Tails and streams around the Galactic globular clusters NGC1851, NGC1904, NGC2298 and NGC2808

Abstract

We present DECam imaging for the peculiar Galactic globular clusters NGC1851, NGC1904 (M79), NGC2298 and NGC2808. Our deep photometry reveals that all the clusters have an important contribution of stars beyond their King tidal radii and present tails with different morphologies. We have also explored the surroundings of the clusters where the presence of the Canis Major overdensity and/or the low Galactic latitude Monoceros ring at d~8kpc is evident. A second stellar system is found at d~17kpc and spans at least 18deg x 15deg in the sky. As one of the possible scenarios to explain that feature, we propose that the unveiled system is part of Monoceros explained as a density wave moving towards the outer Milky Way. Alternatively, the unveiled system might be connected with other known halo substructures or associated with the progenitor dwarf galaxy of NGC1851 and NGC1904, which are widely considered accreted globular clusters.

15 pages, 9 figures and 3 tables. Accepted for publication by MNRAS

References in corpus (36)

• The Dartmouth Stellar Evolution Database
• The Radial Velocity Experiment (RAVE): first data release
• The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. I. Overview of the Project and Detection of Multiple Stellar Populations
• Outer structure of the Galactic warp and flare: explaining the Canis Major over-density
• The ACS Survey of Galactic Globular Clusters. III. The Double Subgiant Branch of NGC 1851
• Rings and Radial Waves in the Disk of the Milky Way
• The Hercules-Aquila Cloud
• The outer halo globular cluster system of M31 - I. The final PAndAS catalogue
• Forensics of Subhalo-Stream Encounters: The Three Phases of Gap Growth
• The IPHAS Catalogue of Halpha Emission Line Sources in the Northern Galactic Plane
• The outer halo globular cluster system of M31 - II. Kinematics
• Kinematic Decoupling of Globular Clusters with Extended Horizontal-Branch
• A New Catalog of Globular Clusters in the Milky Way
• Spiral structure of the Third Galactic Quadrant and the solution to the Canis Major debate
• Space Velocities of Southern Globular Clusters. V. A Low Galactic Latitude Sample
• Flare in the Galactic stellar outer disc detected in SDSS-SEGUE data
• Galactic halo stellar structures in the Triangulum-Andromeda region
• The Complex Structure of Stars in the Outer Galactic Disk as revealed by Pan-STARRS1
• The halo+cluster system of the Galactic globular cluster NGC1851
• A search for stellar tidal debris of defunct dwarf galaxies around globular clusters in the inner Galactic halo
• The ACS Survey of Galactic Globular Clusters XIV: Bayesian Single-Population Analysis of 69 Globular Clusters
• Lithium abundances in globular cluster giants: NGC 1904, NGC 2808, and NGC 362
• Exploring Halo Substructure with Giant Stars: The Nature of the Triangulum-Andromeda Stellar Features
• Spectroscopic Signatures of Extra-Tidal Stars Around the Globular Clusters NGC 6656 (M22), NGC 3201 and NGC 1851 from RAVE
• No Excess of RR Lyrae Stars in the Canis Major Overdensity
• Chemical abundances of giant stars in NGC 5053 and NGC 5634, two globular clusters associated with the Sagittarius dwarf Spheroidal galaxy?
• The globular cluster AM 4: yet another young globular associated with the Sgr Dwarf Spheroidal galaxy?
• A comprehensive view of the Virgo Stellar Stream
• The discovery of tidal tails around the globular cluster NGC 7492 with Pan-STARRS1
• An Approximate Analytic Model of a Star Cluster with Potential Escapers
• Uncovering Multiple Populations with Washington Photometry: I. The Globular Cluster NGC 1851
• Does the Second Caustic Ring of Dark Matter Cause the Monoceros Ring of Stars ?
• NGC2298: a globular cluster on its way to disruption
• A Canis Major over-density imaging survey. I. Stellar content and star-count maps : A distinctly elongated body of main sequence stars
• Disentangling the Virgo Overdensity with RR Lyrae stars
• A Megacam Survey of Outer Halo Satellites. IV. Two foreground populations possibly associated with the Monoceros substructure in the direction of NGC2419 and Koposov2

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• Reverse engineering the Milky Way
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• The eye of Gaia on globular clusters structure: tidal tails
• Dynamical Evolution of Multiple-Population Globular Clusters
• Uncovering a 260 pc wide, 35 Myr old filamentary relic of star formation
• On the tidal tails of Milky Way globular clusters
• The Pristine survey -- VII. A cleaner view of the Galactic outer halo using blue horizontal branch stars
• Detection of open cluster rotation fields from Gaia EDR3 proper motions
• Extra-tidal structures around the Gaia Sausage candidate globular cluster NGC6779 (M56)
• Signatures of tidal disruption in the Milky Way globular cluster NGC 6981 (M72)
• The search for extratidal star candidates around Galactic globular clusters NGC 2808, NGC 6266, and NGC 6397 with {\textit{Gaia}} DR2 astrometry
• A MegaCam Survey of Outer Halo Satellites. VII. A Single Sérsic Index v/s Effective Radius Relation for Milky Way Outer Halo Satellites
• The disruption of the low-mass globular cluster E3
• Multiple Stellar Populations outside the tidal radius of NGC1851 through Gaia DR3 XP Spectra
• RR Lyrae Stars In Stellar Streams with Gaia: The Escapers