Journal article
Deriving X-Ray Line Profiles for Massive-star Winds from Momentum-conserving Dynamical Working Surface Solutions
The Astrophysical journal, Vol.965(2), 174
04/01/2024
DOI: 10.3847/1538-4357/ad3244
Abstract
We present a general procedure for deriving a line-profile model for massive-star X-ray spectra that captures the dynamics of the wind more directly. The basis of the model is the analytic solution to the problem of variable jets in Herbig-Haro objects given by Canto et al. In deriving our model, we generalize this jet solution to include flows with a prescribed nonzero acceleration for the context of radiatively driven winds. We provide example line profiles generated from our model for the case of sinusoidal velocity and mass-ejection variations. The example profiles show the expected shape of massive-star X-ray emission lines, as well as interesting but complicated trends with the model parameters. This establishes the possibility that observed X-rays could be a result of temporal variations seeded at the wind base, rather than purely generated intrinsically within the wind volume, and can be described via a quantitative language that connects with the physical attributes of those variations, consistently with the downstream momentum-conserving nature of radiatively cooled shocked radial flows.
Details
- Title: Subtitle
- Deriving X-Ray Line Profiles for Massive-star Winds from Momentum-conserving Dynamical Working Surface Solutions
- Creators
- Sean J. Gunderson - University of IowaKenneth G. Gayley - University of Iowa
- Resource Type
- Journal article
- Publication Details
- The Astrophysical journal, Vol.965(2), 174
- Publisher
- IOP Publishing Ltd
- DOI
- 10.3847/1538-4357/ad3244
- ISSN
- 0004-637X
- eISSN
- 1538-4357
- Number of pages
- 15
- Grant note
- University of Iowa (UI)https://doi.org/10.13039/100008893 University of Iowa's CLAS Dissertation Writing Fellowship NASA through the Smithsonian Astrophysical Observatory SV3-73016; NAS8-03060 / Chandra X-ray Center (CXC) Research Visitor Award
- Language
- English
- Date published
- 04/01/2024
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984621260002771
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