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Population of X-Ray Sources in the Intermediate-age Cluster NGC 3532: a Test Bed for Machine-learning Classification

  • Authors: Steven Chen, Oleg Kargaltsev, Hui Yang, Jeremy Hare, Igor Volkov, Blagoy Rangelov, John Tomsick

Steven Chen et al 2023 The Astrophysical Journal 948 .

  • Provider: AAS Journals

Caption: Figure 3.

Color–magnitude diagram (CMD) of NGC 3532. All Gaia sources located within ﹩20^{\prime} ﹩ from the center of Chandra observation are shown in black. Cluster members are shown in cyan. Cluster WDs with Gaia counterparts are shown in green. Sources with X-ray counterparts are shown in red–yellow color scale, with color indicating the Chandra hardness ratio HR ms (redder color corresponds to softer spectrum), and size proportional to the logarithm of the broadband flux (F b ). Variable X-ray sources marked with asterisks. An extinction vector corresponding to A V = 1 is shown in blue, while the total Galactic A V in this direction is ≈4. An isochrone corresponding to the age of 300 Myr, d = 484 pc, and extinction E(BV) = 0.034 is also plotted. Reference labels for several spectral types based on isochrone masses are shown.

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