The Close AGN Reference Survey (CARS): No evidence of galaxy-scale hot outflows in two nearby AGN⋆
2018
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.
Keywords:
- Correction
- Source
- Cite
- Save
- Machine Reading By IdeaReader
108
References
3
Citations
NaN
KQI