%0 Generic %1 rahmani2016study %A Rahmani, Hadi %A Peroux, Celine %A Turnshek, David A. %A Rao, Sandhya M. %A Quiret, Samuel %A Hamilton, Timothy S. %A Kulkarni, Varsha P. %A Monier, Eric M. %D 2016 %K dla galaxies host low-z %T A study of the circum-galactic medium at z ~ 0.6 using DLA-galaxies %U http://arxiv.org/abs/1609.03843 %X We present the study of a sample of nine QSO fields, with damped-Ly-alpha (DLA) or sub-DLA systems at z~0.6, observed with the X-Shooter spectrograph at the Very Large Telescope. By suitably positioning the X-Shooter slit based on high spatial resolution images of HST/ACS we are able to detect absorbing galaxies in 7 out of 9 fields (~ 78\% success rate) at impact parameters from 10 to 30 kpc. In 5 out of 7 fields the absorbing galaxies are confirmed via detection of multiple emission lines at the redshift of DLAs where only 1 out of 5 also emits a faint continuum. In 2 out of these 5 fields we detect a second galaxy at the DLA redshift. Extinction corrected star formation rates (SFR) of these DLA-galaxies, estimated using their H-alpha fluxes, are in the range 0.3-6.7 M_sun yr^-1. The emission metallicities of these five DLA-galaxies are estimated to be from 0.2 to 0.9 Z_sun. Based on the Voigt profile fits to absorption lines we find the metallicity of the absorbing neutral gas to be in a range of 0.05--0.6 Z_sun. The two remaining DLA-galaxies are quiescent galaxies with SFR < 0.4 M_sun yr^-1 (3-sigma) presenting continuum emission but weak or no emission lines. Using X-Shooter spectrum we estimate i-band absolute magnitude of -19.5+/-0.2 for both these DLA-galaxies that indicates they are sub-L* galaxies. Comparing our results with that of other surveys in the literature we find a possible redshift evolution of the SFR of DLA-galaxies.

@misc{rahmani2016study, abstract = {We present the study of a sample of nine QSO fields, with damped-Ly-alpha (DLA) or sub-DLA systems at z~0.6, observed with the X-Shooter spectrograph at the Very Large Telescope. By suitably positioning the X-Shooter slit based on high spatial resolution images of HST/ACS we are able to detect absorbing galaxies in 7 out of 9 fields (~ 78\% success rate) at impact parameters from 10 to 30 kpc. In 5 out of 7 fields the absorbing galaxies are confirmed via detection of multiple emission lines at the redshift of DLAs where only 1 out of 5 also emits a faint continuum. In 2 out of these 5 fields we detect a second galaxy at the DLA redshift. Extinction corrected star formation rates (SFR) of these DLA-galaxies, estimated using their H-alpha fluxes, are in the range 0.3-6.7 M_sun yr^-1. The emission metallicities of these five DLA-galaxies are estimated to be from 0.2 to 0.9 Z_sun. Based on the Voigt profile fits to absorption lines we find the metallicity of the absorbing neutral gas to be in a range of 0.05--0.6 Z_sun. The two remaining DLA-galaxies are quiescent galaxies with SFR < 0.4 M_sun yr^-1 (3-sigma) presenting continuum emission but weak or no emission lines. Using X-Shooter spectrum we estimate i-band absolute magnitude of -19.5+/-0.2 for both these DLA-galaxies that indicates they are sub-L* galaxies. Comparing our results with that of other surveys in the literature we find a possible redshift evolution of the SFR of DLA-galaxies.}, added-at = {2016-09-14T09:40:39.000+0200}, author = {Rahmani, Hadi and Peroux, Celine and Turnshek, David A. and Rao, Sandhya M. and Quiret, Samuel and Hamilton, Timothy S. and Kulkarni, Varsha P. and Monier, Eric M.}, biburl = {https://www.bibsonomy.org/bibtex/266a392861febf666fd0f4d319614225a/miki}, description = {[1609.03843] A study of the circum-galactic medium at z ~ 0.6 using DLA-galaxies}, interhash = {b00975c5dc62e904560a15be88d60ad9}, intrahash = {66a392861febf666fd0f4d319614225a}, keywords = {dla galaxies host low-z}, note = {cite arxiv:1609.03843Comment: MNRAS accepted}, timestamp = {2016-09-14T09:40:39.000+0200}, title = {A study of the circum-galactic medium at z ~ 0.6 using DLA-galaxies}, url = {http://arxiv.org/abs/1609.03843}, year = 2016 }