Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-11-30
Astronomy and Astrophysics
Astrophysics
Accepted by A&A, 4 pages, 4 figures. High resolution figures are available via http://www.mso.anu.edu.au/~westra/publications/
Scientific paper
10.1051/0004-6361:200400126
We report the spectroscopic confirmation of a compact \lya emitting galaxy at $z=5.721$. A FORS2 spectrum of the source shows a strong asymmetric line with a flux of 5$\times10^{-17}$ erg s$^{-1}$ cm$^{-2}$, making it one of the brightest \lya 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\farcs5, which corresponds to 3.2 kpc at this redshift. This source is a brighter example of \object{J1236.8+6215} \citep{Dawson02}, another \lya\ emitting galaxy at $z\sim5.2$.
Athreya Ramana M.
Jones David Heath
Lidman Chris E.
Meisenheimer Klaus
Pompei Emanuela
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