Hubble Space Telescope Proper motion (HSTPROMO) Catalogs of Galactic Globular Clusters. VI. Improved data reduction and internal-kinematic analysis of NGC 362

Abstract

We present an improved data-reduction technique to obtain high-precision proper motions (PMs) of globular clusters using Hubble Space Telescope data. The new reduction is superior to the one presented in the first paper of this series for the faintest sources in very crowded fields. We choose the globular cluster NGC 362 as a benchmark to test our new procedures. We measure PMs of 117 450 sources in the field, showing that we are able to obtain a PM precision better than 10 $\mu$as yr${}^{-1}$ for bright stars. We make use of this new PM catalog of NGC 362 to study the cluster's internal kinematics. We investigate the velocity-dispersion profiles of the multiple stellar populations hosted by NGC 362 and find new pieces of information on the kinematics of first- and second-generation stars. We analyze the level of energy equipartition of the cluster and find direct evidence for its post-core-collapsed state from kinematic arguments alone. We refine the dynamical mass of the blue stragglers and study possible kinematic differences between blue stragglers formed by collisions and mass transfer. We also measure no significant cluster rotation in the plane of the sky. Finally, we measure the absolute PM of NGC 362 and of the background stars belonging to the Small Magellanic Cloud, finding a good agreement with previous estimates in the literature. We make the PM catalog publicly available.

arXiv comment27 pages, 19 figures, 4 tables, accepted for publication in ApJ

References in corpus (57)

• emcee: The MCMC Hammer
• The Gaia mission
• Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties
• The Dartmouth Stellar Evolution Database
• New Understanding of Large Magellanic Cloud Structure, Dynamics and Orbit from Carbon Star Kinematics
• The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. I. Overview of the Project and Detection of Multiple Stellar Populations
• The ACS Survey of Galactic Globular Clusters. XII. Photometric Binaries along the Main-Sequence
• Third-Epoch Magellanic Cloud Proper Motions I: HST/WFC3 data and Orbit Implications
• The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. IX. The Atlas of Multiple Stellar Populations
• An ACS Survey of Globular Clusters V: Star Catalog for Each Cluster
• An Empirical Pixel-Based Correction for Imperfect CTE. I. HST's Advanced Camera for Surveys
• New Limits on an Intermediate Mass Black Hole in Omega Centauri: II. Dynamical Models
• A stellar census in globular clusters with MUSE: The contribution of rotation to cluster dynamics studied with 200 000 stars
• Dynamical age differences among coeval star clusters as revealed by blue stragglers
• Astrometry and photometry with HST WFC3. II. Improved geometric-distortion corrections for 10 filters of the UVIS channel
• Two distinct sequences of blue straggler stars in the globular cluster M30
• Hubble Space Telescope Proper Motion (HSTPROMO) Catalogs of Galactic Globular Clusters. I. Sample Selection, Data Reduction and NGC 7078 Results
• A Binary Origin for Blue Stragglers in Globular Clusters
• Hubble Space Telescope reveals multiple Sub-Giant Branch in eight Globular Clusters
• Hubble Space Telescope proper motion (HSTPROMO) catalogs of Galactic globular clusters. II. Kinematic profiles and maps
• The State-of-the-Art HST Astro-Photometric Analysis of the core of $\omega$ Centauri. I. The Catalog
• The ACS Survey of Galactic Globular Clusters. X. New Determinations of Centers for 65 Clusters
• M31 Transverse Velocity and Local Group Mass from Satellite Kinematics
• No Energy Equipartition in Globular Clusters
• Reaching the End of the White Dwarf Cooling Sequence in NGC 6791
• The HST large programme on $\omega$ Centauri - II. internal kinematics
• A Dynamical Signature of Multiple Stellar Populations in 47 Tucanae
• Double Blue Straggler sequences in GCs: the case of NGC 362
• Astrometry and photometry with HST-WFC3. I. Geometric distortion corrections of F225W, F275W, F336W bands of the UVIS-channel
• The Hubble Space Telescope UV Legacy Survey of galactic globular clusters. VI. The internal kinematics of the multiple stellar populations in NGC 2808
• A novel look at energy equipartition in globular clusters
• The puzzling dynamical status of the core of the globular cluster NGC 6752
• N-body Models of Rotating Globular Clusters
• Hubble Space Telescope proper motion (HSTPROMO) catalogs of Galactic globular clusters. III. Dynamical distances and mass-to-light ratios
• Hubble Space Telescope Proper Motion (HSTPROMO) Catalogs of Galactic Globular Clusters. V. The rapid rotation of 47 Tuc traced and modeled in three dimensions
• NGC 362: another globular cluster with a split red giant branch
• The State-of-the-Art HST Astro-Photometric Analysis of the core of ωCentauri. III. The Main Sequence's Multiple Populations Galore
• HST absolute Proper Motions of NGC 6681 (M70) and the Sagittarius Dwarf Spheroidal Galaxy
• Red Giants in the Small Magellanic Cloud. I. Disk and Tidal Stream Kinematics
• First Gaia Local Group Dynamics: Magellanic Clouds Proper Motion and Rotation
• Proper Motion Study of the Magellanic Clouds using SPM material
• The ACS Survey of Galactic Globular Clusters XIV: Bayesian Single-Population Analysis of 69 Globular Clusters
• Kinematical evolution of tidally limited star clusters: rotational properties
• A dynamical study of Galactic globular clusters under different relaxation conditions
• Globular clusters with Gaia
• The HST large programme on $\omega$ Centauri -- III. Absolute proper motion
• Hubble Space Telescope proper motion (HSTPROMO) catalogs of Galactic globular clusters. IV. Kinematic profiles and average masses of blue straggler stars
• The State-of-the-Art HST Astro-Photometric Analysis of the core of $\omega$ Centauri. II. Differential-Reddening Map
• On the Link Between Energy Equipartition and Radial Variation in the Stellar Mass Function of Star Clusters
• The Gaia-ESO Survey: Dynamical models of flattened, rotating globular clusters
• The VMC survey - XVII. The proper motion of the Small Magellanic Cloud and of the Milky Way globular cluster 47 Tucanae
• Deep HST Imaging in 47 Tucanae: A Global Dynamical Model
• Kinematic fingerprint of core-collapsed globular clusters
• Reversed radial distribution trend of subpopulations in the globular clusters NGC 362 and NGC 6723
• Formation and Evolution of Blue Stragglers in 47 Tucanae
• A ground-based proper motion study of twelve nearby Globular Clusters
• The VMC survey XXVIII. Improved measurements of the proper motion of the Galactic globular cluster 47 Tucanae

