Abstract Details
| Name: | Smitha Subramanian |
| Affiliation: | Indian Institute of Astrophysics |
| Conference ID : | ASI2024_887 |
| Title : | Effect of low-mass galaxy interactions on their star formation |
| Authors : | Smitha Subramanian, Chayan Mondal, Venu Kalari, Rakshit Chauhan |
| Authors Affiliation: | Smitha Subramanian, Indian Institute of Astrophysics, Bangalore - 560034, India Chayan Mondal, Inter-University Centre for Astronomy and Astrophysics, Ganeshkhind, Post Bag 4, Pune 411007, India Venu Kalari, Gemini Observatory, NSF NOIRLab, Casilla 603, La Serena, Chile Rakshit Chauhan, Indian Institute of Astrophysics, Bangalore - 560034, India |
| Mode of Presentation: | Invited |
| Abstract Category : | Galaxies and Cosmology |
| Abstract : | According to the Λ cold dark matter model of galaxy formation, the hierarchical assembly process is scale-free and interactions between galaxies in all mass ranges are expected. The effects of interactions between dwarf galaxies on their evolution are not well understood. In this study, we aim to understand the effect of low-mass galaxy interactions on their star formation rate (SFR). We estimated the SFR of 22 interacting and 36 single gas-rich dwarf galaxies in the Lynx-Cancer void region using their far-ultraviolet (FUV) images from the GALEX mission. We find an enhancement in SFR by a factor of 3.4 ± 1.2 for interacting systems compared to single dwarf galaxies in the stellar mass range of 10^7–10^8 solar mass . Our results indicate that dwarf–dwarf galaxy interactions can lead to an enhancement in their SFR. These observations are similar to the predictions based on the simulations of dwarf galaxies at lower redshifts. This study provides the first quantitative insights into the nature of interactions of dwarf galaxies in the sub-10^8 solar mass regime and increases the small number of interacting dwarfs in the local Universe studied in the FUV . I will present the results from this study (Reference: https://doi.org/10.1051/0004-6361/202346536, arXiv:2310.02595). I will also discuss the preliminary results from our ongoing follow-up study of 11 dwarf galaxies (7 interacting and 4 non-interacting) using the deeper and higher-spatial-resolution UV data from the Ultraviolet Imaging Telescope, to understand the effect of dwarf galaxy interactions on the spatial distribution of star forming clumps and tidal tails. |