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2015-2-16 09:45|鿴:12870|:0|:С

ڵֲܷͼ

ڵֲܷͼ

ѧУһֳռġٶȵԲʽ˵ǵĹ۲ĽΪеһ֡׼ģУռ68.3%ܡ

ģͣѧһ־ȳռijܶȣͱһܶʱձ仯ĶѧԪغģռ䣩к㶨Ӱı泣С泣ϵȼڿռϱ仯ıѴ泣зΪ仯̫ˡ

ɡġ

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Ȼڵ֤ݶڼƲ⣬Ҫ֤֧֣

ңԶϵĹ۲⣬ʾݻ̵ĺξ˼͡

ʵʹ۲ƽ̹ģʾܶӦýƵըеٽܶȡͨʵĹ۲ԶԶҪжʹ

߶ܶȵĸҶְ֧ڵļ衣

Ŀǰͨ裬иͬԣܶȷdzСҲͨʷκγ֪֮໥ãţǿ໥ãַܶdz֮С10−29 g/cm3ϵʵӦֱӷΪӦóеռ䣬ռ68%ӰݻĿǰవۡ泣ۺͻۣ˰ҪʡȺ͸ѹ

ڰġѹ

ЧӦʱʵӰ죬Ҳܵʲ֮ͬӦӰ졣УѹǿʵӦһʽʵܶȡܶȺʵӦͬʵܶͬʱʡˣɹƵĸ-÷-޲ѷ-ֶ˶ȹУܿ㹻ǿĸѹݻӰ죺w<-1/3ʱѾͣѹʹͣѾֽʹֹͣ͡

üЧӦʱų⡱ѹɸ֮ųãȻ໥ġǣѹ棬ȴ汳ʱ屻ǵЧӦˡ

ڵľ۲֤

1998꣬ߺƳӹ۲鷢IaͳǵĹ۲ݣʾڼ֮͡1999꣬ѧƻƻ֤ʵ˸ý2011ŵ

IaͳǿɱΪ߶ȳȵı׼ߡֳDZʱľǵȶһֻҪ۲⵽ǵǵȣͿԲǵľ롣ٶȡ˿ԽͬIaͳǵĺѧ̵ԤֵбȽϡȡʵIJCDMģģͱȽϷϹ۲⡣

΢

Ǻʽİռ߶йס΢Ĺ۲⣬ԲĿǰʣԼаʺͨʵĺĿǰĹ۲ǣǵӽƽ̹Ӧýӽٽܶٽܶȡ΢氵ʺͨʵĺиֵ30%ңʣµΪ

ɭ΢̽WMAPǺʱ꣬ʵ72.8%ǰ22.7%Ϊʣͨռ4.5%2013꣬ʿǸǣ68.3%İ26.8%İʡ4.9%ͨʡ

߶Ƚṹ

桰ǰʣӣӣӵȣһȵġУеɳ̶̣һ·̾ͻᱻɢ䣬ֵڲ໥üǿȻֵҲȫȵģ΢Сܶ䡣ڰ磬ЩܶԴIJֺиİʣЩΧ俿ڵĵڲ໥÷dzǿڱܶȽϴĺĵĹУۼɾֲѹ˻Χһ֡𵴡ͬˮжһʯӣΧһȦһڰˣ֮໥ã˰ģγ˱IJֵһģԼΧѹϴ󲿷ֵһ״ܶȽϴǡ𵴡IJǰ״һš

֮ͣ¶½ȥγ˽΢Դͷɿ״Ӻ͵ʽԭӺˡʧȥ˹Ϊ໥õĴý飬֮໥ÿʼΪ״򡱲ܲĴɵԼɢ̶ֹͣס¶ȼǾȵģ¶½ijֵʱӻͻȻͬʱеġ״򡱶ͬʱ̶̶ֻ໥ãֻͣ⴫һ棬γн쿴ĸָӽṹЩ״ͣʣγɸϵй۲⵽ִСһµĿն~150ࣩնΧһȺϵɵĿǡֿնҲΪġߡ

2011꣬WiggleZƻϵ200,000ϵЩնΪ׼УΧϵľ룬ٲЩϵĺǰijDzҲóڴԼ70ǰʼ͵ĽۡͬʱĿǰԼΪ1/10

˹-߸ЧӦ

Ŀǰ۲⵽΢Ĺӣڵ֮̽ǰ߹˺ܳһξ롣ξϣӱȻܵ丽Ӱ죬ƻơʲȫȷֲ˹Ӿ·Ͻܶݣ⽫ɲͬı¶Ȳ졣Ȼԭʼ䣬΢Ĺӱʹɴ˶ĸԣ⹱΢ԵĴ󲿡˹-߸ЧӦڴ˻ϣһһָԡ

ͣı·ϵݵĹ죬ڹͨݵĹУֱ仯ϢڹС΢ĸԣ˽2008꣬Ho et al.ԼGiannantonio et al.Сֱ𱨵ǵķۣʾڼ͡

ڶ԰۽͵ij

˹ֹ̹̲ܽһ泣˹̹һʹһ̬⡣Ȼ˹̹һصĴ󣬵ļЧӦƺӦôһȻС

ȻһֱӡַšУǴҸϣһ͡ѧЧһʣڣҾиѹǿӳԤաա˸䣬ձȻΪܡЧӦµܼЧһѧҵǣԤԵֵͨȲİܶȣ10−29 g/cm3120Ҳѧһ̵⡣

ijЩѧۣ糬ԳۣиԱִһ⣬ΪʵеûбȷôһأȻԳƱȱܲϸΪ0һ棬ĿǰԳ޷ʵ֤Ƿȷģڶڱʵ֤ʵȻһЧۣΪԳȱľƲҲǿӰܵĴСܷȷİֵҲǼ鳬Գ۵һҪ׼

ҲֱһֱԱԪءм͡ǰ泣۲ͬһIJȡΪ˱ⲻȵij̶ֱ̫ҲеĶϵᣬܲһĿնٲ

ǣΪκγ۶뱻ӻֱҲ뱻ӻDZӳ۵ȶģҲ˵ܱ֤ȻСѡ

ijЩܻش𣬡Ϊǡܱǹ۲⵽⡣͵΢һ㣬ôϵγ֮ǰʾѾļͶ룬۳κϵϵͳҲͲܲˡЩ۾һֳΪtrackerʣtracker˼׷٣׷ٵĶеķ䡣ڷΪʱڣֱκЧӦҲǸš׷ŷߡ𽥱ϡͣܶȽܶ£ʹֱʼЧӦƶ𽥼͡

ʷĿ죬˽ⰵ״̬̣ѹǿܶȵĹϵȻλ£泣ѹǿֵϸܶ(w=-1)2004꣬һоƺ۲⵽һƫ롣

һЩ۱phantom energyԤ԰ܶȽʱŶӣյ¡˺ѡһЩdz󵨵ؽĶдɸġ

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