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.

arXiv comment9 pages, 8 figures, 2 tables, Accepted for publication in JOAA

References in corpus (36)

• Gaia Data Release 2. Summary of the contents and survey properties
• 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 Photometric Performance and Calibration of the HST Advanced Camera For Surveys
• The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. I. Overview of the Project and Detection of Multiple Stellar Populations
• Internal Dynamics of Globular Clusters
• The Updated BaSTI Stellar Evolution Models and Isochrones: I. Solar Scaled Calculations
• In-orbit Calibrations of the Ultra-Violet Imaging Telescope
• Dynamical age differences among coeval star clusters as revealed by blue stragglers
• The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters - XVII. Public Catalogue Release
• The double Subgiant Branch of NGC 1851: the role of the CNO abundance
• Star count density profiles and structural parameters of 26 Galactic globular clusters
• Homogeneous photometry VII. Globular clusters in the Gaia era
• The pure non-collisional Blue Straggler population in the giant stellar system omega Centauri
• Blue Stragglers, Young White Dwarfs and UV-excess stars in the core of 47 Tuc
• Discovery of another peculiar radial distribution of Blue Stragglers in Globular Clusters: The case of 47 Tuc
• 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
• The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters - XV. The dynamical clock: reading cluster dynamical evolution from the segregation level of blue straggler stars
• A Panchromatic Study of the Globular Cluster NGC 1904. I: The Blue Straggler Population
• The Blue Straggler Population of the Globular Cluster M5
• The small Blue Straggler star population in the dense Galactic Globular Cluster NGC 6752
• The surprising external upturn of the Blue Straggler radial distribution in M55
• The non-segregated population of blue straggler stars in the remote globular cluster Palomar 14
• The "UV-route" to search for Blue Straggler Stars in Globular Clusters: first results from the HST UV Legacy Survey
• In-orbit Performance of UVIT on ASTROSAT
• Hubble Space Telescope proper motion (HSTPROMO) catalogs of Galactic globular clusters. IV. Kinematic profiles and average masses of blue straggler stars
• The Unimodal Distribution Of Blue Straggler Stars in M75 (NGC 6864)
• 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
• The Horizontal Branch of NGC 1851: Constraints from its RR Lyrae Variables
• UVIT-HST-GAIA view of NGC 288: A census of hot stellar population and their properties from UV
• The radial distribution of Blue stragglers in Galactic Globular Cluster NGC 6656 $-$ Clues on the dynamical status