Variability in low broad absorption line quasar outflows
M. Vivek1$, R. Srianand2, P. Noterdaeme3, P. Petitjean3 and V. C. Kuriakose1
1Cochin University of Science and Technology, Kochi, Kerala
2Inter University Centre for Astronomy and Astrophysics, Pune
3Institute d'Astrophysique, Paris
E-mail: vivekm@iucaa.ernet.in

Abstract. Quasar outflows have a huge impact on the evolution of central supermassive black holes, their host galaxies and the surrounding intergalactic medium. Studying the variability in these Broad Absorption Lines (BALs) can help us understand the structure, evolution, and basic physical properties of these outflows. Using the 2m telescope in IUCAA Girawali observatory we are conducting a repeated Low ionization BAL monitoring programme with 27 LoBALs (five of them are Fe LoBALs) at z ∼ 0.3 - 2.1 covering timescales from 3.22 to 7.69 years in the quasar rest frame. We see a variety of phenomena, including some BALs that either appeared or disappeared completely and some BALs which do not vary over the observation period. In one case, the excited fine structure lines have changed dramatically. One source shows signatures of radiative acceleration. Here we present the results from this ongoing programme.