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15 papers · 2 filters
Confirmation of the existence of coherent orientations of quasar polarization vectors on cosmological scales
D. Hutsemekers, H. Lamy
In order to verify the existence of coherent orientations of quasars polarization vectors on very large scales, we have obtained new polarization measurements for a sample of quasa…
The XMM-Newton Optical/UV Monitor Telescope
K. O. Mason, A. A. Breeveld, R. Much +16
The XMM-OM instrument extends the spectral coverage of the XMM-Newton observatory into the ultraviolet and optical range. It provides imaging and time-resolved data on targets simu…
High resolution X-Ray spectroscopy of Zeta Puppis with the XMM-Newton Reflection Grating Spectrometer
S. M. Kahn, M. A. Leutenegger, J. Cottam +5
We present the first high resolution X-ray spectrum of the bright O4Ief supergiant star Zeta Puppis, obtained with the Reflection Grating Spectrometer on-board XMM-Newton. The spec…
The z=0.0912 and z=0.2212 Damped Lyman Alpha Galaxies Along the Sight-Line Toward the Quasar OI 363
D. A. Turnshek, S. Rao, D. Nestor +4
New optical and infrared observations along the sight-line toward the quasar OI 363 (0738+313) are presented and discussed. Excluding systems which lack confirming UV spectroscopic…
The Old Halo metallicity gradient: the trace of a self-enrichment process
G. Parmentier, E. Jehin, P. Magain +2
Based on a model of globular cluster self-enrichment published in a previous paper, we present an explanation for the metallicity gradient observed throughout the galactic Old Halo…
Lensing properties of 7 damped Lyman-alpha absorbing galaxy-QSO pairs
Vincent Le Brun, Alain Smette, Jean Surdej +1
Le Brun et al. (1997) presented the first identifications of the galaxies giving rise to 7 intermediate redshift damped Ly-alpha (DLA) absorption systems. Here, we study the gravit…