| Name: | Rakshit Chauhan |
| Affiliation: | Indian Institute of Astrophysics |
| Conference ID: | ASI2025_250 |
| Title: | Effect of interaction on the star forming properties of dwarf galaxies |
| Authors: | Rakshit Chauhan, Smitha Subramanian, Deepak A. Kudari |
| Authors Affiliation: | 1 Rakshit Chauhan, Smitha Subramanian (Indian Institute of Astrophysics, Bangalore - 560034, India)
2 Deepak A. Kudari (Indian Institute of Science Education and Research, KOLKATA - 741246, India) |
| Mode of Presentation: | Oral |
| Abstract Category: | Galaxies and Cosmology |
| Abstract: | One of the key drivers of galaxy evolution is interaction between galaxies and these interactions are expected to occur among galaxies of all mass range. Although dwarf galaxies constitute the most dominant population of galaxies across all redshifts, and majority of mergers are expected among them, studies exploring the effects of interactions in these systems are rare compared to that of massive galaxies.
In this context, we have conducted a FUV study for a large sample of 6176 dwarf galaxies (195
interacting and 5981 non-interacting isolated galaxies within the stellar mass range of 10^7–10^10M⊙
and redshift range of 0.00 – 0.12) using GALEX archival data in order to understand the impact of
dwarf-dwarf interactions on their star formation. We find clear evidence for enhanced star formation rate in interacting dwarfs with respect to their non-interacting counterparts when compared across different stellar mass and redshift bins. Further, in order to understand the effect of interactions on the spatial distribution and properties of star-forming clumps in interacting dwarfs, we performed a FUV study of 26 dwarfs (19 interacting and 7 non-interacting) undergoing different stages of interactions in stellar mass range of 10^6 − 10^8M⊙, in the Lynx Cancer Void, using higher resolution UVIT observations (∼ 3 times better spatial resolution than GALEX). Enhancement in star formation rate and star formation rate density for the clumps in the interacting dwarfs compared to the non-interacting galaxies was observed. We also find clear indications of star formation in tidal tails/bridges between interacting galaxies. In this talk, I will present the results from these studies and discuss future prospects using multi-wavelength studies to understand the overall evolution of low-mass galaxies.
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