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首页> 外文期刊>Nature >A single low-energy, iron-poor supernova as the source of metals in the star SMSS J031300.36-670839.3
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A single low-energy, iron-poor supernova as the source of metals in the star SMSS J031300.36-670839.3

机译：SMSS J031300.36-670839.3星中的单个低能，贫铁超新星作为金属来源

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the element abundance ratios of four low-mass stars with extremely low metallicities (abundances of elements heavier than helium) indicate that the gas out of which the stars formed was enriched in each case by at most a few-and potentially only one-low-energy supernova. such supernovae yield large quantities of light elements such as carbon but very little iron. the dominance of low-energy supernovae seems surprising; because it had been expected that the first stars were extremely massive; and that they disintegrated in pair-instability explosions that would rapidly enrich galaxies in iron. what has remained unclear is the yield of iron from the first supernovae; because hitherto no star has been unambiguously interpreted as encapsulating the yield of a single supernova. here we report the optical spectrum of smss j031300.36- 670839.3; which shows no evidence of iron (with an upper limit of 10 times solar abundance). based on a comparison of its abundance pattern with those of models; we conclude that the star was seeded with material from a single supernova with an original mass about 60 times that of the sun (and that the supernova left behind a black hole). taken together with the four previously mentioned low-metallicity stars; we conclude that low-energy supernovae were common in the early universe; and that such supernovae yielded light-element enrichment with insignificant iron. reduced stellar feedback both chemically and mechanically from low-energy supernovae would have enabled first-generation stars to form over an extended period. we speculate that such stars may perhaps have had an important role in the epoch of cosmic reionization and the chemical evolution of early galaxies.%Southern Sky Survey中所发现的一个引人注目的恒星。被称为SMSS0313-6708的这个恒星的光谱显示它没有可以检测得到的铁，这说明它的铁含量至少要比以前所知含铁量最低恒星低30倍。作者的结论是，这个恒星的化学组成带有原始质量约为太阳质量60倍的一颗超新星的爆炸印记。与四个以前发现的低金属恒星(这里所说的"金属"是指任何一种比氦重的元素）所做比较表明，低能超新星在早期宇宙中也许是普遍的，这种超新星产生了铁含量不高的轻元素富集。这些低铁恒星也许能让我们有机会一瞥宇宙再电离和早期星系的化学演变等过程。
机译：四颗金属质量极低的低质量恒星的元素丰度比（比氦重的元素的丰度）表明，形成恒星的气体在每种情况下最多富集了几个，甚至可能只有一个-低-能量超新星。这种超新星产生大量的轻元素，例如碳，但铁很少。低能超新星的优势似乎令人惊讶；因为人们预计第一批恒星非常庞大；并且它们在成对不稳定的爆炸中崩解，这将迅速丰富铁中的星系。尚不清楚的是第一批超新星的铁产量；因为迄今为止，没有恒星被明确地解释为封装了单个超新星的产量。在这里，我们报告了短信j031300.36- 670839.3的光谱；没有铁迹象（上限为太阳丰度的10倍）。基于其丰度模式与模型的比较；我们得出的结论是，该恒星是用单个超新星的物质播种的，其原始质量约为太阳的60倍（并且超新星留下了一个黑洞）。与前面提到的四颗低金属星一起；我们得出的结论是，低能超新星在宇宙早期很常见。并且这种超新星产生了微量铁的轻元素富集。低能超新星在化学和机械方面减少的恒星反馈，将使第一代恒星能够在更长的时间内形成。我们推测此类恒星可能在宇宙电离时代和早期星系的化学演化中起着重要作用。％Southern Sky Survey中所发现的一个引人注目的恒星。被称为SMSS0313-6708的这个恒星的光谱显示它没有可以检测得到的铁，这说明它的铁含量至少要比以前所知的含铁量最低恒星低30倍。作者的认为是，这个恒星的化学组成带有原始质量大约太阳质量与四个以前发现的低金属恒星（这里所说的“金属”是指任何一种比氦重的元素）进行比较表明，低能超新星在早期宇宙中也许是普遍的，这种超新星产生了铁含量不高的轻元素富集。这些低铁恒星也许能让我们有机会一瞥宇宙再电离和早期星系的化学演化等过程。

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  • 来源
    《Nature》 |2014年第7489期|463-466C3|共5页
  • 作者

    S. C. Keller; M. S. Bessell; A. Frebel; A. R. Casey; M. Asplund; H. R. Jacobson; K. Lind; J. E. Norris; D. Yong; A. Heger; Z. Magic; G. S. Da Costa1; B. P. Schmidt; P. Tisserand;

  • 作者单位

    Research School of Astronomy and Astrophysics, Mount Stromlo Observatory, Cotter Road, Weston, Australian Capital Territory 2611, Australia;

    Research School of Astronomy and Astrophysics, Mount Stromlo Observatory, Cotter Road, Weston, Australian Capital Territory 2611, Australia;

    Department of Physics, Massachusetts Institute of Technology and Kavli Institute for Astrophysics and Space Research, Cambridge, Massachusetts 02139, USA;

    Research School of Astronomy and Astrophysics, Mount Stromlo Observatory, Cotter Road, Weston, Australian Capital Territory 2611, Australia;

    Research School of Astronomy and Astrophysics, Mount Stromlo Observatory, Cotter Road, Weston, Australian Capital Territory 2611, Australia;

    Department of Physics, Massachusetts Institute of Technology and Kavli Institute for Astrophysics and Space Research, Cambridge, Massachusetts 02139, USA;

    Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 OHA, UK;

    Research School of Astronomy and Astrophysics, Mount Stromlo Observatory, Cotter Road, Weston, Australian Capital Territory 2611, Australia;

    Research School of Astronomy and Astrophysics, Mount Stromlo Observatory, Cotter Road, Weston, Australian Capital Territory 2611, Australia;

    School of Mathematical Sciences, Monash University, Victoria 3800, Australia;

    Research School of Astronomy and Astrophysics, Mount Stromlo Observatory, Cotter Road, Weston, Australian Capital Territory 2611, Australia,Max-P1anck-Institut fur Astrophysik, Karl-Schwarzschild-Strasse 1, Garching 85741, Germany;

    Research School of Astronomy and Astrophysics, Mount Stromlo Observatory, Cotter Road, Weston, Australian Capital Territory 2611, Australia;

    Research School of Astronomy and Astrophysics, Mount Stromlo Observatory, Cotter Road, Weston, Australian Capital Territory 2611, Australia;

    Research School of Astronomy and Astrophysics, Mount Stromlo Observatory, Cotter Road, Weston, Australian Capital Territory 2611, Australia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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