Sentences with phrase «abundance of elements»

Seven years later solar mass fractionation was revealed [«Solar abundance of the elements», Meteoritics 18 (1983) 209 - 222].

In 1983 we predicted in a peer - reviewed paper that the Galileo Mission would find excess Xe - 136 in Jupiter [«Solar abundance of the elements», Meteoritics 18, 209 - 222 (1983)-RSB-.

On July 21, 2003, some astronomers provided evidence from recent discoveries of giant extrasolar planets in mostly inner orbits around host stars that planetary systems may be more common around stars whose spectra show an enriched abundance of elements heavier than hydrogen and helium — also called high «metallicity» (exoplanets.org press release; and Gonzalez, 1999).

The star may have only around 81 percent of Sol's abundance of elements heavier than hydrogen — «metallicity» (Ansgar Reiners, 2007, from Jenkins et al, 2009).

Lacaille 9352 may have 50 to 58 of Sol's mass (Demory et al, 2009, Table 4; RECONS; and NASA Star and Exoplanet Database, interpolation table of Henry and McCarthy, 1993), less than half (43 to 46 percent) of its diameter (Demory et al, 2009, Table 4; and NASA Star and Exoplanet Database, derived from the power law formula of Kenneth R. Lang, 1980), 1.1 percent of its visual luminosity and 3.5 percent of its bolometric luminosity (NASA Star and Exoplanet Database, derived from the exponential formula of Kenneth R. Lang, 1980), and only about one tenth to 60 percent of Sol's abundance of elements heavier than hydrogen («metallicity»)(Demory et al, 2009, Table 4).

Given the low abundance of elements heavier than hydrogen, moreover, it is possible that the star is more likely to have gas giants in cold outer orbits.

HE 0107 - 5240 has the lowest, known abundance of elements heavier than hydrogen and helium of stars in the Milky Way Galaxy that have thus far been measured for «metallicity» (more).

As an example, there are stars that have a very low abundance of elements with higher atomic numbers than helium — known as metal - poor stars — that lie just below the main sequence.

Astrophysicists keenly study supernovae not only to understand the mechanics of stars, but also to learn more about the abundance of elements in the cosmos, the heavier varieties of which are created by these uncommon events.

The relative abundance of those elements can help researchers pinpoint where the planet formed.

The relative abundance of elements in the galaxy therefore depends partly upon the stability of these intermediate exotic versions.

In Earth's solar system, more massive planets have a lower abundance of elements heavier than hydrogen and helium.

Perhaps the most fundamental is an abundance of elements that can be easily boiled out of hot rock.

They saw that the star has a high abundance of elements with even atomic numbers compared with odd ones.

That's because, on top of bringing water, they are also believed to have delivered much of Earth's so - called volatile elements, namely, carbon, nitrogen, and noble gases, says Conel Alexander, a cosmochemist at the Carnegie Institution for Science in Washington, D.C. To explain the abundance of these elements, there would have had to have been enough impacts to also deliver Earth's water, he says.

Of the stars, 14 had the same abundance of elements — such as sodium, magnesium, zirconium, barium — as Omega Centauri, the galaxy's most luminous globular cluster.

Of the stars, 14 had the same abundance of elements as Omega Centauri, the galaxy's most luminous globular cluster.

Metallicity & Giant Planets - A three - year spectroscopic survey of 12 stars orbited by giant planets shows that they have high abundances of elements heavier than helium, typically two to three times that of our sun, Sol.

c.) Was predicted in Jupiter's He - rich atmosphere in 1983 [«Solar abundances of the elements,» Meteoritics, vol.

Not exact matches

Cause really accretion and a nearby second generation star going supernova disturbing a dust cloud thus explaining our high abundance of higher elements seems like a very excellent explanation.

In his argument, Shai Linne said that White falsely teaches elements of the prosperity gospel, including that «physical healing and financial abundance in this life are provided for in the atonement of Christ.»

Later this correlation between righteousness and prosperity was to be democratized, and the magical element confined to the direct action of God; in the final versions of Deuteronomy, for example, the responsibility for righteousness is laid on all Israelites equally, and abundance is God's reward for this.

Not only do these ingredients add an element of surprise and pop of pretty colour to your platter, but they also happen to be available in abundance in the late summer ensuring you're likely to have them on hand.

The perfect indoor picnic has 3 main elements: a giant blanket to sprawl out on, an abundance of greenery, and a few pillows throw to cushion your booty.

