Abstract Details
| Name: Chayan Mondal Affiliation: IIA, Bengaluru Conference ID: ASI2019_462 Title : UVIT view of IC 2574 : Are the star formation driven by expanding and colliding shells? Authors and Co-Authors : Chayan Mondal, Annapurni Subramaniam, Koshy George Abstract Type : Oral Abstract Category : Extragalactic Astronomy Abstract : We present a deep FUV imaging study of a nearby dwarf irregular galaxy IC 2574 using the Ultraviolet Imaging Telescope (UVIT). We identified 38 FUV bright star forming regions in the galaxy and explored their connection with the present H~I shells. The FUV emission is mostly found to be co-located with the average H~I surface density more than $10^{21} cm^{-2}$. The size and mass of the identified single star forming clumps are found to have a range between 40 - 220 pc and $10^4 - 10^6 M_{\odot}$ respectively. We report two resolved components for the remnant cluster of shell 35 and estimated their masses. The star formation rate of IC 2574 is found to be 0.57 $M_{\odot}$/yr, which is slightly higher compared to the average value of nearby dwarf irregular galaxies. We found $\sim$ 90\% of the star forming regions to be present either along the rim of an H~I shell or in between multiple shells which suggests the expansion or collision of present H~I shells driving the star formation. |