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The Field of Streams: Sagittarius and its Siblings

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arxiv astro-ph/0605025 v1 pith:QI7G46IP submitted 2006-05-01 astro-ph

V. Belokurov (1) , D. B. Zucker (1) , N. W. Evans (1) , G. Gilmore (1) , S. Vidrih (1) , D. M. Bramich (1) , H. J. Newberg (2) , R. F. G. Wyse (3)
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M. J. Irwin (1) M. Fellhauer (1) P. C. Hewett (1) N. A. Walton (1) M. I. Wilkinson (1) N. Cole (2) B. Yanny (4) C. M. Rockosi (5) T. C. Beers (6) E. F. Bell (7) J. Brinkmann (8) Z. Ivesic (9) R. Lupton (10) ((1) Cambridge (2) RPI (3) JHU (4) FNAL (5) Lick UCSD (6) Michigan State University (7) MPIA (8) Apache Point (9) Washington (10) Princeton)
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We use Sloan Digital Sky Survey (SDSS) Data Release 5 (DR5) u,g,r,i,z photometry to study Milky Way halo substructure in the area around the North Galactic Cap. A simple color cut (g-r < 0.4) reveals the tidal stream of the Sagittarius dwarf spheroidal, as well as a number of other stellar structures in the field. Two branches (A and B) of the Sagittarius stream are clearly visible in an RGB-composite image created from 3 magnitude slices, and there is also evidence for a still more distant wrap behind the A branch. A comparison of these data with numerical models suggests that the shape of the Galactic dark halo is close to spherical.

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Forward citations

Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Magnesium isotope ratios in Milky Way and dwarf galaxy stars

    astro-ph.GA 2026-07 conditional novelty 7.0 of 10

    Magnesium isotope ratios in Milky Way and accreted dwarf galaxy stars trace a single universal enrichment track when plotted against [Mg/H], despite differences at fixed [Fe/H].

  2. Reconstructing the Stripping History of the Sagittarius Stream with Neural Networks

    astro-ph.GA 2026-05 unverdicted novelty 7.0 of 10

    A neural network trained on simulations infers stripping times for Sagittarius stream stars from phase-space data, measuring a 0.3 dex/Gyr metallicity gradient and estimating ages for globular clusters such as Pal 12 ...

  3. Neighbors, Not Kin: Kinematic evidence for tidal tails from NGC 7492 along the Sagittarius stream

    astro-ph.GA 2026-07 accept novelty 6.0 of 10

    GIRAFFE radial velocities and metallicities confirm NGC 7492 tidal tails extending ≥1.8 deg, kinematically and chemically distinct from the overlapping Sagittarius stream.

  4. Constraints on the population level distribution of nearby Dark Matter halo shapes with extragalactic streams

    astro-ph.GA 2026-07 conditional novelty 5.5 of 10

    A gold subsample of 17 photometry-only extragalactic streams yields a mildly oblate dark-matter halo population with mean flattening μ_q ≈ 0.72 and scatter σ_q ≈ 0.34.

  5. Applying Liouville's Theorem to Gaia Data

    astro-ph.GA 2019-07 unverdicted novelty 5.0 of 10

    Phase-space density is recovered from Gaia data for M4 and disrupted streams by correcting entropy injection and minimizing stream entropy, enabling original mass inference via Liouville's theorem.

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