At a Crossroads: Stellar Streams in the South Galactic Cap
  We examine the distribution of old, metal-poor stars in a portion of the
recently released PanSTARRs survey. We find an interesting confluence of four
new cold stellar stream candidates that appear to converge on or pass near the
south Galactic pole. The stream candidates, which we designate Murrumbidgee,
Molonglo, Orinoco, and Kwando, lie at a distance of approximately 20 kpc and
range in length from 13 to 95 degrees, or about 5 to 33 kpc. The stream
candidates are between 100 and 300 pc in width, and are estimated to contain
between 3000 and 8000 stars each, suggesting progenitors similar to modern day
globular clusters. The trajectories of the streams imply orbits that range from
hyperbolic to nearly circular. The Molonglo stream is nearly parallel to, at
the same distance as, and offset by only 2.5 degrees from the previously
discovered ATLAS stream, suggesting a possible common origin. Orinoco and
Kwando also have similarly shaped, moderately eccentric, obliquely viewed
orbits that suggest distinct progenitors within a common, larger parent body.
