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39 papers
Time variations of narrow absorption lines in high resolution quasar spectra
P. Boissé, J. Bergeron, J. X. Prochaska +2
Aims. We have searched for temporal variations of narrow absorption lines in high resolution quasar spectra. A sample of 5 distant sources have been assembled, for which 2 spectra…
A connection between extremely strong Damped Lyman-alpha Systems and Lyman-alpha Emitting Galaxies at small impact parameters
P. Noterdaeme, P. Petitjean, I. Paris +5
We present a study of ~100 high redshift (z~2-4) extremely strong damped Lyman-alpha systems (ESDLA, with N(HI)>0.5x10^22 cm^-2) detected in quasar spectra from the Baryon Oscillat…
A SINFONI Integral Field Spectroscopy Survey for Galaxy Counterparts to Damped Lyman-alpha Systems - V. Neutral and Ionised Phase Metallicities
Celine Peroux, Varsha P. Kulkarni, Donald G. York
The gas-phase and stellar metallicities have proven to be important parameters to constrain the star formation history of galaxies. However, HII regions associated with recent star…
A SINFONI Integral Field Spectroscopy Survey for Galaxy Counterparts to Damped Lyman-alpha Systems - IV. Masses and Gas Flows
Celine Peroux, Nicolas Bouche, Varsha P. Kulkarni +1
The circumgalactic medium (CGM) of typical galaxies is crucial to our understanding of the cycling of gas into, through and out of galaxies. One way to probe the CGM is to study ga…
SOAR Imaging of sub-Damped Lyman-Alpha Systems at z<1
Joseph D. Meiring, James T. Lauroesch, Lutz Haberzettl +4
We present deep ground based imaging of the environments of five QSOs that contain sub-Damped Lyman-alpha systems at z<1 with the SOAR telescope and SOI camera. We detect a clear s…
GMRT mini-survey to search for 21-cm absorption in Quasar-Galaxy Pairs at z~0.1
N. Gupta, R. Srianand, D. V. Bowen +2
We present the results from our 21-cm absorption survey of a sample of 5 quasar-galaxy pairs (QGPs), with the redshift of the galaxies in the range 0.03<zg<0.18, selected from the…