Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12666/423
Title: | Galaxy-scale ionised winds driven by ultra-fast outflows in two nearby quasars |
Authors: | Marasco, A. Cresci, G. Nardini, E. Mannucci, F. Marconi, A. Tozzi, P. Amiri, A. Venturi, G. Piconcelli, E. Lanzuisi, G. Tombesi, F. Mingozzi, M. Perna, M. Carniani, S. Brusa, M. Di Serego Alighieri, S. |
Keywords: | Quasars: individual;MR 2251-178;PG 1126−041;ISM; jets and outflows;Techniques: imaging spectroscopy;Galaxies: ISM |
Issue Date: | 24-Nov-2020 |
Publisher: | EDP Sciences |
DOI: | 10.1051/0004-6361/202038889 |
Published version: | https://www.aanda.org/articles/aa/abs/2020/12/aa38889-20/aa38889-20.html |
Citation: | Astronomy and Astrophysics 644: A15(2020) |
Abstract: | We used MUSE adaptive optics data in narrow field mode to study the properties of the ionised gas in MR 2251-178 and PG 1126-041, two nearby (z similar or equal to 0.06) bright quasars (QSOs) hosting sub-pc scale ultra-fast outflows (UFOs) detected in the X-ray band. We decomposed the optical emission from diffuse gas into a low- and a high-velocity components. The former is characterised by a clean, regular velocity field and a low (similar to 80 km s(-1)) velocity dispersion. It traces regularly rotating gas in PG 1126-041, while in MR 2251-178 it is possibly associated with tidal debris from a recent merger or flyby. The other component is found to be extended up to a few kpc from the nuclei, and shows a high (similar to 800 km s(-1)) velocity dispersion and a blue-shifted mean velocity, as is expected from outflows driven by active galactic nuclei (AGN). We estimate mass outflow rates up to a few M-circle dot yr(-1) and kinetic efficiencies L-KIN/L-BOL between 1-4x10(-4), in line with those of galaxies hosting AGN of similar luminosities. The momentum rates of these ionised outflows are comparable to those measured for the UFOs at sub-pc scales, which is consistent with a momentum-driven wind propagation. Pure energy-driven winds are excluded unless about 100x additional momentum is locked in massive molecular winds. In comparing the outflow properties of our sources with those of a small sample of well-studied QSOs hosting UFOs from the literature, we find that winds seem to systematically lie either in a momentum-driven or an energy-driven regime, indicating that these two theoretical models bracket the physics of AGN-driven winds very well. |
Description: | The reduced datacubes are only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/cat/J/A+A/644/A15. |
URI: | http://hdl.handle.net/20.500.12666/423 |
E-ISSN: | 1432-0746 |
ISSN: | 0004-6361 |
Appears in Collections: | (CAB) Artículos |
Files in This Item:
File | Description | Size | Format | |
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aa38889-20.pdf | 2,81 MB | Adobe PDF | View/Open |
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