SIMBAD references

2018MNRAS.479.5440L - Mon. Not. R. Astron. Soc., 479, 5440-5447 (2018/October-0)

Neutral versus ionized gas kinematics at z ≃ 2.6: the AGN-host starburst galaxy PKS 0529-549.


Abstract (from CDS):

We present a multiwavelength study of the AGN-host starburst galaxy PKS 0529-549 at z ≃ 2.6. We use (1) new ALMA observations of the dust continuum and of the [CI] 370 µm line, tracing molecular gas, (2) SINFONI spectroscopy of the [O III] 5007 Å line, tracing ionized gas, and (3) ATCA radio continuum images, tracing synchrotron emission. Both [C I] and [O III] show regular velocity gradients, but their systemic velocities and position angles differ by ∼300 km s–1 and ∼30°, respectively. The [C I] is consistent with a rotating disc, aligned with the dust and stellar continuum, while the [O III] likely traces an outflow, aligned with two AGN-driven radio lobes. We model the [C I] cube using 3D disc models, which give best-fitting rotation velocities Vrot ≃ 310 km s–1and velocity dispersions σV <= 30 km s–1. Hence, the [C I] disc has VrotV >=10 and is not particularly turbulent, similar to local galaxy discs. The dynamical mass (∼1011 M) is comparable to the baryonic mass within the errors. This suggests that baryons dominate the inner galaxy dynamics, similar to massive galaxies at z ≃ 0. Remarkably, PKS 0529-549 lies on the local baryonic Tully-Fisher relation, indicating that at least some massive galaxies are already in place and kinematically relaxed at z ≃ 2.6. This work highlights the potential of the [C I] line to trace galaxy dynamics at high z, as well as the importance of multiwavelength data to interpret gas kinematics.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): galaxies: active - galaxies: evolution - galaxies: individual: PKS 0529-549 - galaxies: kinematics and dynamics - galaxies: starburst - (cosmology:) dark matter

Simbad objects: 7

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