Preprint
Chandra HETG X-ray Spectra and Variability of π Aqr, a γ Cas-type Be star
ArXiv.org
Cornell University
04/25/2024
DOI: 10.48550/arxiv.2404.16977
Abstract
High-resolution X-ray spectra of Aqr, a Cas-type star, obtained with the Chandra/HETG grating spectrometer, revealed emission lines of H-like ions of Mg, Si, S, and Fe, a strong, hard continuum, and a lack of He-like ions, indicating the presence of very hot thermal plasma. The X-ray light curve showed significant fluctuations, with coherent variability at period of about 3400 seconds in one observation. The hardness ratio was relatively constant except for one observation in which the spectrum was much harder and more absorbed. We interpret the X-ray emission as arising from accretion onto the secondary, which is likely a magnetic white dwarf, an intermediate polar system.
Details
- Title: Subtitle
- Chandra HETG X-ray Spectra and Variability of π Aqr, a γ Cas-type Be star
- Creators
- David P HuenemoerderPragati PradhanClaude R CanizaresSean GundersonRichard IgnaceJoy S NicholsA. M. T PollockNorbert S SchulzDustin K SwarmJose M Torrejon
- Resource Type
- Preprint
- Publication Details
- ArXiv.org
- DOI
- 10.48550/arxiv.2404.16977
- ISSN
- 2331-8422
- Publisher
- Cornell University; Ithaca, New York
- Language
- English
- Date posted
- 04/25/2024
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984936490502771
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