Abstract Details
| Name: Chayan Mondal Affiliation: Indian Institute of Astrophysics Conference ID: ASI2018_737 Title : UVIT imaging of WLM: How clumpy are the young and hot star distribution in this metal poor galaxy? Authors and Co-Authors : Annapurni Subramaniam Indian Institute of Astrophysics Abstract Type : Poster Abstract Category : Extragalactic astronomy Abstract : We present ultra-violet study of the nearby dwarf irregular galaxy WLM with UVIT multi band observation. The galaxy at a distance 995 kpc, was observed in three UVIT filters F148W, N245M and N263M. We created two different color maps (F148W$-$N245M and F148W$-$N263M) to study the temperature morphology of young stellar complexes of the galaxy. We identified several complexes with temperature T $>$ 35000 K with size $\sim$ 10 - 50 pc. These are likely to be the OB associations present in the galaxy. The detected high temperature regions also show good spatial correlation with the H$\alpha$ emitting regions of the galaxy. The hottest core of each star forming clumps are found to be enveloped by regions with gradually decreasing temperature. The south western part of the galaxy shows many hot star forming regions, high level H$\alpha$ emission and low column density of H$~$I which altogether signifies a vigorous recent star forming event. The extreme northern part of the galaxy is found to be devoid of hot star forming regions. We also investigated the FUV disk of the galaxy and identified two main star forming complex in the galaxy. We further performed psf photometry to identify possible star clusters present in the galaxy and estimated their masses by using starburst99 SSP model. WLM is likely to have a large fraction of low mass clusters with mass M $< 10^3 M_{\odot}$. |