Journal
NATURE ASTRONOMY
Volume 6, Issue 3, Pages 339-+Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41550-021-01561-3
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Funding
- National Natural Science Foundation of China [12073007, 11763001]
- Guangxi Natural Science Foundation [2019GXNSFFA245008, GKAD19245136, 2018GXNSFAA050001]
- Scientific Research Project of Guangxi University for Nationalities [2018KJQD01]
- USTC Research Funds of the Double First-Class Initiative [YD 3440002001]
- National Science Foundation of China [11721303, 11991052]
- National Key R&D Program of China [2016YFA0400702]
- Alfred P. Sloan Foundation
- U.S. Department of Energy Office of Science
- Brazilian Participation Group
- Carnegie Institution for Science
- Carnegie Mellon University
- Center for Astrophysics | Harvard Smithsonian
- Chilean Participation Group
- French Participation Group
- Instituto de Astrofisica de Canarias
- Johns Hopkins University
- Kavli Institute for the Physics and Mathematics of the Universe (IPMU)/University of Tokyo
- Korean Participation Group
- Lawrence Berkeley National Laboratory
- Leibniz Institut fur Astrophysik Potsdam (AIP)
- Max-Planck-Institut fur Astronomie (MPIA Heidelberg)
- Max-Planck-Institut fur Astrophysik (MPA Garching)
- Max-Planck-Institut fur Extraterrestrische Physik (MPE)
- National Astronomical Observatories of China
- New Mexico State University
- New York University
- University of Notre Dame
- Observatario Nacional/MCTI
- Ohio State University
- Pennsylvania State University
- Shanghai Astronomical Observatory
- United Kingdom Participation Group
- Universidad Nacional Autonoma de Mexico
- University of Arizona
- University of Colorado Boulder
- University of Oxford
- University of Portsmouth
- University of Utah
- University of Virginia
- University of Washington
- University of Wisconsin
- Vanderbilt University
- Yale University
- Center for High Performance Computing at the University of Utah
- [NSFC-11903031]
- [12192221]
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By comparing the star formation rate in quasar hosts with different types of broad absorption lines, researchers found that the rate decreases from low-ionization BAL quasars to high-ionization BAL quasars, and then increases from high-ionization BAL quasars to non-BAL quasars. This suggests a negative global feedback effect of quasar outflows on galaxy evolution.
Both theory and observations suggest that outflows driven by an active central supermassive black hole have a feedback effect on shaping the global properties of the host galaxy 1-8 . However, whether feedback from the outflow is effective, and if so, whether it is positive or negative, have long been controversial. Here, using the latest catalogue from the Sloan Digital Sky Survey, we use the flux ratio of the [O-II] to [Ne-V] emission lines as a proxy to compare the star formation rate in the hosts of quasars with different types of broad absorption lines (BALs): low-ionization (Lo)BAL, high-ionization (Hi)BAL and non-BAL. We find that the star formation rate decreases from LoBAL to HiBAL quasars, and then increases from HiBAL to non-BAL quasars. Assuming that the sequence of LoBAL to HiBAL to non-BAL represents evolution, our results are consistent with a quenching and subsequent rebound of star formation in quasar host galaxies. This phenomenon can be explained by suppression of the star formation rate by the outflow and then rebound of the rate once the outflow disappears as the quasars evolve from HiBALs to non-BALs. Our result suggests that the quasar outflow has a negative global feedback on galaxy evolution.
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