A Monte Carlo analysis of the velocity dispersion of the globular cluster Palomar 14

Abstract

We present the results of a detailed analysis of the projected velocity dispersion of the globular cluster Palomar 14 performed using recent high-resolution spectroscopic data and extensive Monte Carlo simulations. The comparison between the data and a set of dynamical models (differing in fraction of binaries, degree of anisotropy, mass-to-light ratio M/L, cluster orbit and theory of gravity) shows that the observed velocity dispersion of this stellar system is well reproduced by Newtonian models with a fraction of binaries f_b<30% and a M/L compatible with the predictions of stellar evolution models. Instead, models computed with a large fraction of binaries systematically overestimate the cluster velocity dispersion. We also show that, across the parameter space sampled by our simulations, models based on the Modified Newtonian Dynamics theory can be reconciled with observations only assuming values of M/L lower than those predicted by stellar evolution models under standard assumptions.

arXiv comment13 pages, 13 figures, accepted for publication by ApJ

References in corpus (38)

• Stellar population synthesis at the resolution of 2003
• The Initial Mass Function of Stars: Evidence for Uniformity in Variable Systems
• Evolution of asymptotic giant branch stars II. Optical to far-infrared isochrones with improved TP-AGB models
• The Galactic disk mass function: reconciliation of the HST and nearby determinations
• Resolved Massive Star Clusters in the Milky Way and its Satellites: Brightness Profiles and a Catalogue of Fundamental Parameters
• Destruction of the Galactic Globular Cluster System
• Inverse Dynamical Population Synthesis and Star Formation
• Modified Newtonian Dynamics in the Milky Way
• The Disruption of the Sagittarius Dwarf Galaxy.
• The Dynamics of Sinking Satellites Around Disk Galaxies: A Poor Man's Alternative to High-Resolution Numerical Simulations
• Effects of Tidal Shocks on the Evolution of Globular Clusters
• N-body simulations of gravitational dynamics
• Star Clusters in M31: V. Internal Dynamical Trends: Some Troublesome, Some Reassuring
• On the Self-Consistent Response of Stellar Systems to Gravitational Shocks
• Peculiarities in Velocity Dispersion and Surface Density Profiles of Star Clusters
• The globular cluster NGC 2419: a crucible for theories of gravity
• The velocity dispersion and mass-to-light ratio of the remote halo globular cluster NGC 2419
• Revisiting the influence of unidentified binaries on velocity dispersion measurements in ultra-faint stellar systems
• Testing Fundamental Physics with Distant Star Clusters: Analysis of Observational Data on Palomar 14
• Discovery of tidal tails around the distant globular cluster Palomar 14
• The fraction of binary systems in the core of five Galactic open clusters
• The White Dwarf Deficit in Open Clusters: Dynamical Processes
• The evolution of the stellar mass function in star clusters
• Direct N-body simulations of globular clusters: (I) Palomar 14
• Mass-to-Light Ratios for M31 Globular Clusters: Age-Dating and a Surprising Metallicity Trend
• Globular Clusters in the Outer Galactic Halo: AM-1 and Palomar 14
• Testing fundamental physics with distant star clusters: theoretical models for pressure-supported stellar systems
• What a Local Sample of Spectroscopic Binaries can tell us about the Field-Binary Population
• The non-segregated population of blue straggler stars in the remote globular cluster Palomar 14
• Polytropic model fits to the globular cluster NGC 2419 in Modified Newtonian Dynamics
• NBSymple, a double parallel, symplectic N-body code running on Graphic Processing Units
• Globular clusters in modified Newtonian dynamics: velocity-dispersion profiles from self-consistent models
• Current data on the globular cluster Palomar 14 are not inconsistent with MOND
• Distant star clusters of the Milky Way in MOND
• Radial-orbit instability in modified Newtonian dynamics
• Palomar 13: a velocity dispersion inflated by binaries ?
• Is the distant globular cluster Pal 14 in a deep-freeze?
• Dwarf Galaxies, MOND, and Relativistic Gravitation

Cited by in corpus (13)

• Modified Newtonian Dynamics (MOND): Observational Phenomenology and Relativistic Extensions
• Primordial Black Holes from Inflaton Fragmentation into Oscillons
• NGC 6535: the lowest mass Milky Way globular cluster with a Na-O anti-correlation? Cluster mass and age in the multiple population context
• Asymmetrical tidal tails of open star clusters: stars crossing their cluster's prah challenge Newtonian gravitation
• Characterizing a cluster's dynamic state using a single epoch of radial velocities
• The velocity dispersion and mass function of the outer halo globular cluster Palomar 4
• Positrons from Primordial Black Hole Microquasars and Gamma-ray Bursts
• The Luminosity Function and stellar Mass to Light ratio of the massive globular cluster NGC2419
• Mass segregation in the outer halo globular cluster Palomar 14
• Mergers, tidal interactions, and mass exchange in a population of disc globular clusters: II. Long-term evolution
• Multiple stellar population mass loss in massive Galactic globular clusters
• The MOND External Field Effect on the Dynamics of the Globular Clusters: General Considerations and Application to NGC 2419
• Testing QUMOND theory with Galactic globular clusters in a weak external field