Quasar outflow deceleration or acceleration: predictions and a search

Quasar outflow deceleration or acceleration: predictions and a search

ABSTRACT Quasar winds can shock and sweep up ambient interstellar medium (ISM) gas, contributing to galactic quenching. We combine and extend past models of energy-conserving shock bubbles around quasars, investigate model implications from an observational standpoint, and test model predictions usi...

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Veröffentlicht in:Monthly notices of the Royal Astronomical Society 2024-02, Vol.528 (4), p.6496-6516
Hauptverfasser: Hall, P B, Weiss, E, Brandt, W N, Mulholland, C J
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creator Hall, P B
Weiss, E
Brandt, W N
Mulholland, C J
description ABSTRACT Quasar winds can shock and sweep up ambient interstellar medium (ISM) gas, contributing to galactic quenching. We combine and extend past models of energy-conserving shock bubbles around quasars, investigate model implications from an observational standpoint, and test model predictions using new high-resolution spectroscopic observations of the broad absorption-line quasar SDSS J030000.56+004828.0 (J0300). Even with constant energy input from the wind, a bubble’s expansion decelerates over time as more ISM gas is swept up. Our new observations enable a direct search for this deceleration. We obtain the tightest reported 3σ limit on the average rest-frame deceleration (or acceleration) of a quasar outflow: |a| < 0.1 km s−1 yr−1 (
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title Quasar outflow deceleration or acceleration: predictions and a search
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