A Pan-STARRS1 View of the Bifurcated Sagittarius Stream

Abstract

We use data from the Pan-STARRS1 survey to present a panoramic view of the Sagittarius tidal stream in the southern Galactic hemisphere. As a result of the extensive sky coverage of Pan-STARRS1, the southern stream is visible along more than 60 degrees of its orbit, nearly double the length seen by the SDSS. The recently discovered southern bifurcation of the stream is also apparent, with the fainter branch of the stream visible over at least 30 degrees. Using a combination of fitting both the main sequence turn-off and the red clump, we measure the distance to both arms of the stream in the south. We find that the distances to the bright arm of the stream agree very well with the N-body models of Law & Majewski (2010). We also find that the faint arm lies ~5 kpc closer to the Sun than the bright arm, similar to the behavior seen in the northern hemisphere.

Accepted to ApJ. 10 pages, 8 figures

References in corpus (11)

• Detection of a 63 Degree Cold Stellar Stream in the Sloan Digital Sky Survey
• An Orphan in the "Field of Streams"
• The Origin of the Bifurcation in the Sagittarius Stream
• Detection of a 60 Degree-Long Dwarf Galaxy Debris Stream
• The Hercules-Aquila Cloud
• A 2MASS All-Sky View of the Sagittarius Dwarf Galaxy: Variation of the Metallicity Distribution Function Along the Sagittarius Stream
• Discovery of a New, Polar-Orbiting Debris Stream in the Milky Way Stellar Halo
• Tracing Sagittarius Structure with SDSS and SEGUE Imaging and Spectroscopy
• Detection of a population gradient in the Sagittarius Stream
• Distance to the Sagittarius Dwarf Galaxy using MACHO Project RR Lyrae stars
• An Improved Photometric Calibration of the Sloan Digital Sky Survey Imaging Data

Cited by in corpus (34)

• "Skinny Milky Way, Please", says Sagittarius
• And yet it moves: The dangers of artificially fixing the Milky Way center of mass in the presence of a massive Large Magellanic Cloud
• A Synoptic Map of Halo Substructures from the Pan-STARRS1 3π Survey
• The outer halo globular cluster system of M31 - II. Kinematics
• What's Up in the Milky Way? The Orientation of the Disc Relative to the Triaxial Halo
• Feeling the pull, a study of natural Galactic accelerometers. I: photometry of the delicate stellar stream of the Palomar 5 globular cluster
• The Complex Structure of Stars in the Outer Galactic Disk as revealed by Pan-STARRS1
• The $>100$ kpc Distant Spur of the Sagittarius Stream and the Outer Virgo Overdensity, as Seen in PS1 RR Lyrae Stars
• The Geometry of Sagittarius Stream from Pan-STARRS1 3$\pi$ RR Lyrae
• Unmixing the Galactic Halo with RR Lyrae tagging
• Mapping the Monoceros Ring in 3D with Pan-STARRS1
• Connecting the Milky Way potential profile to the orbital timescales and spatial structure of the Sagittarius Stream
• Tracing the tidal streams of the Sagittarius dSph, and halo Milky Way features, with carbon-rich long-period variables
• Selecting M-giants with infra-red photometry: Distances, metallicities and the Sagittarius stream
• The Sagittarius stream in Gaia eDR3 and the origin of the bifurcations
• Sagittarius stream 3-d kinematics from SDSS Stripe 82
• Hubble Space Telescope Proper Motions along the Sagittarius Stream: I. Observations and Results for Stars in Four Fields
• Stellar chemo-kinematics of the Cetus dwarf spheroidal galaxy
• The Radio Signatures of the First Supernovae
• Hubble Space Telescope Proper Motions of Individual Stars in Stellar Streams: Orphan, Sagittarius, Lethe, and the New "Parallel" Stream
• The paucity of globular clusters around the field elliptical NGC 7507
• Three-dimensional structure of the Sagittarius dSph core from RR Lyrae
• Finding halo streams with a pencil-beam survey: new wraps in the Sagittarius stream
• VISTA's view of the Sagittarius dwarf spheroidal galaxy and southern Galactic Bulge
• Detecting the Figure Rotation of Dark Matter Halos with Tidal Streams
• The Next Generation Virgo Cluster Survey. XIX. Tomography of Milky Way Substructures in the NGVS Footprint
• Cartography of Triangulum-Andromeda using SDSS stars
• Leaves on trees: identifying halo stars with extreme gradient boosted trees
• The kinematics of globular clusters systems in the outer halos of the Aquarius simulations
• SiO Maser Survey towards off-plane O-rich AGBs around the orbital plane of the Sagittarius Stellar Stream
• Fitting the density substructure of the stellar halo with MilkyWay@home
• A fork in the Sagittarius trailing debris
• Water Maser Survey towards off-plane O-rich AGBs around the orbital plane of the Sagittarius Stellar Stream
• The Sagittarius stellar stream embedded in a fermionic dark matter halo