Study of dynamical status of the globular cluster NGC 1851 using Ultraviolet Imaging Telescope

Abstract

We present the study of dynamical status of the globular cluster NGC 1851. A combination of multiwavelength space and ground-based data sets are used for the present analysis. In order to select the genuine cluster members, we used the astro-photometric data available from HST and GAIA-DR2 catalogs. The BSS radial distribution of the cluster is plotted from the center of the cluster to the outskirts. The radial distribution of BSS shows a central peak, followed by a dip at the intermediate radii (rmin ~ 90'') and a rising trend in the outskirts. We also estimated A+rh parameter as 0.391 +/- 0.006 to validate the findings of the radial distribution study. On the basis of the minima in the BSS radial distribution and the value of A+rh parameter, we conclude that NGC 1851 belongs to Family II classification and is an intermediate dynamical state cluster.

9 pages, 8 figures, 2 tables, Accepted for publication in JOAA

References in corpus (17)

• The Gaia mission
• The propagation of uncertainties in stellar population synthesis modeling I: The relevance of uncertain aspects of stellar evolution and the IMF to the derived physical properties of galaxies
• The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. I. Overview of the Project and Detection of Multiple Stellar Populations
• Dynamical age differences among coeval star clusters as revealed by blue stragglers
• The double Subgiant Branch of NGC 1851: the role of the CNO abundance
• Homogeneous photometry VII. Globular clusters in the Gaia era
• Another Non-segregated Blue Straggler Population in a Globular Cluster: the Case of NGC 2419
• Investigating mass segregation process in globular clusters with Blue Straggler Stars: the impact of dark remnants
• Blue Straggler Stars in the Unusual Globular Cluster NGC 6388
• A Panchromatic Study of the Globular Cluster NGC 1904. I: The Blue Straggler Population
• The Blue Straggler Population of the Globular Cluster M5
• The surprising external upturn of the Blue Straggler radial distribution in M55
• In-orbit Performance of UVIT on ASTROSAT
• Spectral Energy Distribution of Blue Stragglers in the core of 47 Tucanae
• The Horizontal Branch population of NGC 1851 as revealed by the Ultra-violet Imaging Telescope (UVIT)
• The Blue Straggler population in the globular cluster M53 (NGC5024): a combined HST, LBT, CFHT study
• Peculiarities in the horizontal branch stars of globular cluster NGC 1851: Discovery of a Blue straggler companion to an EHB star