'Super-Earths' May Lack a Magnetic Field -Exist as Dead Zones
Galaxy Superclusters Trace the Distribution of Dark Matter (A 2010 Great Discovery)

Sculptor Wall of Galaxies-The Clue to the Missing Matter of the Nearby Universe

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In May of 2010, Astronomers using NASA's Chandra X-ray Observatory and ESA's XMM-Newton detected a vast reservoir of gas lying along a wall-shaped structure of galaxies about 400 million light years from Earth. In the image above the spiral and elliptical galaxies are shown in the Sculptor Wall along with the newly detected intergalactic gas, part of the so-called Warm Hot Intergalactic Medium (WHIM), shown in blue. This discovery is the strongest evidence yet that the "missing matter" in the nearby Universe is located in an enormous web of hot, diffuse gas.

The Sculptor Wall, a type of galaxy filament, the largest known structures in the universe, is a wall-shaped structure of galaxies about 400 million light years  from Earth. The wall is faint beyond 500 million light years because the data is incomplete beyond that distance. The nearest part of the wall (the Phoenix supercluster) lies next to a large rectangular void, the Sculptor Void -one of the largest voids in the nearby universe.

The X-ray emission from WHIM in this wall is too faint to be detected, so instead a search was made for absorption of light from a bright background source by the WHIM, using deep observations with Chandra and XMM.

This background source is a rapidly growing supermassive black hole located far beyond the wall at a distance of about two billion light years. This is shown in the illustration as a star-like source, with light traveling through the Sculptor Wall towards the Earth. The relative location of the background source, the Sculptor Wall, and the Milky Way galaxy are shown in a separate plot, where the view instead looks down on the source and the Wall from above.

An X-ray spectrum of the background source is given in the inset, where the yellow points show the Chandra data and the red line shows the best model for the spectrum after including all of the Chandra and XMM data. The dip in X-rays towards the right side of the spectrum corresponds to absorption by oxygen atoms in the WHIM contained in the Sculptor Wall.

The characteristics of the absorption are consistent with the distance of the Sculptor Wall as well as the predicted temperature and density of the WHIM. This result gives scientists confidence that the WHIM will also be found in other large-scale structures.

This result supports predictions that about half of the normal matter in the local Universe is found in a web of hot, diffuse gas composed of the WHIM. Normal matter — which is different from dark matter -- is composed of the particles, such as protons and electrons, that are found on the Earth, in stars, gas, and so on.

A variety of measurements have provided a good estimate of the amount of this "normal matter" present when the Universe was only a few billion years old. However, an inventory of the nearby Universe has turned up only about half as much normal matter, an embarrassingly large shortfall. (read more)

Casey Kazan via ESA News

Source: Chandra X-ray Observatory for NASA by SAO
Credit: Illustration: NASA/CXC/M.Weiss; Spectrum: NASA/CXC/Univ. of California Irvine/T. Fang et al.

Comments

Taotao Fang saw vacuous filaments barely visible connecting along the line of sight a huge black hole with the WHIM along the Sculptor wall of galaxies. The WHIM accounts for MOST visible matter in the Universe, and is about 1 million degrees ! NO wonder so much missing extra gravity has been invented as phony dark matter particles to hold together galaxy shapes that are clearly EM forces noteably barred spiral galaxies made of magnetized dust and gas, not dark matter halos. The WHIM is denied recognition as strong proof that EM forces explain away dark matter and the obsolete big-bang model

OK this makes a lot of sense dude. Well done!

www.online-privacy.ie.tc

Great post. Posted an excerpt on orbit17.com - Thanks!

Even a cursory examination of the "image" in this article clearly shows copied and pasted "galaxies". Maybe the "image" was made to illustrate a point. But its quality implies a photo and, thus, reality.

Pictures like that is what i real like.I like the cosmos very much.Thanks for your post.keep it up.

Well done!I’m attempting to add your site’s Rss to my own feed reader but it’s certainly not working effectively, you could need to check it out to make sure its operating appropriately.

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