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

Powell, M. C., Husemann, B., Tremblay, G. R., Krumpe, M., Urrutia, T., Baum, S. A., Busch, G., Combes, F., Croom, S. M., Davis, Timothy, Eckart, A., O’Dea, C. P., Pérez-Torres, M., Scharwächter, J., Smirnova-Pinchukova, I. and Urry, C. M. 2018. The Close AGN Reference Survey (CARS): No evidence of galaxy-scale hot outflows in two nearby AGN. Astronomy and Astrophysics 618 , A27. 10.1051/0004-6361/201833424

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Abstract

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. 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. Results. No extended hot gas emission on kpc-scales was detected. Unless the ambient medium density is low nH ~1 cm 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. 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 photo-ionization of pre-existing gas streams of different origins. Our non-detections suggest that extended X-ray emission from an AGN-driven wind is not universal, and may lead to conflicts with current theoretical predictions.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Publisher: EDP Sciences
ISSN: 0004-6361
Funders: STFC
Date of First Compliant Deposit: 3 July 2018
Date of Acceptance: 30 June 2018
Last Modified: 05 Feb 2019 15:30
URI: http://orca.cf.ac.uk/id/eprint/112933

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