Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20910104b&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #101.04; Bulletin of the American Astronomical Society,
Astronomy and Astrophysics
Astronomy
1
Scientific paper
Clumpiness in the flows of massive star winds is an issue of growing importance for the interpretation of spectral diagnostics from these sources, including the formation of X-ray emission profiles. High resolution data from Chandra and XMM-Newton appear to demand clumped wind flow to explain the observed line profile shapes. Hydrodynamic simulations of hypersonic wind flow impacting a solid spherical clump yield a semi-analytic solution for the emissive properties of the adiabatically cooling, hot gas component. We present model line profiles based on these hydrodynamic results for an ensemble of wind clumps, and discuss the applicability of the model to data.
A.B. and R.I. acknowledge funding by a partnership between the National Science Foundation (NSF AST-0552798) Research Experiences for Undergraduates (REU) and the Department of Defense (DoD) ASSURE (Awards to Stimulate and Support Undergraduate Research Experiences) programs. R.I. and J.C. acknowledge support provided by the NASA/Chandra Theory program, grant award TM4-5001.
Burke Alexander
Cassinelli Joe P.
Ignace Richard
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