Details: |
A key question in galaxy evolution is understanding how galaxies completely stop (or “quench”) their star formation towards the end of their lifetime. In spite of having the fuel necessary for forming stars, the lack of detected star formation in old massive galaxies indicates the presence of a feedback energy. Active galactic nuclei (AGN) driven feedback has been proposed to be the most efficient feedback mechanism capable of suppressing star formation - but direct evidence of such feedback in typical galaxies has been lacking. In this talk, I will present evidence from a series of papers that a new class of early-type galaxies, known as ‘red geysers’, may represent AGN feedback in action. I will show that these low redshift galaxies host low luminosity radio mode AGNs with signatures of large scale ionized gas outflows. I will present a multi-wavelength study of these red geyser population from a variety of observational datasets and discuss their role in the global quenching of star formation. Finally, I will end by discussing the incredible amount of progress we will be able to make in detecting feedback and outflows from galaxies spanning a wide range of redshift using the James Webb Space Telescope. |