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• oMEGACat II -- Photometry and proper motions for 1.4 million stars in Omega Centauri and its rotation in the plane of the sky
• Empirical measurement of the dynamical ages of three globular clusters and some considerations on the use of the dynamical clock
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• Structure and Internal Kinematics of Nine Inner Milky Way Globular Clusters
• HSTPROMO Internal Proper Motion Kinematics of Dwarf Spheroidal Galaxies: I. Velocity Anisotropy and Dark Matter Cusp Slope of Draco
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• Hubble Space Telescope Proper Motion (HSTPROMO) Catalogs of Galactic Globular Clusters. VII. Energy Equipartition
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• oMEGACat. VI. Analysis of the overall kinematics of Omega Centauri in 3D: velocity dispersion, kinematic distance, anisotropy, and energy equipartition
• The absolute proper motions of the Arches and Quintuplet clusters
• A simple two-component description of energy equipartition and mass segregation for anisotropic globular clusters
• Energy equipartition in multiple-population globular clusters
• Correlation Between Mass Segregation and Structural Concentration in Relaxed Stellar Clusters
• Peeking beneath the precision floor -- II. Probing the chemo-dynamical histories of the potential globular cluster siblings, NGC 288 and NGC 362
• Towards Realistic Modeling of the Astrometric Capabilities of MCAO Systems: Detecting an Intermediate Mass Black Hole with MAVIS
• Kinematic complexity around NGC419: resolving the proper motion of the cluster, the Small Magellanic Cloud and the Magellanic Bridge
• Searching for new observational signatures of the dynamical evolution of star clusters
• A JWST project on 47 Tucanae: kinematics, energy equipartition and anisotropy of multiple populations
• Searching for exotic object companions in the dense core of NGC 362: a multi-wavelength and multi-epoch photometric analysis
• The internal kinematics of NGC 2808 and its multiple populations
• Bulge Fossil Fragments as a new population of factories of gravitational wave sources in the Galaxy
• The Origin of Young Stellar Populations in NGC 1783: Accretion of External Stars
• Internal Kinematics of M10 and M71
• Thirteen facts that you need to know on multiple populations in globular clusters
• Energy equipartition in Globular Clusters through the eyes of dynamical models
• Imprints of Evolution on the Internal Kinematics of Globular Clusters
• Long-term evolution of multimass rotating star clusters
• A simple two-component description of mass segregation for anisotropic globular clusters
• Using Binaries in Globular Clusters to Catch Sight of Intermediate-Mass Black Holes
• Globular clusters in the era of precision astrometry
• Evolution towards energy equipartition in star clusters: effects of the tidal field, primordial binaries, and internal velocity anisotropy