«For more than 70 years,» explains García Rojas «we have known that the weak recombination lines of the ions of elements, such as oxygen and carbon, give us values for their abundances which are much bigger than those obtained using collision lines, even though the collision lines are 1,000 to 100,000 times brighter than the recombination lines.

There are basically two types of lines, those produced by collisions between the atoms or ions and the electrons in the surrounding gas, which are called collision lines, and which are very bright for elements such as oxygen, nitrogen and neon, and lines which are produced when ions capture free electrons, which are called recombination lines, and which are bright only for those gases with the highest abundances in the interstellar medium: hydrogen and helium.

Regolith X-ray Imaging Spectrometer (REXIS)-- A student experiment provided by the Massachusetts Institute of Technology (MIT) and Harvard University in Cambridge, which will observe the X-ray spectrum to identify chemical elements on Bennu's surface and their abundances.

In early 2013, a Canadian study showed that the presence of lower - frequency elements in a song could be used to predict, to a degree, the abundance of songbirds setting up shop near a road.

Kilonovas are predicted to form such elements in abundance, spraying them out into space where they could become part of future generations of stars and planets.

This surprise, combined with the water abundance allowed to infer the presence of large amount of heavier elements in the atmosphere.

By measuring the relative abundance of various elements in debris left over from nuclear explosions, researchers say they can accurately estimate the amount of energy released during the initial blast.

The rate at which massive stars form drops sharply as you venture outward from the Milky Way's center, and the abundance of heavy elements falls with them.

Cosmic forces determine the abundances of the terrestrial elements, the ultimate source of energy for the Earth is the Sun, and cosmic events over the ages have shaped the course of the evolution of the Solar System.

«The abundance of these toxic elements, which are now restricted or banned, reflects just how long the plastic has been in the lake.

One of the prime explanations for this low reflectivity — an abundance of minerals including the element iron, which strongly absorb certain wavelengths of light falling upon them — doesn't fit in this instance, researchers say.

A new analysis of data from NASA's Kepler spacecraft finds that stars with lower abundances of heavy elements — the kind that populated the early Milky Way — are more likely to host gas giants several thousand kilometers larger in diameter than Jupiter.

The low abundance indicated that all of the element could have been made in stars that do not explode, through nuclear reactions that don't involve neutrinos.

For any two stars at random, the abundances of their trace elements will slightly differ: one star may have a bit more iron, the other a bit more carbon, etc..

By increasing the abundance and distribution of elements like phosphorus, plants grow faster, meaning large herbivores are responsible for producing their own food and contributing to their lush habitats.

The spectra indicate that they all have less than one - tenth of the abundance of heavy elements that the Sun has, but the spectra are too crude to determine whether these abundances are identical.

Jupiter, 18 times as massive as Neptune, has only five times the solar abundance of heavy elements.

Neptune's abundance of heavy elements is 100 times that of the sun.

The team — also including Heather Jacobson and Anna Frebel of the Massachusetts Institute of Technology, as well as former Carnegie postdoc Josh Adams — studied five stars in Sculptor, measuring the abundance of 15 elements in each one.

But if the abundances of heavy elements in atmospheres of exoplanets in other systems resemble the abundances for planets of similar mass closer to home, then those exoplanets were probably created in similar ways.

Three observational «pillars» drive most cosmologists towards the big bang: the expansion of the Universe, the existence and character of the microwave background radiation, and the primordial abundances of the light elements.

In the new paper, researchers analyzed the same black shales for the relative abundance of an additional element: osmium.

Because oxygen is heavier than helium — which astronomers consider the cut - off for so - called heavy elements — and water has oxygen in it, the researchers could use the water signal to determine the abundance of heavy elements in the atmosphere of HAT - P - 26b.

The nuclear reactions that result from this gas mixing produce a large supply of neutrons that are captured by the nuclei of heavy elements such as iron to make Sr and Y. Chiappini and her colleagues found that the best way to explain the pattern of abundances they had observed was to apply a stellar model involving a spinning velocity of 500 kilometers per second at the surface.

«Hoyle's equation,» as Clayton calls it, relates the mass of heavy elements ejected by dying stars to the rate of their death and the change in abundance of the various isotopes produced during successive nuclear reactions.

Studying the spectra of the stars, the researchers found unexpectedly high abundances of the heavy elements strontium (Sr) and yttrium (Y).