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通風(fēng)換氣次數(shù):ireland closes legal drugs loophole - cnn.com科

科學(xué)家認(rèn)為星系周圍存在大量的暗物質(zhì)分布,但是沒(méi)有人知道暗物質(zhì)到底是什么

來(lái)源:騰訊網(wǎng) 更新時(shí)間:2016-03-12 08:12:22 分類:科技 關(guān)鍵詞:疑為暗物質(zhì)信號(hào)

    科學(xué)家發(fā)現(xiàn)神秘伽瑪射線 疑為暗物質(zhì)信號(hào)

    Varadkar also told the Irish Times that the court ruling could affect "dozens" of cases, although The Journal of Ireland said the court's decision will affect only cases now in the judicial process.

    瀏覽原文:

    早期理論認(rèn)為暗物質(zhì)粒子可能是大質(zhì)量弱相互作用粒子,粒子間彼此湮滅可產(chǎn)生高能伽瑪射線。如果這個(gè)推測(cè)是真實(shí)的,那么我們應(yīng)該探測(cè)到非常多的伽瑪射線,尤其是星系的中央附近。更麻煩的是,黑洞、脈沖星等也會(huì)產(chǎn)生伽瑪射線,這就使得真正的暗物質(zhì)粒子湮滅信號(hào)會(huì)混雜其中。但這個(gè)矮星系卻提供了一種途徑,因?yàn)榭茖W(xué)家認(rèn)為此類星系沒(méi)有復(fù)雜的伽瑪環(huán)境,是非常干凈且安靜的天體系統(tǒng)。本項(xiàng)研究的論文已經(jīng)提交到物理評(píng)論快報(bào)上。(羅輯/編譯)



    科學(xué)家發(fā)現(xiàn)神秘伽瑪射線 疑為暗物質(zhì)信號(hào)

    科學(xué)家發(fā)現(xiàn)神秘伽瑪射線 疑為暗物質(zhì)信號(hào)

    來(lái)源:Cnn 更新時(shí)間:2016-03-12 08:40:54 分類:News 關(guān)鍵詞:...

    Varadkar said the temporarily legalized substances -- which include a wide array of synthetic or "head shop" drugs -- "all have very significant health risks that outweigh any perceived recreational benefits," according to the Irish Times.

    (CNN)Well, it was weird while it lasted.

    雖然這個(gè)信號(hào)的初步分析結(jié)果令人興奮,但科學(xué)家也承認(rèn)之后還有更多的工作要進(jìn)行。關(guān)于伽瑪射線與暗物質(zhì)的聯(lián)系,科學(xué)家認(rèn)為我們已經(jīng)知道暗物質(zhì)的存在,并了解其所具有的引力特點(diǎn),同時(shí)也推測(cè)出星系周圍存在暗物質(zhì)群,但是沒(méi)有人知道暗物質(zhì)到底是什么。馬修-沃克不僅是卡內(nèi)基-梅隆大學(xué)物理學(xué)助理教授,也是麥克威廉姆斯宇宙學(xué)中心成員,他認(rèn)為暗物質(zhì)的引力探測(cè)能夠告訴你暗物質(zhì)粒子的行為,但我們現(xiàn)在卻可以通過(guò)非引力途徑探測(cè)暗物質(zhì),這說(shuō)明暗物質(zhì)的行為有些像粒子。

    The emergency law moved through the Irish legislature and was signed by the President on Wednesday, meaning that the drugs would become illegal to possess again at midnight, a Department of Health spokeswoman told CNN.

    瀏覽原文:

    The original schedule of substances listed in the 1977 law -- including cannabis, cocaine and heroin -- were untouched by the appeals court ruling and remained illegal.

    Story highlights


      The loophole was inadvertently opened the day before, when an appeals court invalidated one section of the Misuse of Drugs Act 1977.

      騰訊太空訊 據(jù)國(guó)外媒體報(bào)道,來(lái)自卡內(nèi)基-梅隆、布朗和劍橋三所高校的科學(xué)家在一個(gè)新發(fā)現(xiàn)的矮星系中探測(cè)到可疑的信號(hào),進(jìn)一步的分析認(rèn)為這可能與暗物質(zhì)有關(guān)。新發(fā)現(xiàn)的矮星系被命名為Reticulum 2,來(lái)自暗能量巡天調(diào)查,在過(guò)去的數(shù)周時(shí)間內(nèi),科學(xué)家確定了這個(gè)矮星系基本情況,它距離我們大約9.8萬(wàn)光年。同時(shí),科學(xué)家在Reticulum 2矮星系內(nèi)探測(cè)到不明高能伽瑪射線。本研究論文的第一作者亞歷克斯-格林格認(rèn)為該星系似乎不存在伽瑪射線源,因此這可能是暗物質(zhì)的信號(hào)。

      Ireland closes legal drugs loophole - CNN.com

      Ireland closes legal drugs loophole - CNN.com

      "We prepared for this possibility. Legislation was prepared and approved in advance by Cabinet," Minister for Health Leo Varadkar said in a written statement. "The emergency legislation ... will re-instate the status quo ante and re-control all drugs that were controlled prior to this judgment."

      The court ruled that Irish governments had been unconstitutionally adding substances to Section 2 of the law for decades.


      On Wednesday, lawmakers in Ireland rushed to close a loophole that temporarily made it legal to possess Ecstasy, crystal methamphetamine, ketamine, magic mushrooms and a host of other recreational drugs.

      暗能量巡天主要針對(duì)南半球的天空進(jìn)行,科學(xué)家試圖通過(guò)巡天數(shù)據(jù)了解宇宙加速膨脹之謎。為了對(duì)遙遠(yuǎn)宇宙天體進(jìn)行觀測(cè),來(lái)自卡內(nèi)基-梅隆大學(xué)的研究人員亞歷克斯-格林格、馬修-沃克和布朗大學(xué)的薩瓦斯認(rèn)為伽瑪射線是研究未知天體行為的重要途徑,而且其較為容易被探測(cè)到,這是因?yàn)橐坏┻b遠(yuǎn)星系出現(xiàn)伽瑪射線活動(dòng),我們就可以從巡天背景值中分析出來(lái)。布朗教授認(rèn)為矮星系中釋放的伽瑪射線是一個(gè)非常強(qiáng)力的信號(hào),有望發(fā)現(xiàn)與暗物質(zhì)有關(guān)的線索。

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