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Chandra HETG X-Ray Spectra and Variability of π Aqr, a γ Cas-type Be Star

  • Authors: David P. Huenemoerder, Pragati Pradhan, Claude R. Canizares, Sean Gunderson, Richard Ignace, Joy S. Nichols, A. M. T. Pollock, Norbert S. Schulz, Dustin K. Swarm, José M. Torrejón

David P. Huenemoerder et al 2024 The Astrophysical Journal Letters 966 .

  • Provider: AAS Journals

Caption: Figure 3.

The π Aqr model (red), with absorption removed and renormalized to the observed mean flux of EX Hya, an intermediate polar (black). The continuum shapes are similar, but the π Aqr emission lines are weaker relative to the continuum, especially the He-like features, which also have a much lower He- to H-like ratio.

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