Dark matter theories vie to explain odd radiation

invictus

3-12-2008 7:24 PM

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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://www.clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/a4b0e036-c337-4e11-99ac-afcfdec78d66/1FEE8CB7-A68D-4102-BCB8-8C86F1A254FA/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://space.newscientist.com/channel/astronomy/cosmology/mg19726474.100-dark-matter-theories-vie-to-explain-odd-radiation.html?feedId=cosmology_rss20" href="http://space.newscientist.com/channel/astronomy/cosmology/mg19726474.100-dark-matter-theories-vie-to-explain-odd-radiation.html?feedId=cosmology_rss20" style="font-size: 11px;">space.newscientist.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://space.newscientist.com/channel/astronomy/cosmology/mg19726474.100-dark-matter-theories-vie-to-explain-odd-radiation.html?feedId=cosmology_rss20"><P>TWO mysterious streams of radiation are emanating from the heart of our galaxy, and dark matter could explain them both. The question is: what kind of dark matter? </P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://space.newscientist.com/channel/astronomy/cosmology/mg19726474.100-dark-matter-theories-vie-to-explain-odd-radiation.html?feedId=cosmology_rss20"><P>In 2003, data from the Wilkinson Microwave Anisotropy Probe (WMAP) revealed a "haze" of unexplained microwave radiation at the centre of the Milky Way. A year earlier, the satellite INTEGRAL found an unusual stream of gamma rays coming from the same region. </P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://space.newscientist.com/channel/astronomy/cosmology/mg19726474.100-dark-matter-theories-vie-to-explain-odd-radiation.html?feedId=cosmology_rss20"><P>Various theories have attempted to explain these anomalies. Now two groups have come up with different explanations of how dark matter, the stuff thought to make up most of the universe's mass, could be behind them both. </P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://space.newscientist.com/channel/astronomy/cosmology/mg19726474.100-dark-matter-theories-vie-to-explain-odd-radiation.html?feedId=cosmology_rss20">Michael Forbes at the University of Washington in Seattle and Ariel Zhitnitsky of the University of British Columbia in Vancouver, Canada, have come up with the idea that hypothetical dark-matter "nuggets", concentrated at the galactic centre, are responsible.</blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/1FEE8CB7-A68D-4102-BCB8-8C86F1A254FA/blog/" title="blog or email this clip"><img src="http://content6.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

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