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SPECTRAL PROPERTIES OF COOL STARS: EXTENDED ABUNDANCE ANALYSIS OF 1,617 PLANET-SEARCH STARS

  • Authors: John M. Brewer, Debra A. Fischer, Jeff A. Valenti, and Nikolai Piskunov

2016 The Astrophysical Journal Supplement Series 225 32.

  • Provider: AAS Journals

Caption: Figure 13.

Comparisons to temperatures from interferometric diameter measurements had a scatter several times larger than the combined errors, suggesting that the errors were underestimated. The blue points above are only those points with reported errors in ﹩{T}_{\mathrm{eff}}﹩ from diameters <1% that seemed to match their scatter. These tend to be cooler than our spectroscopically determined temperatures with an offset of 39 K (blue dashed line) and an rms scatter of 82 K. Including all matching stars (both blue and gray points) resulted in an offset of 52 K and a scatter of 121 K, which appears to increase at higher effective temperatures, though there are a few overlapping measurements above 6200 K.

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