5 papers
Nitrogen Abundances in High-z DLAs
P. Molaro, M. Centurion, V. D'Odorico +1
Determination of chemical abundances for elements produced mainly by Type I SNae and intermediate mass stars in high redshift DLAs probes the early chemical build-up on time-scales…
UVES observations of QSO 0000-2620: Molecular hydrogen abundance in the damped Ly-alpha system at z_abs = 3.3901
S. A. Levshakov, P. Molaro, M. Centurion +3
We have discovered molecular hydrogen in a fourth quasar damped Ly-alpha system (hereafter DLA). The UVES spectrograph on the 8.2m ESO Kueyen telescope has allowed the detection of…
Low deuterium abundance in the zabs=3.514 absorber towards APM 08279+5255
Paolo Molaro, Piercarlo Bonifacio, Miriam Centurion +1
A high-resolution, high signal-to-noise HIRES-Keck spectrum of APM 08279+5255 reveals a feature in the HI Ly alpha profile of the zabs=3.514 absorber at the expected position of th…
The absorption system towards PKS 0118-272: A candidate Damped Ly system at low redshift
G. Vladilo, M. Centurion, R. Falomo +1
We present a spectroscopic and imaging study of the z=0.558 MgII absorption system towards the BL Lac PKS 0118-272. At the absorber redshift we detect lines of the low ionization s…
NGC 4526 gas, High Velocity Clouds, and Galactic Halo gas: the Interstellar Medium towards SN 1994D
D. L. King, G. Vladilo, K. Lipman +4
We present spectroscopic observations of supernova 1994D in NGC 4526, an S0 galaxy in the Virgo cluster 15 Mpc distant. The datasets consist of the interstellar Ca\II\ and Na\I…