Radio Mode Outbursts in Giant Elliptical Galaxies
Paul Nulsen (1), Christine Jones (1), William Forman (1), Eugene, Churazov (2, 3), Brian McNamara (4, 5), Laurence David (1), Stephen Murray, (1) ((1) CfA, (2) MPA, (3) IKI, (4) U Waterloo, (4) Perimeter)
TL;DR
This paper investigates how active galactic nuclei (AGN) outbursts influence the hot atmospheres of giant elliptical galaxies, demonstrating that these outbursts can prevent cooling and star formation, supporting radio mode feedback models.
Contribution
It provides observational evidence from Chandra data showing the impact of AGN outbursts on galaxy atmospheres and their role in regulating cooling and star formation.
Findings
AGN outbursts are powerful enough to prevent cooling flows.
Outbursts are intermittent with duty cycles increasing with galaxy size.
Supports radio mode feedback as a key process in galaxy evolution.
Abstract
Outbursts from active galactic nuclei (AGN) affect the hot atmospheres of isolated giant elliptical galaxies (gE's), as well as those in groups and clusters of galaxies. Chandra observations of a sample of nearby gE's show that the average power of AGN outbursts is sufficient to stop their hot atmospheres from cooling and forming stars, consistent with radio mode feedback models. The outbursts are intermittent, with duty cycles that increases with size.
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