Sentences with phrase «equation of state»

The result also rules out some of the stiffer equations of state because stiffer matter tends to support larger masses without collapsing.
Equation of state of iron under core conditions of large rocky exoplanets.
Ab initio equations of state for hydrogen (H - REOS.3) and helium (He - REOS.3) and their implications for the interior of brown dwarfs.
Confronting the Dark Energy Equation of State with the Fundamental Constant μ, the Proton to Electron Mass Ratio Rodger I. Thompson 2013 July 15, 13:30 IA / U.
GW170817: Joint constraint on the neutron star equation of state from multimessenger observations.
Militzer, B. & Hubbard, W. B. Ab initio equation of state for hydrogen - helium mixtures with recalibration of the giant - planet mass - radius relation.
The thermodynamic regime on Venus is accessible to experiment, though, and Venus modellers use various empirical equations of state that are reasonably well validated.
«The systematic data sets can constrain both the release equation of state (EOS) and thermal conductivity.»
The associated operations to these processes require high quality data that is not always easy to access experimentally or via equations of state.
Miguel, Y., Guillot, T. & Fayon, L. Jupiter internal structure: the effect of different equations of state.
Our peak pressures are comparable to those predicted at the centre of a terrestrial - type exoplanet of three to four Earth masses3, representing the first absolute equation of state measurements for iron at such conditions.
The simplicity I am referring to here is «emergent», roughly analogous to that of a macroscopic equation of state that emerges, in the thermodynamic limit, from exceedingly complex molecular dynamics.
Measuring the equation of state of dark energy is one of the biggest efforts in observational cosmology today.
More specifically, it was necessary to realise that if represented with a proper normalisation, the data behaves in a universal manner, that is, in a way that is essentially independent of the equation of state.
Determining this value from first principles is difficult because it depends on the equation of state of the matter composing the star and this is still essentially unknown.
This simplifies calculations tremendously because it makes them independent of the equation of state.
The Hubble observations were made with Hubble's sharp - eyed Wide Field Camera 3 (WFC3), and were conducted by the Supernova H0 for the Equation of State (SH0ES) team, which works to refine the accuracy of the Hubble constant to a precision that allows for a better understanding of the universe's behavior.
This extreme substance is so dense that a teaspoonful of it would have a mass of around a billion metric tons, and scientists don't fully understand how it responds when squeezed, a property known as its «equation of state
This property, known as the equation of state, determines the radius of a neutron star of a particular mass.
Such unusual matter would tend to make neutron stars softer, so pinning down the equation of state with additional neutron star crashes could eventually resolve whether these exotic beasts of physics indeed lurk in this unexplored territory.
But exacting measurements of these properties — the so - called «equation of state» involved as matter changes from one phase to another in these collisions — have proven challenging.
Wang added, «With this type of machine learning, we are trying to identify a certain pattern or correlation of patterns that is a unique signature of the equation of state
«In the nuclear physics community, the holy grail is to see phase transitions in these high - energy interactions, and then determine the equation of state from the experimental data,» Wang said.
The key value involved in this scenario is the ratio between dark energy's pressure and density, what is called its equation of state parameter.
Instead, it provides a natural way for the equation of state parameter to fall below -1.
As Jay Melosh of the University of Arizona points out in commentary accompanying the report, computer limitations required Canup and Asphaug to use a primitive version of the equation of state in their calculations.
The internal structures of giant planets are much less well known than those of main - sequence stars because of uncertainties in the equation of state of degenerate gas, the composition (typically non-solar), the interaction with the magnetic field and, in the upper layers, the relative magnitudes of internal heat and energy deposited from the sun.
In the case of intrinsic defects in space - time (e.g., cosmic strings or walls), the production of new defects as the universe expands is mathematically similar to a cosmological constant, although the value of the equation of state for the defects depends on whether the defects are strings (one - dimensional) or walls (two - dimensional).
With this information, we will be able to calculate the Equation of State of the mysterious Dark Energy.
The goals of most observational studies of dark energy are to measure its equation of state (the ratio of its pressure to its energy density), variations in its properties, and the degree to which dark energy provides a complete description of gravitational physics.
An equation of state for low - mass stars and giant planets.
If we are going to work with Gibbs energy, we need to be careful to bound and define the systems, and to ensure that we understand the nature of the equations of state, e.g., kinked curves.
[«To understand the equation of state, assume that you have a fixed mass of air enclosed in a container with rigid walls (hence with fixed volume).
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