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Mapping the Milky Way in 5D with 170 Million Stars

  • Authors: Joshua S. Speagle, 佳士 沈, Catherine Zucker, Ana Bonaca, Phillip A. Cargile, Benjamin D. Johnson, Angus Beane, Charlie Conroy, Douglas P. Finkbeiner, Gregory M. Green, Harshil M. Kamdar, Rohan Naidu, Hans-Walter Rix, Edward F. Schlafly, Aaron Dotter, Gwendolyn Eadie, Daniel J. Eisenstein, Alyssa A. Goodman, Jiwon Jesse Han, Andrew K. Saydjari, Yuan-Sen Ting, 源森 丁, Ioana A. Zelko

Joshua S. Speagle et al 2024 The Astrophysical Journal 970 .

  • Provider: AAS Journals

Caption: Figure 5.

A distribution of the distances (taken from a random posterior sample) for the 170 million objects in our catalog. The left panel shows the number of objects for the entire sample (black), all the sources with “acceptable” fits (the Augustus-Silver subset; orange), and all sources with “reliable” posteriors (the Augustus-Gold subset; red). There are around 125 million sources with reliable posteriors that have distances up to tens of kiloparsecs. The right panel shows the subset of sources for which the probability of being a giant (defined as ﹩\mathrm{log}g\lt 3.5﹩) is >5% (green), >50% (blue), and >95% (purple). These panels illustrate there are potentially millions of photometrically classified giants in the sample, although only a few million at very high confidence. See Section 4 for more information on the cuts applied here.

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