146 citations · 377 across the 5 of their papers we have counts for
5 papers
Intergalactic HeII absorption towards QSO 1157+3143
D. Reimers, C. Fechner, H. -J. Hagen +3
We report the discovery of a further line of sight allowing detection of HeII Ly alpha absorption by the intergalactic medium. A HST/STIS survey of 32 bright z ~ 3 quasars selected…
Caught in the act: a helium-reionizing quasar near the line of sight to Q0302-003
P. Jakobsen, R. A. Jansen, S. Wagner +1
We report the discovery of a quasar at z=3.050+/-0.003, closely coincident in redshift with the isolated low-opacity feature seen near z~3.056 in the otherwise black portion of the…
Are high-redshift DLA galxies Lyman-break galaxies?
P. Møller, S. J. Warren, S. M. Fall +2
We use deep HST STIS and NICMOS images of three spectroscopically confirmed galaxy counterparts of high-redshift damped Ly-alpha (DLA) absorbers (one of which is a new discovery) t…
NICMOS imaging search for damped Lya galaxies
S. J. Warren, P. Moller, S. M. Fall +1
We are engaged in a programme of imaging with the STIS and NICMOS (NIC2) instruments aboard the Hubble Space Telescope (HST), to search for the galaxy counterparts of 18 high-redsh…
Redshifts of 10 quasar candidates in the field of the rich absorption line quasar QSO 0122-380
R. A. Jansen, P. Jakobsen
We have obtained low resolution (~20 Angstrom FWHM) slit spectra of 10 quasar candidates located within one degree of the z = 2.181 quasar Q0122-380 with the objective of searching…