DISCOVERY OF A QUADRUPLE LENS IN CANDELS WITH A RECORD LENS REDSHIFT z = 1.53
DISCOVERY OF A QUADRUPLE LENS IN CANDELS WITH A RECORD LENS REDSHIFT z = 1.53
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DOI：
10.1088/2041-8205/777/1/l17
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发表时间：
2013-09
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通讯作者：
A. van der Wel;G. van de Ven;M. Maseda;H. Rix;G. Rudnick;A. Grazian;S. Finkelstein;D. Koo;S. Faber;H. Ferguson;A. Koekemoer;N. Grogin;D. Kocevski
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作者：
A. van der Wel;G. van de Ven;M. Maseda;H. Rix;G. Rudnick;A. Grazian;S. Finkelstein;D. Koo;S. Faber;H. Ferguson;A. Koekemoer;N. Grogin;D. Kocevski
利用大双筒望远镜的光谱和哈勃太空望远镜的成像，我们发现了第一个z透镜> 1的强星系透镜。该透镜具有z = 1.53 ± 0.09的可靠光度红移，并且该源在z = 3.417处被光谱学确认。爱因斯坦半径（0.″35; 3.0 kpc）包含7.6 × 1010 M的引力，暗物质比例的上限为60%。高度放大（40倍）的源星系有一个非常小的恒星质量（108 M），并显示了一个非常强的[O iii]5007 <$E发射线（EW 0 <$1000 <$E）支持的证据，在非常低质量的星系中强烈的恒星爆发是常见的高红移。
Using spectroscopy from the Large Binocular Telescope and imaging from the Hubble Space Telescope we discovered the first strong galaxy lens at zlens > 1. The lens has a secure photometric redshift of z = 1.53 ± 0.09 and the source is spectroscopically confirmed at z = 3.417. The Einstein radius (0.″35; 3.0 kpc) encloses 7.6 × 1010 M☉, with an upper limit on the dark matter fraction of 60%. The highly magnified (40×) source galaxy has a very small stellar mass (∼108 M☉) and shows an extremely strong [O iii]5007 Å emission line (EW0 ∼ 1000 Å) bolstering the evidence that intense starbursts among very low-mass galaxies are common at high redshift.