Abstract Details

Name: Aishrila Mazumder
Affiliation: Indian Institute of Technology Indore
Conference ID: ASI2021_408
Title : Study of the Lockman Hole Region at 325 MHz
Authors and Co-Authors : Aishrila Mazumder (Discipline of Astronomy, Astrophysics and Space Engineering, Indian Institute of Technology Indore, India), Abhirup Datta (Discipline of Astronomy, Astrophysics and Space Engineering, Indian Institute of Technology Indore, India)
Abstract Type : Poster
Abstract Category : Extragalactic Astronomy
Abstract : This work presents the characterization of astrophysical sources in the Lockman Hole region using 325-MHz data from the Giant Metrewave Radio Telescope. A 6deg X 6deg map with RMS reaching 50 microJy per beam is produced. Source catalogue with the Euclidean normalized differential source counts have been derived from it, consistent with previous observations as well as simulations. The angular power spectrum (APS) of the diffuse Galactic synchrotron emission is determined for three different Galactic latitudes using the tapered gridded estimator. The values of the APS lie between ∼1 and ∼100 mK^2 . Fitting a power law of the form Al^(-b) gives values of A and b varying across the latitudes considered. This work demonstrates, for the first time, the behaviour of the diffuse emission at very high Galactic locations. It follows the same trend that is seen at locations near the Galactic plane, thus emphasising the need for low-frequency observations to develop better models of the diffuse emission.