that ionised gas created by the first generation of stars might be mimicking the imprint of inflation by scattering the microwaves on their way to us from distant parts of the universe.

Kerie Hammerton of the Australian Nuclear Science and Technology Organisation argued that ionising radiation can usefully prevent spoilage and food - borne disease, and that many overseas studies suggest there are no safety issues.

BURPS of hot ionised gas from the sun can knock out satellites and power grids when they hit Earth (New Scientist, 21 March, p 31).

The early X-ray laser relied on one intense burst of energy to both ionise a metal foil and excite the ions so that they emit X-rays.

The distinctive blueish colour of this rather mysterious object is again created by radiation from the hot star — this time by ionising oxygen instead of hydrogen.

The object's light spectrum shows that its glow comes from oxygen that has been ionised — stripped of some of its electrons — along with other ionised elements, making its true hue a greenish colour.

He and his colleagues say the electrical potential of the device could be driven up further by improving how the gels repel the ionised atoms and by making the gel layers even thinner.

Radiation from hot young stars could account for ionised oxygen in the cloud, but not the ionised neon: neon doesn't shine in the ultraviolet, as seen in the cloud, without lots of X-rays hitting it.

It would take a huge amount of energy to ionise all this gas, but there was no hint of a source.

Curiosity will do this sort of elemental chemistry too, but in a more Jedi - like fashion: zapping rocks with a laser from up to 7 metres away and studying the spectrum of light emitted by the ionised rock vapour.