Sentences with phrase «of radiation pressure»

With the inclusion of radiation pressure, the 2017 models show how these two factors can create spirals like those also observed around the same star.

Christine Démoré, an engineering physicist at the University of Dundee in Scotland, and colleagues set out to reverse the direction of that radiation pressure, so that an object would get pulled rather than pushed.

Not exact matches

He made tornadoes, volcanoes, influenza, HIV, cancer, poisonous spiders, sharks, subzero temperatures, the crushing pressures on the surface of Venus, and cosmic radiation.

«Despite stronger solar wind and EUV - radiation levels under the early Sun, ion escape can not explain more than 0.006 bar of atmospheric pressure lost over the course of 3.9 billion years,» says Robin Ramstad.

Waves of light or sound fired at an object tend to bounce off its surface like raindrops on an umbrella, collectively exerting a subtle nudge called radiation pressure that pushes the object away.

Manufactured in bulk, low - cost Sprites could be deployed and networked by the hundreds or thousands to create space - based sensor arrays of unprecedented breadth, with each craft so lightweight that it could operate without propellant, shifting or maintaining its orbit solely through the radiation pressure of starlight or the forces imparted by a planet's magnetic field.

The X-ray data also indicates that radiation from material surrounding this black hole has consistently surpassed the so - called Eddington limit, defined by a balance between the outward pressure of radiation from the hot gas and the inward pull of the gravity of the black hole.

In this process, massive stars formed early in the life of a galaxy shine so brightly that the pressure of their radiation pushes lots of gas and dust out of the galaxy altogether.

Having a mass of only less than seven per cent of the mass of the Sun, they are unable to create sufficient pressure and heat in their interiors to ignite hydrogen - to - helium fusion, a fundamental physical mechanism by which stars generate radiation.

By coupling a nanostring to an optical waveguide, Kippenberg's lab recently demonstrated the ability to «hear» the gentle sound of photons flowing in a laser beam (each imparting a tiny radiation pressure force to the string).

The creatures can survive intense pressures, huge doses of radiation, and years of being dried out.

Vinković's model «shows how dust grains propelled by radiation pressure can travel from the disk's hottest regions to its icy outer edges,» says astronomer Dániel Apai of the Space Telescope Science Institute in Baltimore, Maryland.

The collapse creates so much heat and pressure that the star forges the heaviest elements known and blasts them and most of its outer layers back out into space, along with blinding radiation.

Sandia's Z machine uses magnetic fields and electrical currents to mimic the temperatures, pressures and radiation of a nuclear blast.

Results from recent clinical trials and studies in animals suggest that a class of anti-cancer drugs called angiogenesis inhibitors may be able to temporarily reduce interstitial pressure and improve the efficacy of chemotherapy and radiation treatments.

After conversations with radiation oncologists with whom he collaborates, Ziaie decided to take on the challenge of creating a tumor pressure sensor.

Because radiation therapy requires the presence of oxygen to be effective, tumors with high interstitial pressure are often less receptive to radiation therapy.

The interstitial pressure inside a tumor is often remarkably high compared to normal tissues and is thought to impede the delivery of chemotherapeutic agents as well as decrease the effectiveness of radiation therapy.

Even the crushing pressure of deep seas, the vacuum of outer space and exposure to extreme radiation don't bother water bears.

New work from Carnegie scientists using intense infrared radiation shines new light on this fundamental material at extreme pressures and reveals the details of a surprising new form of solid hydrogen.

Water bears, or tardigrades, have been recorded surviving the vacuum of space, high doses of radiation and pressure.

Now, Hippke and Heller show that a combination of the stars» gravity and radiation pressure from their photons can bring the craft into a stable orbit around one of the stars, then around the tantalising planet (Astrophysical Journal Letters, doi.org/bx8t).

Ehrenreich and his team think that such a huge cloud of gas can exist around this planet because the cloud is not rapidly heated and swept away by the radiation pressure from the relatively cool red dwarf star.

Although ultraviolet (UV) solar radiation contributes to the development of sun erythema, cancer and aging of the skin, it also reduces blood pressure, synthesises vitamin D and improves the treatment of several diseases.

The birds are a textbook example of adaptive radiation, in which a single ancestor responds to a selective pressure — in this case, food availability — by diversifying into several species.

The researchers modeled how radiation pressure and PeI work together to affect the movement of dust and gas.

But the radiation fron the air above the surface is fixed by the pressure of the air which remains fairly constant at around one atmosphere.

