73 citations · 135 across the 3 of their papers we have counts for
3 papers
astro-ph.CO2009
21-cm absorbers at intermediate redshifts
N. Gupta, R. Srianand, P. Petitjean +2
Damped Lyman-alpha systems (DLAs) seen in the spectra of high-z QSOs allow us to probe the physical conditions in protogalaxies. Our understanding of physical conditions in DLAs at…
astro-ph2008★ 62 cited
HD molecules at high redshift: A low astration factor of deuterium in a solar-metallicity DLA system at z=2.418
P. Noterdaeme, P. Petitjean, C. Ledoux +2
We present the detection of deuterated molecular hydrogen (HD) in the remote Universe in a damped Lyman-alpha cloud at zabs=2.418 toward the quasar SDSS J143912.04+111740.5. This i…
astro-ph2008★ 73 cited
Detection of the 2175Å~ extinction feature and 21-cm absorption in two MgII systems at z~1.3
R. Srianand, N. Gupta, P. Petitjean +2
We have discovered two dusty intervening MgII absorption systems at z~1.3 in the Sloan Digital Sky Survey (SDSS) database. The overall spectra of both QSOs are red (u-K>4.5 mag) an…