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Evolution of Stellar Activity and Habitable Zone. IV. Calcium II Infrared Triplet Activity from Open Clusters and White Dwarf Binaries

  • Authors: Shidi Zhang, Song Wang, Henggeng Han, Wenyuan Cui

Shidi Zhang et al 2026 The Astrophysical Journal 1011 .

  • Provider: AAS Journals

Caption: Figure 3.

EW distribution of our sample stars (method 2). Red dots denote the fitting points. Black lines represent the fitting to the most inactive stars, which were used as the photometric and and nonmagnetic chromospheric contribution (EWphot) to each Ca II IRT line.

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