30 Du Bois Scholars Program The Connection Between Molecular Gas, Star Formation, and Radio-Mode AGN Feedback in Local Galaxies

Authors:

Nia Freeman, Sarah Biddle

Date Created:

2025-01-01

Course Title:

Professor:

Not specified

About Paper:

Active galactic nuclei (AGN), luminous compact centers of line ratios of log([NII]/H▯ 6584▯) and log([OIII]/H▯ 5007▯) to galaxies with supermassive black holes accreting matter, emit distinguish between AGN and star-forming driven winds via BPT non-stellar radiation across radio, gamma, optical, UV, X-ray, diagnostics. microwave, and infrared wavelengths. Models have shown that radio-modeAGNprovidesfeedbackthatsuppressesstarformation: LoFAR data provided radio images of the 16 galaxies mapping locations of potential radio jets. Radio-optical overlays were jets of plasma eject from the supermassive black hole which heat created to align radio emissions and optical features, identifying and disturb surrounding gas in the interstellar medium, quenching outflow sources (AGN vs. star formation). We found outflow star formation. signatures in a high fraction of galaxies, supporting AGN feedback To test this, 16 radio-loud galaxies (LOFAR 150MHz frequencies) is an important mechanism in galaxy evolution. Future works will wereselectedfromtheMaNGAsurveyataredshiftbetween0.024- analyze molecular gas via CO(1-0) observations of our sample, 0.05. Using MaNGA data we: detected ionized gas outflows, which detected emission in 4 out of the 16 galaxies. mapped star-forming regions, and analyzed optical emission

Abstract:

Active galactic nuclei (AGN), luminous compact centers of line ratios of log([NII]/H▯ 6584▯) and log([OIII]/H▯ 5007▯) to galaxies with supermassive black holes accreting matter, emit distinguish between AGN and star-forming driven winds via BPT non-stellar radiation across radio, gamma, optical, UV, X-ray, diagnostics. microwave, and infrared wavelengths. Models have shown that radio-modeAGNprovidesfeedbackthatsuppressesstarformation: LoFAR data provided radio images of the 16 galaxies mapping locations of potential radio jets. Radio-optical overlays were jets of plasma eject from the supermassive black hole which heat created to align radio emissions and optical features, identifying and disturb surrounding gas in the interstellar medium, quenching outflow sources (AGN vs. star formation). We found outflow star formation. signatures in a high fraction of galaxies, supporting AGN feedback To test this, 16 radio-loud galaxies (LOFAR 150MHz frequencies) is an important mechanism in galaxy evolution. Future works will wereselectedfromtheMaNGAsurveyataredshiftbetween0.024- analyze molecular gas via CO(1-0) observations of our sample, 0.05. Using MaNGA data we: detected ionized gas outflows, which detected emission in 4 out of the 16 galaxies. mapped star-forming regions, and analyzed optical emission

Source:

Harvard / Talia Ford, Elysia Larson / 2025

Topics:

radio, galaxy, star, agn, gas, formation, optical, emission, outflow, molecular, feedback, log

Co-authors:

@niafreeman160 , @sarahbiddle161