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Selection Functions in Astronomical Data Modeling, with the Space Density of White Dwarfs as a Worked Example

  • Authors: Hans-Walter Rix, David W. Hogg, Douglas Boubert, Anthony G. A. Brown, Andrew Casey, Ronald Drimmel, Andrew Everall, Morgan Fouesneau, and Adrian M. Price-Whelan

2021 The Astronomical Journal 162 142.

  • Provider: AAS Journals

Caption: Figure 10.

Estimate of the WD luminosity–color density (LCF) from a combination of the previous estimates. The high-density regions were estimated using the ﹩{\overline{{\rm{S}}/{\rm{N}}}}_{\varpi ,\min }\gt 80﹩ sample to take full advantage of the precise parallaxes for the sharp features in the diagram. The other parts were estimated from the ﹩{\overline{{\rm{S}}/{\rm{N}}}}_{\varpi ,\min }\gt 20﹩ sample, and finally from the ﹩{\overline{{\rm{S}}/{\rm{N}}}}_{\varpi ,\min }\gt 5﹩ sample that had been calculated on a coarser grid; these latter two steps reduce sampling noise in the low-density parts of the distribution.

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