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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 7.

A corner plot showing the collective 1D and 2D posterior distributions for the parameters constrained for each of the 125 million Augustus-Gold stars. These parameters are (from left to right): the initial mass (M init), initial metallicity ([Fe/H]init), EEP, age (﹩\mathrm{log}{t}_{\mathrm{age}}﹩), effective temperature (﹩\mathrm{log}{T}_{\mathrm{eff}}﹩), bolometric luminosity (﹩\mathrm{log}{L}_{\mathrm{bol}}﹩), surface gravity (﹩\mathrm{log}g﹩), distance ﹩\mathrm{log}d﹩, extinction (A V ), and “differential” extinction (R V ). The titles of each column show the median and the interval encompassing 95% of the sample. As expected, the majority the sample comprises sources with low extinction (A V ≲ 1 mag) and initial masses ranging from 0.55 M < M init < 1.2 M , with the lower limit imposed by the lower M init bound on our underlying grid of stellar models. Gridding effects can be seen in a few panels.

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