Abstract Details
| Name: Snehalata Sahu Affiliation: Indian Institute of Astrophysics Conference ID: ASI2016_705 Title : Galactic Globular Clusters: Revealing the UV properties using GALEX and HST Observations Authors and Co-Authors : Annapurni Subramaniam and Indian Institute of Astrophysics Abstract Type : Poster Abstract Category : Stars, The Milky Way Galaxy and its neighbours Abstract : We have selected four globular clusters(GCs) NGC 1851, NGC 5466, M5 and M10 to study the UV properties of Blue Straggler stars (BSS) and Horizontal Branch Stars (HB). These clusters have unique horizontal Branch and differ in their BSS population. Since identification of BSS in GCs are hampered by crowding due to main-sequence stars and red giants, switching to UV wavelength helps in detecting BSS in the central regions. We present the UV color-magnitude diagrams (CMDs) of four clusters which is obtained by doing the PSF photometry on the GALEX FUV and NUV images. By combining these with HST ACS observations, we have obtained the color magnitude diagrams in FUV, NUV and V, for the first time. The comparison of the UV CMDs with optical CMDs shows a variety of horizontal branch and blue straggler morphologies. |