Sentences with phrase «background quasar»

As light from background quasars passes through the gas and dust in foreground galaxies and cosmic filaments, it carries information about speed, composition and temperature of the intervening space.

The primordial infalling gas resides a mere 190,000 light - years from the galaxy — relatively nearby on galactic length - scales — and is revealed in silhouette in the absorption spectrum of the more distant background quasar QSO J1444535 +291905.

The galaxies were initially found by the absorption of background quasar light passing through the galaxies.

Image of the gravitational lens RX J1131 - 1231 galaxy with the lens galaxy at the center and four lensed background quasars.

It is possible to see two or more identical images of the same background quasar.

In some cases the light from background quasars or galaxies can be warped to form rings.

A stream of primordial inflowing gas is illuminated from behind by a distant background quasar (lower left; quasar added by an artist, along with the starry background).

With its close proximity to Earth and its correspondingly large footprint on the sky, Andromeda provides a far more extensive sampling of a lot of background quasars.

Jackson and colleagues used the Karl G. Jansky Very Large Array, in New Mexico, US, to study four examples of gravitational lens systems where the background quasar appears in a ring of four, distorted images.

The background quasars are each roughly 12.5 billion light - years from Earth.

Artist impression of a progenitor of Milky Way - like galaxy in the early universe with a background quasar shinning through a «super halo» of hydrogen gas surrounding the galaxy.

«We had expected we would see faint emissions right on top of the quasar, and instead we saw strong bright carbon emission from the galaxies at large separations from their background quasars,» said J. Xavier Prochaska, professor of astronomy and astrophysics at UC Santa Cruz and coauthor of the paper.

This technique, however, normally prevents astronomers from seeing the actual light emitted by the galaxy, which is overwhelmed by the much brighter emission from the background quasar.

From our perspective on Earth, there will be rare cases where a distant background quasar and a stream of primordial gas near a foreground galaxy are exactly aligned on the night sky.

The Einstein Cross (Q2237 +0305) is formed by a foreground galaxy lensing the light from a background quasar into 4 images.

«The polarization of the waves coming from the background quasar, combined with the fact that the waves producing the two lensed images traveled through different parts of the intervening galaxy, allowed us to learn some important facts about the galaxy's magnetic field,» said Sui Ann Mao, Minerva Research Group Leader for the Max Planck Institute for Radio Astronomy in Bonn, Germany.