Abstract Details

Name: Aditi Vijayan
Affiliation: RRI
Conference ID: ASI2017_974
Title : Understanding Radio Emission Using Simulations
Authors and Co-Authors : Kartick Chandra Sarkar, RRI & Joint Astronomy Programme and Department of Physics, Indian Institute of Science, Bangalore 560012 Biman B. Nath, RRI Prateek Sharma, Indian Institute of Science, Bangalore
Abstract Type : Poster
Abstract Category : Extragalactic astronomy
Abstract : Diffuse radio emission is one of the signatures of star formation in spiral galaxies. While the total radio luminosity of a galaxy is related to its star formation rate, the spatial extent of the radio ‘halo’ depends on the surface density of star formation rate, its spatial distribution and disc parameters of the spiral galaxy. The extent of the synchrotron emission in our Galaxy is also crucial for the interpretation of the recently detected excess in the background radiation in radio wavelength. Observations suggest that there is a correlation between the extent of the radio halo of star forming spiral galaxies and that of the star forming region in the disc. We study the underlying processes related to the extended radio emission with the help of numerical hydrodynamical simulation. We use a 3D set-up of a disc galaxy wherein the mass and energy injection follow the density distribution in the disc. Using this, we study the correlation of the extent of the radio halo and disk parameters.