Discovery of a thin stellar stream in the SLAMS survey

Abstract

We report the discovery of a thin stellar stream - which we name the Jet stream - crossing the constellations of Hydra and Pyxis. The discovery was made in data from the SLAMS survey, which comprises deep $g$ and $r$ imaging for a $650$ square degree region above the Galactic disc performed by the CTIO Blanco + DECam. SLAMS photometric catalogues will be made publicly available. The stream is approximately 0.18 degrees wide and 10 degrees long, though it is truncated by the survey footprint. Its colour-magnitude diagram is consistent with an old, metal-poor stellar population at a heliocentric distance of approximately 29 kpc. We corroborate this measurement by identifying a spatially coincident overdensity of likely blue horizontal branch stars at the same distance. There is no obvious candidate for a surviving stream progenitor.

MNRAS accepted version

References in corpus (12)

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Cited by in corpus (12)

• Star Clusters Across Cosmic Time
• The DECam Local Volume Exploration Survey: Overview and First Data Release
• Snake in the Clouds: A new nearby dwarf galaxy in the Magellanic bridge
• galstreams: A Library of Milky Way Stellar Stream Footprints and Tracks
• Proper Motions of Stellar Streams Discovered in the Dark Energy Survey
• Modelling the Tucana III stream - a close passage with the LMC
• The Milky Way's stellar streams and globular clusters do not align in a Vast Polar Structure
• STREAMFINDER II: A possible fanning structure parallel to the GD-1 stream in Pan-STARRS1
• DELVE-ing into the Jet: a thin stellar stream on a retrograde orbit at 30 kpc
• Giant cold satellites from low-concentration haloes
• Towards characterizing dark matter subhalo perturbations in stellar streams with graph neural networks
• From the Fire: A Deeper Look at the Phoenix Stream