HPCAT was established to advance cutting - edge, multidisciplinary, high - pressure science and technology using synchrotron radiation at Sector 16 of the Advanced Photon Source (APS) of ANL.

The cloud forms a comet - like tail as a result of the starlight's radiation pressure pushing on the escaped hydrogen.

Good arguments exist that the central regions should collapse first, producing a condensed protostar whose contraction is halted by the large buildup of thermal pressure when radiation can no longer escape from the interior to keep the (now opaque) body relatively cool.

Due to the faintness of the red dwarf, its radiation pressure is insufficient to stop a sail craft flying at 20 % of the speed of light before it collides with its surface.

We propose to use the radiation pressure of the star's light to slow down the probe, symmetrically to its initial acceleration using laser light.

He especially enjoys research focused on the study of matter at extreme conditions of high pressure, high temperature, and high radiation flux.

In addition to the radiation pressure, the winds that so massive a star generates disperse its natal cloud, further limiting its growth as well as interfering with the formation of nearby stars.»

The Sun's radiation pressure and solar wind accelerate materials away from the comet's head at differing velocities according to the size and mass of the materials.

«Once a protostar reaches a threshold of about 20 solar masses, the pressure exerted by its radiation should overpower gravity and prevent it from growing any bigger.

There could be three evolutionary processes could explain this adaptive radiation of hominins: 1) the occupation of novel niches for species living in a highly productive but spatially constrained region when there are deep fresh water lakes in the EARS [46] and 2) the lakes themselves creating spatial structure producing population isolation and vicariance and 3) repeated periods of increased resource availability stimulated adaptation and radiation followed by periods of environmental stress when the lakes rapidly dried up imposing strong selection pressures [28].

Is star formation triggered mainly by shockwaves from exploding stars, or the pressure created by radiation and stellar winds from massive stars — or can those processes get in the way of the collapse?

In 2010, model simulations of rocky super-Earths between two and 10 Earth - masses indicated that high pressures could keep their cores solid instead of molten, which would prevent a protective magnetic field from forming protecting developing surface life from stellar radiation.

When sunlight from the Sun hits these solar panels, the photons exert a small but significant amount of force (radiation pressure).

«Optomechanics is an area of research in which extremely minute forces exerted by light (for example: radiation pressure, gradient force, electrostriction) are used to generate and control high - frequency mechanical vibrations of microscale and nanoscale devices,» explained Gaurav Bahl, an assistant professor of mechanical science and engineering at Illinois.

Chlorella has been shown to help support healthy hormonal function and good cardiovascular health, fight against the effects of chemotherapy and radiation, help lower blood pressure and bad cholesterol, and excel in removing harmful toxins from your body.

As a result, computing the transfer of infrared radiation throughout the atmosphere, with variations in pressure, temperature and concentration of each gas type, is a challenging problem that was not well understood until the 1950s.

The basic ingredients are easy to list: — absorption / emission properties (or spectroscopic parameters) of CO2 at atmospheric pressures, i.e. data presently available from HITRAN - database combined with models of line broadening — observed properties of the atmosphere where most important features include clouds and moisture content, but many other factors have some influence — computer model of the transmission of radiation along the lines of MODTRAN or GENLN2

In his 2007 paper, Miskolczi (still screwed up on Kirchhoff's Law) goes overboard with his misunderstanding of the virial theorem, radiation pressure (he left out the light speed «c» factor), and hydrostatic equilibrium.

It involves the effects of numerous overlapping gravity fields, not entirely predictable drag, solar wind, radiation pressure, relativistic effects, etc, etc, etc..

The force of pressure encloses our atmosphere, no matter what extreme radiation affirmations dopes like you make.

By Amber Bentley (Aged 11) In just 16 pages, this wonderful book covers the structure of the atmosphere, solar radiation, the water cycle, clouds, fronts, convection, air pressure, air masses, the global atmospheric circulation, making weather observations, forecasting, synoptic charts, hurricanes, regional climate, palaeoclimates and anthropogenic climate change.

For the adiabatic process the formula considers the partial pressures and specific heats of the gases forming the atmosphere, an adiabatic constant and corrective coefficients for the heating caused by water condensation in the wet atmosphere and for the absorption of infrared radiation by the atmosphere.

The advantages are said to be: 1) the pressure drop caused by the mesh spreads the airflow evenly over the full surface of the absorber, and 2) the first layer of mesh acts as a radiation shield to reduce the radiation from the hotter inner layers toward the glazing.