Sentences with phrase «of galactic wind»

Furthermore, the team can zoom in on parts of the simulation to study phases and properties of galactic wind in isolation.

Expanding the size of the simulation will allow the team to test an alternate theory for the emergence of galactic wind in disk galaxies like M82.

Specifically, UC Santa Cruz astrophysicist Brant Robertson and University of Arizona graduate student Evan Schneider (now a Hubble Fellow at Princeton University), scaled up their Cholla hydrodynamics code on the OLCF's Cray XK7 Titan supercomputer to create highly detailed simulations of galactic wind.

Not exact matches

Many other potential applications of this dataset are explored in the series of papers, and they include studying the role of faint galaxies during cosmic reionisation (starting just 380,000 years after the Big Bang), galaxy merger rates when the Universe was young, galactic winds, star formation as well as mapping the motions of stars in the early Universe.

It's possible that this relatively light galaxy has too little mass — or gravitational pull — to retain the metals, and that a rush of gas called a galactic wind swept them away.

THE discovery of powerful galactic «winds», blowing outwards from distant galaxies, could solve a mystery which has long baffled astronomers: why elements heavier than helium are found in the space between galaxies.

Mike Dopita and his colleagues at the Australian National University in Canberra, working with a team led by Zlatan Tsvetanov of Johns Hopkins University in Baltimore, believe that galactic winds provide the answer.

To better understand how galactic wind affects star formation in galaxies, a two - person team led by the University of California, Santa Cruz, turned to high - performance computing at the Oak Ridge Leadership Computing Facility (OLCF), a US Department of Energy (DOE) Office of Science User Facility located at DOE's Oak Ridge National Laboratory (ORNL).

These outflows are driven by the life and death of stars, specifically stellar winds and supernova explosions, which collectively give rise to a phenomenon known as «galactic wind.»

New stars are springing into life within the bright, colorful «head» of NGC 4861 and ejecting streams of high - speed particles as they do so, which flood outwards to join the wider galactic wind.

These galactic winds can be powered by the ongoing process of star formation, which involves huge amounts of energy.

This star - making frenzy gives rise to galactic wind that pushes out more gas than the system keeps in, leading astronomers to estimate that M82 will run out of fuel in just 8 million years.

«The process of generating galactic winds is something that requires exquisite resolution over a large volume to understand — much better resolution than other cosmological simulations that model populations of galaxies,» Robertson said.

Previously, astronomers have used x-ray telescopes to observe strong winds very near the massive black holes at galactic centers (artist's concept, inset) and infrared wavelengths to detect the vast outflows of cool gas (bluish haze in artist's concept, main image) from such galaxies as a whole, but they've never done so in the same galaxy.

Some galaxies drive galactic winds, expelling dust and gas at hundreds of kilometers per second into the intergalactic medium, the space between galaxies.

The simulations show that supernova explosions eject copious amounts of gas from galaxies, which causes atoms to be transported from one galaxy to another via powerful galactic winds.

They found previously unseen reservoirs of cold gas rocked by turbulence from the galactic winds.

«By driving turbulence in the reservoirs, these galactic winds extend the starburst phase instead of quenching it,» says Edith Falgarone at the Paris Observatory.

The team determined that galactic winds alone could not replenish the newly revealed gaseous reservoirs and suggests that the mass is provided by galactic mergers or accretion from hidden streams of gas, as predicted by current theory.

It could easily have been caused by a supernova punching through the top and bottom of the galactic disk, the intense stellar winds from 10 or so hot stars, a powerful gamma - ray burst, or even a large star moving through the area.

A reduction of the solar wind during a prolonged solar minimum event would cause more galactic cosmic rays to enter the earth's atmosphere which would promote more aerosol formation thus more cloud nucleation.

During periods of low activity, the solar wind is unable to repel as many galactic cosmic rays from the Earth's atmosphere.

We propose that the cycle may be caused by modulation of cosmic ray (CR) flux by the Solar system vertical oscillation (64 My period) in the galaxy, the galactic north - south anisotropy of CR production in the galactic halo / wind / termination shock (due to the galactic motion toward the Virgo cluster), and the shielding by galactic magnetic fields.

Cosmogenic isotopes, which are produced by galactic cosmic rays impacting on meteoroids and whose production rate is modulated by the varying HMF convected outward by the solar wind, may offer an alternative tool for the investigation of the HMF in the past centuries.

And noting «zonal mean - winds constitute an important element of global atmospheric circulation,» they go on to suggest,» if the solar cycle can influence zonal mean - winds, then it may affect other features of global climate as well, including oscillations such as the NAO and MJO, of which zonal winds are an ingredient» Thus, «the cause of this forcing» as they describe it, «likely involves some combination of solar wind, galactic cosmic rays, ionosphere - Earth currents and cloud microphysics.»

Solar cycles of magnetic variability result in changes in the luminal spectra of the sun, the properties of the solar wind, and the flux of galactic cosmic rays incident on Earth's atmosphere.

The solar wind, by modulating the galactic cosmic rays which reach the earth, determines both the formation of clouds and the carbon dioxide level in the earth's atmosphere — which has nothing to do with emissions from factories or automobiles.