TY  - JOUR
A1  - Zabl, Johannes
A1  - Bouche, Nicolas F.
A1  - Schroetter, Ilane
A1  - Wendt, Martin
A1  - Finley, Hayley
A1  - Schaye, Joop
A1  - Conseil, Simon
A1  - Contini, Thierry
A1  - Marino, Raffaella Anna
A1  - Mitchell, Peter
A1  - Muzahid, Sowgat
A1  - Pezzulli, Gabriele
A1  - Wisotzki, Lutz
T1  - MusE GAs FLOw and Wind (MEGAFLOW)
T2  - Monthly notices of the Royal Astronomical Society
N2  - We use the MusE GAs FLOw and Wind (MEGAFLOW) survey to study the kinematics of extended disc-like structures of cold gas around z approximate to 1 star-forming galaxies. The combination of VLT/MUSE and VLT/UVES observations allows us to connect the kinematics of the gas measured through MgII quasar absorption spectroscopy to the kinematics and orientation of the associated galaxies constrained through integral field spectroscopy. Confirming previous results, we find that the galaxy-absorber pairs of the MEGAFLOW survey follow a strong bimodal distribution, consistent with a picture of MgII absorption being predominantly present in outflow cones and extended disc-like structures. This allows us to select a bona-fide sample of galaxy-absorber pairs probing these discs for impact paramometers of 10-70 kpc. We test the hypothesis that the disc-like gas is co-rotating with the galaxy discs, and find that for seven out of nine pairs the absorption velocity shares the sign of the disc velocity, disfavouring random orbits. We further show that the data are roughly consistent with inflow velocities and angular momenta predicted by simulations, and that the corresponding mass accretion rates are sufficient to balance the star formation rates.
KW  - galaxies: evolution
KW  - galaxies: formation
KW  - galaxies: haloes
KW  - galaxies: kinematics and dynamics
KW  - quasars: absorption lines
Y1  - 2019
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/49496
SN  - 0035-8711
SN  - 1365-2966
VL  - 485
IS  - 2
SP  - 1961
EP  - 1980
PB  - Oxford Univ. Press
CY  - Oxford
ER  -