A Dwarf Galaxy Debris Stream Associated with Palomar 1 and the Anticenter Stream

Abstract

We report the discovery of a new stream (dubbed as Yangtze) detected in $Gaia$ Data Release 3. The stream is at a heliocentric distance of $\sim$ 9.12 kpc and spans nearly 27$°$ by 1.9$°$ on sky. The colour-magnitude diagram of Yangtze indicates a stellar population of Age $\sim$ 11 Gyr and [M/H] $\sim$ -0.7 dex. It has a number density of about 5.5 stars degree${}^{-2}$ along with a surface brightness of ${\Sigma }_G\simeq$ 34.9 mag arcsec${}^{-2}$. The dynamics and metallicity estimate suggest that Yangtze may be closely related to Palomar 1 and the Anticenter stream.

8 pages, 4 figures, accepted by ApJL. arXiv admin note: substantial text overlap with arXiv:2208.05176

References in corpus (14)

• The mass distribution and gravitational potential of the Milky Way
• Detection of a 60 Degree-Long Dwarf Galaxy Debris Stream
• Substructure in Tidal Streams; Tributaries in the Anticenter Ring
• Discovery of a New, Polar-Orbiting Debris Stream in the Milky Way Stellar Halo
• A Low-Mass Stellar-Debris Stream Associated with a Globular Cluster Pair in the Halo
• A Milky Way with a massive, centrally concentrated thick disc: new Galactic mass models for orbit computations
• 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
• The outer disc in shambles: blind detection of Monoceros and ACS with Gaia's astrometric sample
• Revisit NGC 5466 Tidal Stream with $Gaia$, SDSS/SEGUE and LAMOST
• Existence of Tidal Tails for the Globular Cluster NGC 5824
• A New Cold Stream near the Southern Galactic Pole

Cited by in corpus (1)

• Flipping of the tidal tails of the Ophiuchus stream due to the decelerating Galactic bar