Towards sub-kpc scale kinematics of molecular and ionized gas of star-forming galaxies at z similar to 1

0539811 - ASÚ 2021 RIV FR eng J - Journal Article
Girard, M. … Total 7 authors
Towards sub-kpc scale kinematics of molecular and ionized gas of star-forming galaxies at z similar to 1.
Astronomy & Astrophysics. Roč. 631, October (2019), č. článku A91. ISSN 0004-6361. E-ISSN 1432-0746
Research Infrastructure: EU-ARC.CZ - 90067
Keywords : galaxies * high-redshift * kinematics and dynamics
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 5.636, year: 2019
Method of publishing: Open access
https://doi.org/10.1051/0004-6361/201935896

We compare the molecular and ionized gas kinematics of two strongly lensed galaxies at z similar to 1 that lie on the main sequence at this redshift. The observations were made with ALMA and MUSE, respectively. We derive the CO and [OII] rotation curves and dispersion profiles of these two galaxies. We find a difference between the observed molecular and ionized gas rotation curves for one of the two galaxies, the Cosmic Snake, for which we obtain a spatial resolution of a few hundred parsec along the major axis. The rotation curve of the molecular gas is steeper than the rotation curve of the ionized gas. In the second galaxy, A521, the molecular and ionized gas rotation curves are consistent, but the spatial resolution is only a few kiloparsec on the major axis. Using simulations, we investigate the effect of the thickness of the gas disk and effective radius on the observed rotation curves and find that a more extended and thicker disk smoothens the curve.
Permanent Link: http://hdl.handle.net/11104/0317514