The ESO-VLT MIKiS survey reloaded: velocity dispersion profile and rotation curve of NGC 1904

Abstract

We present an investigation of the internal kinematic properties of M79 (NGC 1904). Our study is based on radial velocity measurements obtained from the ESO-VLT Multi-Instrument Kinematic Survey (MIKiS) of Galactic globular clusters for more than 1700 individual stars distributed between $\sim 0.3^{\prime \prime }$ and $770^{\prime \prime }$ ($\sim 14$ three-dimensional half-mass radii), from the center. Our analysis reveals the presence of ordered line-of-sight rotation with a rotation axis almost aligned along the East-West direction and a velocity peak of $1.5$ km s${}^{-1}$ at $\sim 70^{\prime \prime }$ from the rotation axis. The velocity dispersion profile is well described by the same King model that best fits the projected density distribution, with a constant central plateau at ${\sigma }_0\sim 6$ km s${}^{-1}$. To investigate the cluster rotation in the plane of the sky, we have analyzed the proper motions provided by the Gaia EDR3, finding a signature of rotation with a maximum amplitude of $\sim 2.0$ km s${}^{-1}$ at $\sim 80^{\prime \prime }$ from the cluster center. Analyzing the three-dimensional velocity distribution, for a sub-sample of 130 stars, we confirm the presence of systemic rotation and find a rotation axis inclination angle of $37$° with respect to the line-of-sight. As a final result, the comparison of the observed rotation curves with the results of a representative N-body simulation of a rotating star cluster shows that the present-day kinematic properties of NGC 1904 are consistent with those of a dynamically old system that has lost a significant fraction of its initial angular momentum.

arXiv comment30 pages, 20 figures, 8 tables, accepted for publication in ApJ

References in corpus (73)

