The Wide Field Imager Lyman-Alpha Search (WFILAS) for galaxies at redshift ~5.7 - I. A spatially compact Lyα emitting galaxy at redshift 5.721

The Wide Field Imager Lyman-Alpha Search (WFILAS) for galaxies at redshift ~5.7 - I. A spatially compact Lyα emitting galaxy at redshift 5.721
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宽视场成像仪莱曼-阿尔法搜索 (WFILAS),用于红移 ~5.7 处的星系 - I. 红移 5.721 处的空间紧凑的 Lyα 发射星系

DOI:
10.1051/0004-6361:200400126
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发表时间:
2004
影响因子:
6.5
通讯作者:
L. Vanzi
L. Vanzi
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
E. Westra;D. Jones;C. Lidman;R. Athreya;K. Meisenheimer;C. Wolf;T. Szeifert;E. Pompei;L. Vanzi

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我们报告了在 $z=5.721$ 处存在紧凑 Ly α 发射星系的光谱证实。源的 FORS2 光谱显示出一条强烈的不对称线,通量为 $5\times 10^{-17}$ erg s -1 cm -2 ,使其成为该红移处最亮的 Ly α 发射星系之一,视线速度色散为 400 km s -1 。我们还初步检测到了第二个较窄的分量,该分量相对于主峰红移了 400 km s -1 。 FORS2 图像显示源是紧凑的,FWHM 为 0$\farcs$5,对应于该红移处的 3.2 kpc。该光源是 J1236.8+6215 ([CITE], ApJ, 570, 92) 的一个更亮的例子,它是位于 $z\sim5.2$ 的另一个 Ly α  发射星系。
We report the spectroscopic confirmation of a compact Ly α emitting galaxy at $z=5.721$. A FORS2 spectrum of the source shows a strong asymmetric line with a flux of $5\times 10^{-17}$ erg s -1 cm -2 , making it one of the brightest Ly α emitting galaxies at this redshift, and a line-of-sight velocity dispersion of 400 km s -1 . We also have a tentative detection of a second, narrower component that is redshifted by 400 km s -1 with respect to the main peak. A FORS2 image shows that the source is compact, with a FWHM of 0$\farcs$5, which corresponds to 3.2 kpc at this redshift. This source is a brighter example of J1236.8+6215 ([CITE], ApJ, 570, 92), another Ly α  emit ting galaxy at $z\sim5.2$.