Abstract Details

Name: Snehalata Sahu
Affiliation: Indian Institute of Astrophysics
Conference ID: ASI2017_705
Title : UVIT Imaging of the globular cluster NGC 288
Authors and Co-Authors : Annapurni Subramaniam Indian Institute of Astrophysics
Abstract Type : Oral
Abstract Category : Stars,ISM and the Galaxy
Abstract : NGC 288 is a low density globular cluster located close to the Southern Galactic pole. It has a blue horizontal branch (HB) and also it is known to have the highest specific frequency of Blue Straggler Stars (BSS). Studying the HB and BSS is very useful in UV as they stand out from the cooler Main-Sequence and red giant stars. The UV properties of these populations is still not well known. We present the UVIT observations of NGC 288 in filters (F148W, F169M and N279N) with fairly large exposure times. We have performed crowded-field photometry on the UVIT images and created the UVIT Color-Magnitude Diagrams. We have fitted the CMDs with the isochrones generated for UVIT filters using the Flexible Stellar Population Synthesis (FSPS) model and derived the properties of different stellar populations in the cluster. We have identified different evolutionary sequences in the UVIT CMDs and compared it with GALEX CMDs, thus, showing the advantages of UVIT over GALEX.