DISCOVERY OF A QUADRUPLE LENS IN CANDELS WITH A RECORD LENS REDSHIFT z=1.53

作者：van der Wel A^*; de Ven G van; Maseda M; Rix H W; Rudnick G H; Grazian A; Finkelstein S L; Koo D C; Faber S M; Ferguson H C; Koekemoer A M; Grogin N A; Kocevski D D

来源：Astrophysical Journal Letters, 2013, 777(1): L17.

DOI：10.1088/2041-8205/777/1/L17

• gravitational lensing: strong

Using spectroscopy from the Large Binocular Telescope and imaging from the Hubble Space Telescope we discovered the first strong galaxy lens at z(lens) %26gt; 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 %26apos;%26apos;.35; 3.0 kpc) encloses 7.6 x 10(10) M-circle dot, with an upper limit on the dark matter fraction of 60%. The highly magnified (40x) source galaxy has a very small stellar mass (similar to 10(8) M-circle dot) and shows an extremely strong [O III](5007 angstrom) emission line (EW0 similar to 1000 angstrom) bolstering the evidence that intense starbursts among very low-mass galaxies are common at high redshift.

• 出版日期2013-11-1