The Close AGN Reference Survey (CARS). No evidence of galaxy-scale hot outflows in two nearby AGN

DOI: 
10.1051/0004-6361/201833424
Publication date: 
01/10/2018
Main author: 
Powell, M. C.
IAA authors: 
Pérez-Torres, M.
Authors: 
Powell, M. C.;Husemann, B.;Tremblay, G. R.;Krumpe, M.;Urrutia, T.;Baum, S. A.;Busch, G.;Combes, F.;Croom, S. M.;Davis, T. A.;Eckart, A.;O'Dea, C. P.;Pérez-Torres, M.;Scharwächter, J.;Smirnova-Pinchukova, I.;Urry, C. M.
Journal: 
Astronomy and Astrophysics
Refereed: 
Yes
Publication type: 
Article
Volume: 
618
Pages: 
A27
Abstract: 
<BR /> Aims: We probe the radiatively-efficient, hot wind feedback mode in two nearby luminous unobscured (type 1) AGN from the Close AGN Reference Survey (CARS), which show intriguing kpc-scale arc-like features of extended [O III]ionized gas as mapped with VLT-MUSE. We aimed to detect hot gas bubbles that would indicate the existence of powerful, galaxy-scale outflows in our targets, HE 0227-0931 and HE 0351+0240, from deep (200 ks) Chandra observations. <BR /> Methods: By measuring the spatial and spectral properties of the extended X-ray emission and comparing with the sub kpc-scale IFU data, we are able to constrain feedback scenarios and directly test if the ionized gas is due to a shocked wind. <BR /> Results: No extended hot gas emission on kpc-scales was detected. Unless the ambient medium density is low (n <SUB>H</SUB> ̃ 1 cm<SUP>-3</SUP> at 100 pc), the inferred upper limits on the extended X-ray luminosities are well below what is expected from theoretical models at matching AGN luminosities. <BR /> Conclusions: We conclude that the highly-ionized gas structures on kpc scales are not inflated by a hot outflow in either target, and instead are likely caused by photoionization of pre-existing gas streams of different origins. Our nondetections suggest that extended X-ray emission from an AGN-driven wind is not universal, and may lead to conflicts with current theoretical predictions. The scientific results reported in this article are based on observations made by the Chandra X-ray Observatory (PI: G. Tremblay, ID: 17700519), and on observations collected at the European Organization for Astronomical Research in the Southern Hemisphere under ESO program(s) 094.B-0345(A) (PI: B. Husemann).
Database: 
ADS
SCOPUS
URL: 
https://ui.adsabs.harvard.edu/#abs/2018A&A...618A..27P/abstract
ADS Bibcode: 
2018A&A...618A..27P
Keywords: 
galaxies: active;galaxies: evolution;Astrophysics - Astrophysics of Galaxies