MUSE-AO view of the starburst-AGN connection: NGC 7130
| Autor: | Sébastien Comerón, M. K. Seidel, Johan H. Knapen |
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| Rok vydání: | 2018 |
| Předmět: |
Physics
Jet (fluid) 010308 nuclear & particles physics FOS: Physical sciences Astronomy and Astrophysics Field of view Astrophysics Radius Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics - Astrophysics of Galaxies 01 natural sciences Galaxy Wavelength Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) 0103 physical sciences Dispersion (optics) Outflow Adaptive optics 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics |
| Zdroj: | Astronomy & Astrophysics |
| DOI: | 10.48550/arxiv.1812.00809 |
| Popis: | We present the discovery of a small kinematically decoupled core of 0.2$^{\prime\prime}$ (60 pc) in radius as well as an outflow jet in the archetypical AGN-starburst "composite" galaxy NGC 7130 from integral field data obtained with the adaptive optics-assisted MUSE-NFM instrument on the VLT. Correcting the already good natural seeing at the time of our science verification observations with the four-laser GALACSI AO system, we reach an unprecedented spatial resolution at optical wavelengths of around 0.15$^{\prime\prime}$. We confirm the existence of star-forming knots arranged in a ring of 0.58$^{\prime\prime}$ (185 pc) in radius around the nucleus, previously observed from UV and optical Hubble Space Telescope and CO(6-5) ALMA imaging. We determine the position of the nucleus as the location of a peak in gas velocity dispersion. A plume of material extends towards the NE from the nucleus until at least the edge of our field of view at 2$^{\prime\prime}$ (640 pc) radius which we interpret as an outflow jet originating in the AGN. The plume is not visible morphologically, but is clearly characterised in our data by emission-line ratios characteristic of AGN emission, enhanced gas velocity dispersion, and distinct non-circular gas velocities. Its orientation is roughly perpendicular to the line of nodes of the rotating host galaxy disc. A circumnuclear area of positive and negative velocities of 0.2$^{\prime\prime}$ in radius indicates a tiny inner disc, which can only be seen after combining the integral field spectroscopic capabilities of MUSE with adaptive optics. Comment: Accepted for publication in A&A letters |
| Databáze: | OpenAIRE |
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