Discovery of extreme [O III] λ5007 Å outflows in high-redshift red quasars
| Autor: | Isabelle Pâris, Nicholas P. Ross, Fred Hamann, Rachael M. Alexandroff, Michael A. Strauss, Carolin Villforth, Dominika Wylezalek, W. N. Brandt, Nadia L. Zakamska, Jenny E. Greene |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Physics
Very Large Telescope evolution quasars: emission lines quasars: general [galaxies] 010308 nuclear & particles physics Star formation Astrophysics::High Energy Astrophysical Phenomena Doubly ionized oxygen FOS: Physical sciences Astronomy Astronomy and Astrophysics Quasar Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics - Astrophysics of Galaxies 01 natural sciences Redshift Galaxy Luminosity Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) 0103 physical sciences Galaxy formation and evolution Astrophysics::Solar and Stellar Astrophysics 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics |
| Zdroj: | Zakamska, N L, Hamann, F, Pâris, I, Brandt, W N, Greene, J E, Strauss, M A, Villforth, C, Wylezalek, D, Alexandroff, R M & Ross, N P 2016, ' Discovery of extreme [O III] λ5007 Å outflows in high-redshift red quasars ', Monthly Notices of the Royal Astronomical Society, vol. 459, pp. 3144-3160 . https://doi.org/10.1093/mnras/stw718 |
| DOI: | 10.1093/mnras/stw718 |
| Popis: | Black hole feedback is now a standard component of galaxy formation models. These models predict that the impact of black hole activity on its host galaxy likely peaked at z=2-3, the epoch of strongest star formation activity and black hole accretion activity in the Universe. We used XShooter on the Very Large Telescope to measure rest-frame optical spectra of four z~2.5 extremely red quasars with infrared luminosities ~10^47 erg/sec. We present the discovery of very broad (full width at half max= 2600-5000 km/sec), strongly blue-shifted (by up to 1500 km/sec) [OIII]5007A emission lines in these objects. In a large sample of obscured and red quasars, [OIII] kinematics are positively correlated with infrared luminosity, and the four objects in our sample are on the extreme end both in [OIII] kinematics and infrared luminosity. We estimate that ~3% of the bolometric luminosity in these objects is being converted into the kinetic power of the observed wind. Photo-ionization estimates suggest that the [OIII] emission might be extended on a few kpc scales, which would suggest that the extreme outflow is affecting the entire host galaxy of the quasar. These sources may be the signposts of the most extreme form of quasar feedback at the peak epoch of galaxy formation, and may represent an active "blow-out" phase of quasar evolution. 18 pages, accepted to MNRAS |
| Databáze: | OpenAIRE |
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