A Pan-STARRS1 VIEW OF THE BIFURCATED SAGITTARIUS STREAM

C. T. Slater*, E. F. Bell, E. F. Schlafly, M. Juric, N. F. Martin, H. -W. Rix, E. J. Bernard, W. S. Burgett, K. C. Chambers, D. P. Finkbeiner, B. Goldman, N. Kaiser, E. A. Magnier, E. P. Morganson, P. A. Price, J. L. Tonry

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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 Sloan Digital Sky Survey. 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 turnoff 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. We also find that the faint arm lies similar to 5 kpc closer to the Sun than the bright arm, similar to the behavior seen in the northern hemisphere.

Original languageEnglish
Article number6
Number of pages9
JournalAstrophysical Journal
Volume762
Issue number1
DOIs
Publication statusPublished - 1 Jan 2013

Keywords

  • Galaxy: halo
  • Galaxy: structure
  • Local Group
  • DIGITAL SKY SURVEY
  • DWARF SPHEROIDAL GALAXY
  • GIANT BRANCH TIP
  • RED CLUMP STARS
  • RR-LYRAE STARS
  • MILKY-WAY
  • GALACTIC HALO
  • TIDAL STREAM
  • PHOTOMETRIC CALIBRATION
  • STELLAR STREAM

Fingerprint

Dive into the research topics of 'A Pan-STARRS1 VIEW OF THE BIFURCATED SAGITTARIUS STREAM'. Together they form a unique fingerprint.

Cite this