Dissecting the Multi-Phase Haloes of High Redshift Radio Galaxies with ALMA and MUSE
Abstract
I will present the most up-to-date observations of ionisation, excitation and absorption lines in the MUSE spectra of an interesting high redshift radio galaxy, MRC 0943-242 at z = 2.92. The spatial distribution of MUSE-detected emission in these lines reveals interactions between the galaxy’s radio jets and its ionised gas as well as possible evidence for tidal disruptions that may be associated with a minor merger. Line profile fitting to emission only components in CII], CIII], HeII, NIV] and OIII] reveal kinematically perturbed gas (FWHM > 1000 km/s) within a 40-60 kpc radial extent from the AGN. Fitting emission and absorption to resonant lines, Lyα and CIV reveal an absorbing gas medium in the form of concentric shells at z=2.91 and z=2.92. We measure their column densities. With our current observations and future work in modelling, we hope to further dissect and understand various aspects of the nature of gas surrounding high-redshift radio galaxies.
- Publication:
-
Walking the Line 2018
- Pub Date:
- March 2018
- DOI:
- 10.5281/zenodo.1210072
- Bibcode:
- 2018wtl..confE..14K
- Keywords:
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- galaxies: active;
- galaxies: high-redshift;
- galaxies: halos;
- jets and outflows;
- kinematics and dynamics;
- Zenodo community walk2018