A tangle of stellar streams in the north Galactic cap

Abstract

Stellar halo substructures were identified using statistical photometric parallax of blue main sequence turnoff stars from fourteen Sloan Digital Sky Survey stripes in the north Galactic cap. Four structures are consistent with previous measurements of the Sagittarius dwarf tidal stream: the leading tail, the "bifurcated" stream, the trailing tail, and Stream C. The stellar overdensity in Virgo, about 15 kpc from the Sun, could arise from the crossing of the Parallel Stream and a new, candidate stream dubbed the Perpendicular Stream. The data suggests the presence of a wide stream near NGC 5466, with a distance of 5 to 15 kpc. Measurements of the flattening of the smooth stellar halo from the fourteen stripes average q=0.58, with a dispersion of 0.04.

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Cited by in corpus (5)

• galstreams: A Library of Milky Way Stellar Stream Footprints and Tracks
• The Milky Way's Shell Structure Reveals the Time of a Radial Collision
• The Local Stellar Halo is Not Dominated by a Single Radial Merger Event
• The Virgo Overdensity Explained
• RR Lyrae Stars In Stellar Streams with Gaia: The Escapers