• The Demography of Massive Dark Objects in Galaxy Centres
• Gaia Early Data Release 3: The astrometric solution
• A 2MASS All-Sky View of the Sagittarius Dwarf Galaxy: I. Morphology of the Sagittarius Core and Tidal Arms
• Gaia Early Data Release 3: Photometric content and validation
• The formation of massive black holes through collision runaway in dense young star clusters
• Resolved Massive Star Clusters in the Milky Way and its Satellites: Brightness Profiles and a Catalogue of Fundamental Parameters
• Gaia Data Release 2: Kinematics of globular clusters and dwarf galaxies around the Milky Way
• A catalogue of masses, structural parameters and velocity dispersion profiles of 112 Milky Way globular clusters
• Gaia EDR3 view on Galactic globular clusters
• Gaia Early Data Release 3 -- Catalogue validation
• Accurate distances to Galactic globular clusters through a combination of Gaia EDR3, HST and literature data
• The Data Processing Pipeline for the MUSE Instrument
• Dynamical Formation of Close Binary Systems in Globular Clusters
• The giant, horizontal and asymptotic branches of galactic globular clusters. I. The catalog, photometric observables and features
• The dynamical distance and intrinsic structure of the globular cluster omega Centauri
• Twenty-One Millisecond Pulsars in Terzan 5 Using the Green Bank Telescope
• A Keck/DEIMOS spectroscopic survey of faint Galactic satellites: searching for the least massive dwarf galaxies
• MOCCA Code for Star Cluster Simulations - IV. A new Scenario for Intermediate Mass Black Hole Formation in Globular Clusters
• Internal Kinematics of the Fornax Dwarf Spheroidal Galaxy
• 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
• Accreted versus In Situ Milky Way Globular Clusters
• Two distinct sequences of blue straggler stars in the globular cluster M30
• Star count density profiles and structural parameters of 26 Galactic globular clusters
• The dynamical M/L-profile and distance of the globular cluster M15
• Homogeneous photometry VII. Globular clusters in the Gaia era
• Blue Straggler Stars: a direct comparison of Star counts and population ratios in six Galactic Globular Clusters
• The velocity dispersion profile of NGC 6388 from resolved-star spectroscopy: no evidence of a central cusp and new constraints on the black hole mass
• Limits on intermediate-mass black holes in six Galactic globular clusters with integral-field spectroscopy
• Rotating Globular Clusters
• New density profile and structural parameters of the complex stellar system Terzan 5
• The eye of Gaia on globular clusters kinematics: internal rotation
• Blue Stragglers, Young White Dwarfs and UV-excess stars in the core of 47 Tuc
• The Horizontal Branch in the UV Colour Magnitude Diagrams. II. The case of M3, M13 and M79
• MUSE crowded field 3D spectroscopy of over 12,000 stars in the globular cluster NGC 6397 - II. Probing the internal dynamics and the presence of a central black hole
• Central rotations of Milky Way Globular Clusters
• N-body Models of Rotating Globular Clusters
• The surface density profile of NGC 6388: a good candidate for harboring an intermediate-mass black hole
• 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
• MIKiS: the Multi-Instrument Kinematic Survey of Galactic Globular Clusters. I. Velocity dispersion profiles and rotation signals of 11 globular clusters
• Hubble Space Telescope Proper Motion (HSTPROMO) Catalogs of Galactic Globular Clusters. V. The rapid rotation of 47 Tuc traced and modeled in three dimensions
• The non-peculiar velocity dispersion profile of the stellar system omega Centauri
• Velocity anisotropy in tidally limited star clusters
• Cluster kinematics and stellar rotation in NGC 419 with MUSE and adaptive optics
• The VLT-FLAMES Tarantula Survey VI: Evidence for rotation of the young massive cluster R136
• Self-consistent models of quasi-relaxed rotating stellar systems
• Comparative study between N-body and Fokker-Planck simulations for rotating star clusters - II. 2-component models
• Discovery of three new millisecond pulsars in Terzan 5
• Testing Newtonian gravity with distant globular clusters: NGC1851 and NGC1904
• A VLT/FLAMES study of the peculiar intermediate-age Large Magellanic Cloud star cluster NGC 1846 - I. Kinematics
• Evidence of tidal distortions and mass loss from the old open cluster NGC 6791
• Lithium abundances in globular cluster giants: NGC 1904, NGC 2808, and NGC 362
• Kinematical evolution of tidally limited star clusters: rotational properties
• The strong rotation of M5 (NGC 5904) as seen from the MIKiS Survey of Galactic Globular Clusters
• 2D Fokker-Planck models of rotating clusters
• The optical counterpart to the X-ray transient IGR J18245-2452 in the globular cluster M28
• The optical companion to the binary millisecond pulsar J1824-2452H in the globular cluster M28
• Radio timing and optical photometry of the black widow system PSR J1518+0204C in the globular cluster M5
• A kinematic view of NGC 1261: structural parameters, internal dispersion, absolute proper motion and Blue Straggler Stars
• The "dynamical clock": dating the internal dynamical evolution of star clusters with Blue Straggler Stars
• PSR J1641+3627F: a low-mass He white dwarf orbiting a possible high-mass neutron star in the globular cluster M13
• Star density profiles of six old star clusters in the Large Magellanic Cloud
• 3D core kinematics of NGC 6362: central rotation in a dynamically evolved globular cluster
• First phase space portrait of a hierarchical stellar structure in the Milky Way
• The ESO Multi-Instrument Kinematic Survey (MIKiS) of Galactic Globular Clusters: solid body rotation and anomalous velocity dispersion profile in NGC 5986
• The fingerprint of binary intermediate mass black holes in globular clusters: supra-thermal stars and angular momentum alignment
• A new identity card for the bulge globular cluster NGC 6440 from resolved star counts
• The Optical Counterpart to the Accreting Millisecond X-ray Pulsar SAX J1748.9-2021 in the Globular Cluster NGC 6440
• The Luminosity Function and stellar Mass to Light ratio of the massive globular cluster NGC2419
• Weighing stars: the identification of an Evolved Blue Straggler Star in the globular cluster 47 Tucanae
• A complete census of $H\alpha$ emitters in NGC 6397
• MUSE narrow field mode observations of the central kinematics of M15