Quantifying the AGN-driven outflows in ULIRGs (QUADROS) – II. Evidence for compact outflow regions from HST [O III] imaging observations
| Autor: | M. A. Berg, Clive Tadhunter, C. Ramos Almeida, Dan Batcheldor, H. W. W. Spoon, William B. Sparks, J. Rodríguez Zaurín, R. A. W. Spence, Marco Chiaberge, M. Rose |
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| Rok vydání: | 2018 |
| Předmět: |
Physics
010308 nuclear & particles physics Astrophysics::High Energy Astrophysical Phenomena Spatially resolved media_common.quotation_subject Doubly ionized oxygen FOS: Physical sciences Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Astrophysics - Astrophysics of Galaxies 01 natural sciences Galaxy Universe Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) Hubble space telescope 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics Outflow Spectroscopy 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics media_common |
| Zdroj: | Monthly Notices of the Royal Astronomical Society. 478:1558-1569 |
| ISSN: | 1365-2966 0035-8711 |
| DOI: | 10.1093/mnras/sty1064 |
| Popis: | The true importance of the warm, AGN-driven outflows for the evolution of galaxies remains uncertain. Measurements of the radial extents of the outflows are key for quantifying their masses and kinetic powers, and also establishing whether the AGN outflows are galaxy-wide. Therefore, as part of a larger project to investigate the significance of warm, AGN-driven outflows in the most rapidly evolving galaxies in the local universe, here we present deep Hubble Space Telescope ( HST) narrow-band [OIII]$��$5007 observations of a complete sample of 8 nearby ULIRGs with optical AGN nuclei. Combined with the complementary information provided by our ground-based spectroscopy, the HST images show that the warm gas outflows are relatively compact for most of the objects in the sample: in three objects the outflow regions are barely resolved at the resolution of HST ($0.065 < R_{[OIII]} < 0.12$ kpc); in a further four cases the outflows are spatially resolved but with flux weighted mean radii in the range $0.65 < R_{[OIII]} < 1.2$ kpc; and in only one object (Mrk273) is there clear evidence for a more extended outflow, with a maximum extent of $R_{[OIII]}\sim5$ kpc. Overall, our observations show little evidence for the galaxy-wide outflows predicted by some models of AGN feedback. 14 pages, 3 figures, accepted for publication in MNRAS |
| Databáze: | OpenAIRE |
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