The Magellanic Stream and Debris Clouds

Abstract

We present a study of the discrete clouds and filaments in the Magellanic Stream using a new high-resolution survey of neutral hydrogen (\HI) conducted with H75 array of the Australia Telescope Compact Array, complemented by single-dish data from the Parkes Galactic All-Sky Survey (GASS). From the individual and combined datasets, we have compiled a catalog of 251 clouds and list their basic parameters, including a morphological description useful for identifying cloud interactions. We find an unexpectedly large number of head-tail clouds in the region. The implication for the formation mechanism and evolution is discussed. The filaments appear to originate entirely from the Small Magellanic Cloud and extend into the northern end of the Magellanic Bridge.

Manuscript format, 40 pages, 17 figures, 2 tables. Accepted for publication in ApJ

References in corpus (46)

• The Leiden/Argentine/Bonn (LAB) Survey of Galactic HI: Final data release of the combined LDS and IAR surveys with improved stray-radiation corrections
• New Understanding of Large Magellanic Cloud Structure, Dynamics and Orbit from Carbon Star Kinematics
• Are the Magellanic Clouds on their First Passage about the Milky Way?
• Third-Epoch Magellanic Cloud Proper Motions I: HST/WFC3 data and Orbit Implications
• GASS: The Parkes Galactic All-Sky Survey. I. Survey Description, Goals, and Initial Data Release
• The Role of Dwarf Galaxy Interactions in Shaping the Magellanic System and Implications for Magellanic Irregulars
• Thermal condensation in a turbulent atomic hydrogen flow
• Distances and Metallicities of High- and Intermediate-Velocity Clouds
• N-body Simulations of the Small Magellanic Cloud and the Magellanic Stream
• The Proper Motion of the Large Magellanic Cloud using HST
• The Magellanic Stream, High-Velocity Clouds and the Sculptor Group
• Is the SMC Bound to the LMC? The HST Proper Motion of the SMC
• The Origin of the Magellanic Stream and Its Leading Arm
• The disruption of nearby galaxies by the Milky Way
• A New Look at the Large-Scale HI Structure of the LMC
• The Parkes HI Survey of the Magellanic System
• The Origin of the Magellanic Stream
• GASS: The Parkes Galactic All-Sky Survey. II. Stray-Radiation Correction and Second Data Release
• The Tidal Origin of the Magellanic Stream and the Possibility of a Stellar Counterpart
• HIPASS High-Velocity Clouds: Properties of the Compact and Extended Populations
• The 200 Degree-Long Magellanic Stream System
• The gravitational and hydrodynamical interaction between the LMC and the Galaxy
• The Fate of High-Velocity Clouds: Warm or Cold Cosmic Rain?
• N-body simulations of the Magellanic Stream
• Duchamp: a 3D source finder for spectral-line data
• The Source of Ionization along the Magellanic Stream
• The Metallicity and Dust Content of HVC 287.5+22.5+240: Evidence for a Magellanic Clouds Origin
• Metal Abundances in the Magellanic Stream
• Exploring the Origin and Fate of the Magellanic Stream with Ultraviolet and Optical Absorption
• FUSE Observations of Atomic Abundances and Molecular Hydrogen in the Leading Arm of the Magellanic Stream
• Where are the high velocity clouds?
• The COS/UVES Absorption Survey of the Magellanic Stream: II. Evidence for a complex enrichment history of the Stream from the Fairall 9 sightline
• The COS/UVES Absorption Survey of the Magellanic Stream: I. One-Tenth Solar Abundances along the Body of the Stream
• An automated search for high-velocity clouds in the Leiden/Dwingeloo Survey
• The evolution of interstellar clouds in a streaming hot plasma including heat conduction
• The many streams of the Magellanic Stream
• Galaxies undergoing ram-pressure stripping: the influence of the bulge on morphology and star formation rate
• Implications of Recent Measurements of the Milky Way Rotation for the Orbit of the Large Magellanic Cloud
• Head-Tail Clouds: Drops to Probe the Diffuse Galactic Halo
• Effelsberg HI observations of compact high-velocity clouds
• The four leading arms of the Magellanic Cloud system
• The scattered debris of the Magellanic Stream
• GASS High Velocity Clouds in the Region of the Magellanic Leading Arm
• The Effect of Drag from the Galactic Hot Halo on the Magellanic Stream and Leading Arm
• Do High-Velocity Clouds trace the Dark Matter subhalo population?
• Basic Testing of the Duchamp Source Finder

Cited by in corpus (25)

• HI4PI: A full-sky HI survey based on EBHIS and GASS
• WALLABY -- An SKA Pathfinder HI Survey
• The Magellanic Stream: Circumnavigating the Galaxy
• Ram Pressure Stripping of the Large Magellanic Cloud's Disk as a Probe of the Milky Way's Circumgalactic Medium
• The Magellanic Stream System: I. Ram-pressure tails and the relics of the collision between the Magellanic Clouds
• The Magellanic Stream at 20 kpc: A New Orbital History for the Magellanic Clouds
• Toward a Complete Understanding of the Magellanic Stream Formation
• Tests of Dark MACHOs: Lensing, Accretion, and Glow
• Discovery of a disrupting open cluster far into the Milky Way halo: a recent star formation event in the leading arm of the Magellanic stream?
• Revealing the Ionization Properties of the Magellanic Stream using Optical Emission
• Models of rotating coronae
• Kinematics of the Magellanic Stream and Implications for its Ionization
• WALLABY Pre-Pilot Survey: HI Content of the Eridanus Supergroup
• Discovery of Magellanic Stellar Debris in the H3 Survey
• Attack of the Flying Snakes : Formation of Isolated HI Clouds By Fragmentation of Long Streams
• Radiative Turbulent Mixing Layers and the Survival of Magellanic Debris
• Misalignment between cold gas and stellar components in early-type galaxies
• The Distance and Properties of Hydrogen Clouds in the Leading Arm of the Magellanic System
• Cold HI ejected into the Magellanic Stream
• Exploring Hydrodynamic Instabilities along the Infalling High-Velocity Cloud Complex A
• Young stars raining through the Galactic Halo: the nature and orbit of Price-Whelan 1
• Investigating the Baryon Cycle in Interacting Dwarfs with the Very Large Array and Pan-STARRS
• The Long Tails of the Pegasus-Pisces Arch Intermediate Velocity Cloud
• Hydrodynamics of Clustered Clouds: Drafting, Survival, Condensation, and Ablation
• A Search for 3-mm Molecular Absorption Line Transitions in the Magellanic Stream