Abstract Details
| Name: Abhisek Mohapatra Affiliation: Dept. Of Physics, NIT Rourkela Conference ID: ASI2016_805 Title : Study of Structure of Our Galaxy Using Ultra-violet Star Counts of GALEX Survey. Authors and Co-Authors : Ananta C. Pradhan (National Institute of Technology, Rourkela, Odisha 769008, India) D. K. Ojha (Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005, India) A. C. Robin (Institut Utinam, CNRS UMR 6213, Universite de Franche-Comte, France) S. K. Ghosh (National Centre for Radio Astrophysics, Pune 411007, India) Abstract Type : Poster Abstract Category : Stars, The Milky Way Galaxy and its neighbours Abstract : We have analyzed the entire GALEX catalog to identify the UV stellar point sources by using the IR colour cut method (J-W1 < 1.2, W1 is a WISE band at 3.4 micron and J is a 2MASS band) (Pradhan et al. 2014). We compared the observed star counts with Besancon model of stellar population synthesis. We then identified the white dwarf candidates (WDs) of the disk and blue horizontal branch star candidates (BHBs) of halo from the observed sample by selecting suitable UV colour (FUV - NUV) ranges. We have produced catalogs and made quantitative estimates of the space densities of these objects in our Galaxy. The Besancon model has also been developed to predict star counts in the UV passbands of the UVIT which will be very useful to separate out different stellar populations and to estimate the structural parameters of the Galaxy with better precision. |