A New Cold Stream near the Southern Galactic Pole

Abstract

We report the discovery of a cold stream near the southern Galactic pole (dubbed as SGP-S) detected in $Gaia$ Early Data Release 3. The stream is at a heliocentric distance of $\sim$ 9.5 kpc and spans nearly 58${}^{\circ }$ by 0.6${}^{\circ }$ on sky. The colour-magnitude diagram of SGP-S indicates an old and metal-poor (age $\sim$ 12 Gyr, [M/H] $\sim$ -2.0 dex) stellar population. The stream's surface brightness reaches an exceedingly low level of ${\Sigma }_G\simeq$ 36.2 mag arcsec${}^{-2}$. Neither extant globular clusters nor other known streams are associated with SGP-S.

References in corpus (13)

• galpy: A Python Library for Galactic Dynamics
• The Milky Way's circular velocity curve between 4 and 14 kpc from APOGEE data
• Detection of a 63 Degree Cold Stellar Stream in the Sloan Digital Sky Survey
• "Skinny Milky Way, Please", says Sagittarius
• The shape of the inner Milky Way halo from observations of the Pal 5 and GD-1 stellar streams
• Discovery of a New, Polar-Orbiting Debris Stream in the Milky Way Stellar Halo
• Discovery of a cold stellar stream in the ATLAS DR1 data
• Orbital Clustering Identifies the Origins of Galactic Stellar Streams
• A Catalog of Moving Group Candidates in The Solar Neighborhood
• Icarus: a Flat and Fast Prograde Stellar Stream in the Milky Way disk
• Stellar Stream Candidates in the Solar Neighborhood Found in the LAMOST DR3 and TGAS
• Extended Tidal Tails of IC 4756 detected by {\it Gaia} EDR3
• Revisit NGC 5466 Tidal Stream with $Gaia$, SDSS/SEGUE and LAMOST

Cited by in corpus (3)

• The Spectacular Tidal Tails of Globular Cluster M3 (NGC 5272)
• Flipping of the tidal tails of the Ophiuchus stream due to the decelerating Galactic bar
• A Dwarf Galaxy Debris Stream Associated with Palomar 1 and the Anticenter Stream