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.
@article{arxiv.1711.09103,
title = {Discovery of a thin stellar stream in the SLAMS survey},
author = {P. Jethwa and G. Torrealba and C. Navarrete and J. A. Carballo-Bello and T. de Boer and D. Erkal and S. E. Koposov and S. Duffau and D. Geisler and M. Catelan and V. Belokurov},
journal= {arXiv preprint arXiv:1711.09103},
year = {2018}
}