Abstract Details
| Name: Sanmesh Deshmukh Affiliation: Birla Institute of Technology and Science, Pilani Conference ID: ASI2025_298 Title : Study of an open cluster Berkeley 21 using UVIT/AstroSat Authors and Co-Authors : Sanmesh Deshmukh 1, Anju Panthi 1, Kaushar Vaidya 1 Abstract Type : Poster Abstract Category : Stars, Interstellar Medium, and Astrochemistry in Milky Way Abstract : We present the study of an intermediate age (~ 2.18 Gyr) open cluster, Berkeley 21, located at a distance of 5 kpc towards the Galactic anticentre direction using ∼ UVIT/AstroSat data along with the other multiwavelength archival data. It is possibly the lowest metallicity ([Fe/H] = -1.3 dex) object in the open cluster sample studied. We ∼ apply a machine learning algorithm, ML-MOC, on Gaia DR3 data, and identify 325 cluster members, out of which we detect nine sources in UVIT/F172M filter on performing the PSF photometry. These nine sources include three blue straggler stars, five main-sequence stars, and one red clump star. We will construct the multiwavelength spectral energy distributions of these sources in order to characterize them and discover the hot companions associated with them, if any. The characterization of the hot companions will then be used to determine their nature and unravel the formation channels of the above- mentioned objects. |