Spectra of the QSO pair Q0307-195A,B have been obtained in the Lyα forest (3660–3930 Å) and C iv (4720–4850 Å) regions with a FWHM resolution between 0.7 and 0.5 Å. 46 lines have been detected in the spectrum of object A while 36 in the spectrum of object B, of them 29 and 20 were identified as Lyα absorptions respectively. The present observations have been supplemented with data of comparable...

Using a simple method to interpret the luminosity function of Lyα emitters, we explore properties of Lyα emitters from 5.7 6 z 6 8.8 with various assumptions about metallicity and stellar mass spectra. We constrain a mass-to-“observed light” ratio, Mh/Lband, where Mh refers to the total mass of the host halo, and Lband refers to the observed luminosity of the source. For narrow-band surveys, Lb...

We investigate the Lyα and UV continuum morphology of one of the most luminous known Lyman α emitting galaxies (the ‘Coup Fourré Galaxy’), associated with a z = 2.3 damped Lyα absorption system in the spectrum of the QSO PHL 957 (Lowenthal et al. 1991). The galaxy was observed with the HST WFPC2, through a narrow filter (F410M) corresponding to rest-frame Lyα for a total exposure time of 41.2 k...

We investigate the Lyα and UV continuum morphology of one of the most luminous known Lyman α emitting galaxies (the ‘Coup Fourré Galaxy’), associated with a z = 2.3 damped Lyα absorption system in the spectrum of the QSO PHL 957 (Lowenthal et al. 1991). The galaxy is observed with the HST WFPC2, through a narrow filter (F410M) corresponding to rest-frame Lyα for a total exposure time of 41.2 ks...

In an ongoing programme to identify a sample of high z DLA galaxies we have found the long sought for case of a Lyα emitter seen in the centre of a broad DLA trough. This is the predicted “textbook case” of an intervening DLA galaxy if DLA galaxies are small, but would not be expected if intervening high redshift DLA galaxies have large gaseous disks. The Lyα flux is 5.4 −0.8 × 10 ergs scm simi...

We present the results of a search for Lyα emission galaxies at z ≈ 5.7 in the FORS Deep Field. The objective of this study is to improve the faint end of the luminosity function of high-redshift Lyα emitting galaxies and to derive properties of intrinsically faint Lyα emission galaxies in the young universe. Using FORS2 at the ESO VLT and a set of special interference filters, we identified ca...