Name: Olag Pratim Bordoloi
Affiliation: Tezpur University, Napaam, India
Conference ID : ASI2022_723
Title : Correlation between diffuse Far Ultraviolet and Infrared emissions from Holmberg II
Authors : Olag Pratim Bordoloi, P. shalima, Margarita Safonova, Rupjyoti Gogoi
Abstract Type: Poster
Abstract Category : Extragalactic Astronomy
Abstract : The main source of diffuse Far Ultraviolet (FUV) emission in galaxies is the scattering of starlight by the interstellar dust grains. Dust also absorbs shorter wavelength photons (UV, optical) and re-emits in the longer wavelengths, mainly in mid-infrared (MIR) and far-infrared (FIR) resulting in diffuse Infrared (IR) emission. These two processes of scattering and absorption are complementary and hence likely to result in FUV-IR correlations. We have observed the dwarf galaxy Holmberg II in FUV with AstroSat in 8 different epochs. Here, we present the correlation between FUV diffuse emission observed by AstroSat with the MIR and FIR diffuse emission observed by Spitzer Space Telescope in 7 different infrared bands. This correlation will enable us to determine the nature of dust particles contributing to the diffuse emission and also help to derive the distribution of dust and stars in the galaxy, which later can be used to model the FUV diffuse scattering from the galaxy.