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A Galactic Perspective on the (Unremarkable) Relative Refractory Depletion Observed in the Sun

  • Authors: Rayna Rampalli, James W. Johnson, Melissa K. Ness, Graham H. Edwards, Elisabeth R. Newton, Emily J. Griffith, Megan Bedell, Kaile Wang

Rayna Rampalli et al 2026 The Astrophysical Journal 1002 .

  • Provider: AAS Journals

Caption: Figure 5.

Mean Tcond slope (﹩\frac{\partial [{\rm{X}}/{\rm{Fe}}]}{\partial {T}_{{\rm{cond}}}}﹩) as a function of mean Teff and colored by mean ﹩\mathrm{log}g﹩ for stars with the same [Fe/H] and [α/Fe] consistent with the Sun with B18 as circles (only one symbol shown since these stars occupy one bin), GALAH as squares, R24 as diamonds, and APOGEE as stars. There is a slight negative gradient in Tcond slope with Teff for each dataset (-3 ± 1E-7 dex/K2) and with ﹩\mathrm{log}g﹩ (-1 ± 3E-4 K2). Hotter and lower ﹩\mathrm{log}g﹩ stars tend to share ﹩\frac{\partial [{\rm{X}}/{\rm{Fe}}]}{\partial {T}_{{\rm{cond}}}}﹩ = 0 than stars with similar Teff and ﹩\mathrm{log}g﹩ as the Sun. The APOGEE stars are systemically offset from the rest of the surveys, given their difference in kinematic selection as shown in Figure 4.

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