Positive AGN feedback in the outskirts of nearby barred spiral galaxies?
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| Format: | Preprint |
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2025
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| _version_ | 1866914253653409792 |
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| author | Ananthamoorthy, Bannanje Bhattacharya, Debbijoy Sreekumar, P. |
| author_facet | Ananthamoorthy, Bannanje Bhattacharya, Debbijoy Sreekumar, P. |
| contents | Observational evidence regarding the impact of AGN feedback on star formation (SF) in non-jetted galaxies is limited. With the available high-resolution UV observations from AstroSat-UVIT, complemented by GALEX, we studied the SF properties in the outskirts ($>0.5R_{25}$) of six AGN-host galaxies and compared them with four non-AGN galaxies of similar morphology. We observed a higher SF rate density ($Σ_{\text{SFR}}$) for the UV knots in AGN-host galaxies, and it falls off less rapidly compared to non-AGN galaxies, suggesting positive AGN feedback in the outskirts of AGN-host galaxies. Additionally, FUV attenuation (A$_{\text{FUV}}$) is also enhanced in the outer regions and falls less rapidly in AGN-host compared to non-AGN, indicating that the feedback could be coupled with dust. We speculate that the radiation-pressure-driven and/or wind mode AGN feedback could be at play even in low-luminosity nearby AGN-host galaxies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_14257 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Positive AGN feedback in the outskirts of nearby barred spiral galaxies? Ananthamoorthy, Bannanje Bhattacharya, Debbijoy Sreekumar, P. Astrophysics of Galaxies Observational evidence regarding the impact of AGN feedback on star formation (SF) in non-jetted galaxies is limited. With the available high-resolution UV observations from AstroSat-UVIT, complemented by GALEX, we studied the SF properties in the outskirts ($>0.5R_{25}$) of six AGN-host galaxies and compared them with four non-AGN galaxies of similar morphology. We observed a higher SF rate density ($Σ_{\text{SFR}}$) for the UV knots in AGN-host galaxies, and it falls off less rapidly compared to non-AGN galaxies, suggesting positive AGN feedback in the outskirts of AGN-host galaxies. Additionally, FUV attenuation (A$_{\text{FUV}}$) is also enhanced in the outer regions and falls less rapidly in AGN-host compared to non-AGN, indicating that the feedback could be coupled with dust. We speculate that the radiation-pressure-driven and/or wind mode AGN feedback could be at play even in low-luminosity nearby AGN-host galaxies. |
| title | Positive AGN feedback in the outskirts of nearby barred spiral galaxies? |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2511.14257 |