The wide field imager Lyman-alpha search (WFILAS) for galaxies at redshift ?5.7* I. A. spatially compact Ly? emitting galaxy at redshift 5.721

Westra E.; Jones, D. H.; Lidman C.E.; Szeifert T.; Pompei E.; Vanzi L.; Athreya R.M.; Meisenheimer K.; Wolf, C

Keywords: evolution, search, dispersion, emission, field, galaxies, scattering, velocity, imaging, starburst, measurement, power, wave, optical, astrophysics, high-redshift, devices, charge, analysis, imager, lyman-alpha, photoionization, techniques, spectroscopic, wide, electromagnetic, coupled, resolving, Galaxies:, individual:, J114334.98-014433.9, (WFILAS)

Abstract

We report the spectroscopic confirmation of a compact Ly? emitting galaxy at z = 5.721. A FORS2 spectrum of the source shows a strong asymmetric line with a flux of 5 × 10 -17 erg s -1 cm -2, making it one of the brightest Ly? 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?.75, which corresponds to 3.2 kpc at this redshift**. This source is a brighter example of J1236.8+6215 (Dawson et al. 2002, ApJ, 570, 92), another Lya emitting galaxy at z ? 5.2.

Más información

Título de la Revista: ASTRONOMY AND ASTROPHYSICS
Volumen: 430
Número: 2
Editorial: EDP Sciences
Fecha de publicación: 2005
URL: http://www.scopus.com/inward/record.url?eid=2-s2.0-13244277684&partnerID=q2rCbXpz