28 citations · 52 across the 6 of their papers we have counts for
9 papers
Constraining the Metallicities of Damped Ly Systems Using Extinction Curves
Hassan Fathivavsari
In this paper, we present a new method to constrain the metallicities of high redshift damped Ly (DLA) absorbers using observed extinction curves. This is the first time such an…
Using Machine Learning to Find Ghostly Damped Ly Systems in SDSS DR14
Hassan Fathivavsari
We report the discovery of 59 new ghostly absorbers from the Sloan Digital Sky Survey (SDSS) Data Release 14 (DR14). These absorbers, with , reveal…
Deep Learning Prediction of Quasars Broad Ly Emission Line
Hassan Fathivavsari
We have employed deep neural network, or deep learning to predict the flux and the shape of the broad Ly emission lines in the spectra of quasars. We use 17870 high signal-to-no…
Deep Hubble Space Telescope Imaging on the Extended Ly Emission of a QSO at with Damped Lyman Alpha System as a Natural Coronagraph
Jiani Ding, Zheng Cai, J. Xavier Prochaska +5
Recent observations suggest that proximate damped Ly (PDLA) systems can be used to study the host galaxies of Quasi-stellar objects (QSOs), because the PDLAs can block the brigh…
Ghostly Damped Ly Systems: Tracers of Gas Flows in the Close Vicinity of Quasars ?
Hassan Fathivavsari
We have searched the Sloan Digital Sky Survey Data Release 12 for ghostly Damped Ly (DLA) systems. These systems, located at the redshift of the quasars, show strong absorption…
Proximate Molecular Quasar Absorbers: Excess of damped H2 systems at zabs~zQSO in SDSS DR14
P. Noterdaeme, S. Balashev, J. -K. Krogager +4
We present results from a search for strong H2 absorption systems proximate to quasars (zabs~zem) in the Sloan Digital Sky Survey (SDSS) Data Release 14. The search is based on the…