A Spatially Resolved Survey of Distant Quasar Host Galaxies. I. Dynamics of Galactic Outflows
Abstract
We present observations of ionized gas outflows in 11 z = 1.39–2.59 radio-loud quasar host galaxies. Data were taken with the integral field spectrograph OSIRIS and the adaptive optics system at the W.M. Keck Observatory targeting nebular emission lines (Hβ, [O III], Hα, [N II], and [S II]) redshifted into the near-infrared (1–2.4 μm). Outflows with velocities of 500–1700 km s⁻¹ are detected in 10 systems on scales ranging from <1 kpc to 10 kpc with outflow rates from 8–2400 M_⊙ yr⁻¹ . For five sources, the outflow momentum rates are 4–80 times LAGN/c, consistent with outflows being driven by an energy-conserving shock. The five other outflows are either driven by radiation pressure or an isothermal shock. The outflows are the dominant source of gas depletion, and we find no evidence for star formation along the outflow paths. For eight objects, the outflow paths are consistent with the orientation of the jets. Yet, given the calculated pressures, we find no evidence of the jets currently doing work on these galactic-scale ionized outflows. We find that galactic-scale feedback occurs well before galaxies establish a substantial fraction of their stellar mass, as expected from local scaling relationships.
Additional Information
© 2021. The American Astronomical Society. Received 2020 February 24; revised 2021 June 14; accepted 2021 June 16; published 2021 October 1. The authors thank Jim Lyke, Randy Campbell, and other SAs with their assistance at the telescope to acquire the Keck OSIRIS data sets. We thank the anonymous referee for their constructive comments that helped improve the manuscript. The data presented herein were obtained at the W.M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W.M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. This research has made use of the NASA/IPAC Extragalactic Database (NED) which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. Software: OSIRIS DRP (Larkin et al. 2013), CASA (McMullin et al. 2007), PyNeb (Luridiana et al. 2015), Matplotlib (Hunter 2007), SciPy (Virtanen et al. 2020), NumPy (Harris et al. 2020), Astropy (Astropy Collaboration et al. 2018).Attached Files
Published - Vayner_2021_ApJ_919_122.pdf
Accepted Version - 2106.08337.pdf
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Additional details
- Eprint ID
- 111432
- Resolver ID
- CaltechAUTHORS:20211014-170552591
- W. M. Keck Foundation
- NASA/JPL/Caltech
- Canadian Institute for Theoretical Astrophysics
- Created
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2021-10-18Created from EPrint's datestamp field
- Updated
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2021-10-18Created from EPrint's last_modified field
- Caltech groups
- Infrared Processing and Analysis Center (IPAC)