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A Ghost in Boötes: The Least-Luminous Disrupted Dwarf Galaxy

  • Authors: Vedant Chandra, Charlie Conroy, Nelson Caldwell, Ana Bonaca, Rohan P. Naidu, Dennis Zaritsky, Phillip A. Cargile, Jiwon Jesse Han, Benjamin D. Johnson, Joshua S. Speagle, 佳士 沈, Yuan-Sen Ting, 源森 丁, Turner Woody

Vedant Chandra et al 2022 The Astrophysical Journal 940 .

  • Provider: AAS Journals

Caption: Figure 5.

Top: 1σ–3σ confidence contours derived by fitting a grid of MIST isochrones to the six non-BHB spectroscopic members in Specter. The mean H3 spectroscopic metallicity is overlaid. Bottom: Pan-STARRS CMD of PM-selected members in the inner region of the stream, with the spectroscopic members highlighted as red stars. The overdensity of turnoff stars is best matched by a ∼13 Gyr isochrone and is inconsistent with an isochrone younger than ∼12 Gyr at this metallicity.

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