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Universe's biggest stars form in the densest gas clouds
tabsey
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2-28-2008 5:09 AM
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space
tabsey
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Looks at the variations in the size of stars.
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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/a4c79a16-d649-4b48-9b11-91dedc1d3126/426D94D4-B224-4A13-B7F3-5CDEB308E3B9/" 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/article/dn13387-universes-biggest-stars-form-in-the-densest-gas-clouds.html?feedId=online-news_rss20" href="http://space.newscientist.com/article/dn13387-universes-biggest-stars-form-in-the-densest-gas-clouds.html?feedId=online-news_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/article/dn13387-universes-biggest-stars-form-in-the-densest-gas-clouds.html?feedId=online-news_rss20"><div align="center"><img src="http://content9.clipmarks.com/blog_cache/space.newscientist.com/img/F498118B-3AEC-49E6-A21C-032ACE621368" alt="A massive star forms at the centre of a gas cloud heated by proto-stars (Illustration: Mark Krumholz)" /></div></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/article/dn13387-universes-biggest-stars-form-in-the-densest-gas-clouds.html?feedId=online-news_rss20"><DIV class="straptext">A massive star forms at the centre of a gas cloud heated by proto-stars (Illustration: Mark Krumholz)</DIV></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/article/dn13387-universes-biggest-stars-form-in-the-densest-gas-clouds.html?feedId=online-news_rss20"><P>What is the magic "X factor" that determines which stars become the biggest and brightest in the universe? The answer, new calculations suggest, is how dense their parent gas clouds are. Denser clouds heat up more evenly, preventing the clouds from fragmenting into lots of tiny stars and allowing one or two big stars to form instead.</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/article/dn13387-universes-biggest-stars-form-in-the-densest-gas-clouds.html?feedId=online-news_rss20"><P>The research suggests astronomers may be underestimating the number of small- to medium-sized stars in the universe.</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/article/dn13387-universes-biggest-stars-form-in-the-densest-gas-clouds.html?feedId=online-news_rss20"><P>Astronomers believe stars condense from cold clouds of gas in space. But it has been unclear why the vast majority of stars grow no more massive than the Sun, while some balloon to more than 100 solar masses.</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/article/dn13387-universes-biggest-stars-form-in-the-densest-gas-clouds.html?feedId=online-news_rss20"><P>"Why would a massive cloud collapse monolithically to form one big star instead of fragmenting to make lots of little ones?" asks Mark Krumholz of Princeton University in New Jersey, US.</P></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;"> </td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/426D94D4-B224-4A13-B7F3-5CDEB308E3B9/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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