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.
While NGC 4861 would be a perfect candidate to study such winds, recent studies did not find
any galactic winds in it.
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.
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).
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.
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.
«By driving turbulence
in the reservoirs, these
galactic winds extend the starburst phase instead of quenching it,» says Edith Falgarone at the Paris Observatory.
Once Ulysses was
in its scheduled orbit, it began observing the solar
wind and magnetic field strength at high solar latitudes, finding that the solar
wind from high latitudes was moving at about 750 km / s (slower than expected), and that there were large magnetic waves emerging from high latitudes which scattered
galactic cosmic rays.
If Svensmark and other researchers are correct the switch between these states could be due to weakness
in the solar
wind leading to more
galactic cosmic rays entering the atmosphere and increasing the nucleation for cloud droplets (just as
in a «cloud chamber»).
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.
It's also changes
in the solar
wind and interplanetary magnetic field, which cycles along with energy output and shields the earth from
galactic cosmic rays.
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.