The scattered debris of the Magellanic Stream

Abstract

Searching the HI Parkes All-Sky Survey (HIPASS) and its northern extension, we detected a population of very compact high-velocity clouds (HVCs) with similar velocities in the Galactic standard-of-rest frame which appear to be arranged in several filaments aligned with the nearby Magellanic Stream. A comparison with published OVI/CaII absorption and HI emission line measurements suggests that the HVCs are condensations within an extended and mainly ionised component of the Magellanic Stream. They coincide in position with a faint gas stream predicted in numerical simulations of the Magellanic Clouds by Gardiner & Noguchi (1996). Consequently, the Magellanic Stream could be much more extended than generally believed.

arXiv comment5 pages, 4 figures, accepted for publication in MNRAS

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• The Magellanic Stream: Circumnavigating the Galaxy
• The COS/UVES Absorption Survey of the Magellanic Stream. III: Ionization, Total Mass, and Inflow Rate onto the Milky Way
• The Disruption and Fueling of M33
• Magellan/M2FS Spectroscopy of Tucana 2 and Grus 1
• Exploring the Origin and Fate of the Magellanic Stream with Ultraviolet and Optical Absorption
• GASKAP -- The Galactic ASKAP Survey
• The COS/UVES Absorption Survey of the Magellanic Stream: I. One-Tenth Solar Abundances along the Body of the Stream
• Relics of structure formation: extra-planar gas and high-velocity clouds around the Andromeda Galaxy
• Gas Accretion onto the Milky Way
• The Vela Cloud: A Giant HI Anomaly in the NGC 3256 Group
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• The Magellanic Stream and Debris Clouds
• Revealing the Ionization Properties of the Magellanic Stream using Optical Emission
• Evidence of ram pressure stripping of WLM, a dwarf galaxy far away from any large host galaxy
• The Effect of Drag from the Galactic Hot Halo on the Magellanic Stream and Leading Arm
• Warm gas accretion onto the Galaxy
• A Compact High Velocity Cloud near the Magellanic Stream: Metallicity and Small-Scale Structure