Category: Astronomy and Space

Microwave haze over the center of the galaxy: the mystery thickens

The existence of a mysterious haze of microwave radiation surrounding the galactic center and open space telescope WMAP in 2004, finally confirmed by observations of another probe — Telescope ESA Planck. True, the veil of secrecy over this halo is not only not cleared up, but, on the contrary, deepened even more.

Then, in 2004, on learning of the emission, the astronomers speculated that it was caused by dark matter, which is now considered to be concentrated in the centers of galaxies.

According to their hypothesis, it appeared that the dark matter particles annihilate, give rise to electrons and positrons, which are attracted by the magnetic field of the galaxy and begin to move around in a spiral and emit radio waves, which is seen as the part of the microwave haze hanging over the center. However, the very existence of the haze were doubts, considering it a ghost, the result of an error that occurred in the analysis of the telescope WMAP — the signal was too weak and could easily be "noise."

European telescope Planck, launched in May 2009, was much more perfect than WMAP, he could see the radio maps of the galaxy to see even more detail and what WMAP can not see at all. According to Krzysztof Gorski, the astronomer, the team's Planck, the telescope able to see the microwave haze with much higher resolution.

And he saw. However, analysis of the probe data and cross-checking other ways surprised researchers — microwave haze was not spherical, and highly elongated shape, whereas the dark matter halo can form, in the form of near-perfect ball.

So, most likely, dark matter has nothing to glow relationship.
Researchers particularly interested in the southern edge of the haze — it is too sharp to be a result of a permanent, long-term process, its origin is "sporadic", short, character, or region would always smoothed. Perhaps, scientists say, the haze had something to do with the so-called "Fermi bubbles", huge clouds of gamma radiation, located above the center of the Galaxy perpendicular to the plane of the disk. These "bubbles" were detected cosmic gamma-ray telescope "farm" in 2010. Their origin is also unclear, but the shape suggests a sporadic origin, as in the case of the mysterious microwave haze.

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