| 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: | Sanmesh Deshmukh 1, Anju Panthi 1, Kaushar Vaidya 1 |
| Authors Affiliation: | Department of Physics, Birla Institute of Technology and Science Pilani, Pilani Campus |
| Mode of Presentation: | 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. |
