| Name: | Saili Kumari Keshri |
| Affiliation: | Senior Research Fellow, Indian Institute of Astrophysics |
| Conference ID : | ASI2024_179 |
| Title : | Evolution of Stellar bars in interacting galaxies with triple AGN |
| Authors : | Saili K. Keshri 1,2, Sudhanshu Barway 1, Jyoti Yadav 1,2, Mousumi Das 1, Francoise Combes 3
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| Authors Affiliation: | Saili K. Keshri, Sudhanshu Barway, Jyoti Yadav, Mousumi Das Affliation (Indian Institute of Astrophysics, Kormangala II Block, Bengaluru- 560034, India).
Saili K. Keshri, Jyoti Yadav Affliation (Department of Physics, Pondicherry University, R.V.Nagar, Kalapet, Puducherry- 605014, India).
Francoise Combes Affliation (Observatoire de Paris, LERMA, College de France, CNRS, PSL University, Sorbonne University, F-75014 Paris, France). |
| Mode of Presentation: | Poster |
| Abstract Category : | Galaxies and Cosmology |
| Abstract : | In the nearby universe, the interactions between galaxies have been observed to influence the evolution of galaxies significantly. Such interaction between galaxies, especially those with large reserves of cold gas, often led to fuel star formation with increased AGN activity and morphological distortions compared to their isolated counterparts. Studying galaxy interaction using an Integral Field Spectrograph (IFS) can help us to study spatially resolved star formation activities in different components of galaxies.
We present a comprehensive investigation of a group of interacting barred galaxies with a triple AGN system using MUSE IFS to study the increased star formation in various regions of galaxies along with UV imaging from UVIT. Our study uncovers a remarkable dichotomy. While one of the galaxies exhibits active star formation along its stellar bar, the other does not, marking a unique finding in its category. Stellar bars within galaxies are typically considered long-lived structures predominantly composed of old stellar populations. The galaxy that hosts LINER nuclei shows reasonable star formation along the bar. In contrast, the other type II Seyfert host galaxy shows a quenching of star formation along the bar. We conclude that the interaction has triggered gas inflow, resulting in star formation along the bar in one galaxy and activating the AGN in the other, subsequently quenching star formation along its bar. The presence of star-forming regions within old stellar bars poses an interesting puzzle, prompting us to explore the evolutionary study of stellar bars in a sample of interacting galaxies. |
