X-Ray Line Emission from Weak Wind O-Stars

David Huenemoerder; L. Oskinova; W. Hamann; Richard Ignace; H. Todt; W. Waldron

X-Ray Line Emission from Weak Wind O-Stars

David Huenemoerder, L. Oskinova, W. Hamann, Richard Ignace, H. Todt, W. Waldron

Department of Physics and Astronomy

Massachusetts Institute of Technology

Research output: Contribution to conference › Presentation

Abstract

The action of X-rays is commonly invoked to explain the wind properties of low-luminosity O-type stars. These stars have significantly smaller mass loss rates than predicted radiation-driven wind theories. In this respect they may resemble the first generation of supermassive stars in the early universe which presumably had weak winds due to their low metallicity. We present the high-resolution X-ray spectrum of a weak-wind star, mu Col, and discuss the potential for X-ray emission line strengths and profiles to discriminate among proposed mechanisms for the generation of X-rays in stellar winds, and in resolving the weak-wind problem.

Original language	American English
State	Published - 2011
Event	American Astronomical Society, High Energy Astrophysics Division, HEAD 2011, #10.02 - Duration: Jan 1 2011 → …

Conference

Conference	American Astronomical Society, High Energy Astrophysics Division, HEAD 2011, #10.02
Period	1/1/11 → …

Keywords

Line Emission
Wind O-Stars
X-Ray

Disciplines

Astrophysics and Astronomy
Stars, Interstellar Medium and the Galaxy

Cite this

@conference{ac6c15e857614009bb4194bfff08ac80,

title = "X-Ray Line Emission from Weak Wind O-Stars",

abstract = " The action of X-rays is commonly invoked to explain the wind properties of low-luminosity O-type stars. These stars have significantly smaller mass loss rates than predicted radiation-driven wind theories. In this respect they may resemble the first generation of supermassive stars in the early universe which presumably had weak winds due to their low metallicity. We present the high-resolution X-ray spectrum of a weak-wind star, mu Col, and discuss the potential for X-ray emission line strengths and profiles to discriminate among proposed mechanisms for the generation of X-rays in stellar winds, and in resolving the weak-wind problem.",

keywords = "Line Emission, Wind O-Stars, X-Ray",

author = "David Huenemoerder and L. Oskinova and W. Hamann and Richard Ignace and H. Todt and W. Waldron",

year = "2011",

language = "American English",

note = "American Astronomical Society, High Energy Astrophysics Division, HEAD 2011, \#10.02 ; Conference date: 01-01-2011",

}

TY - CONF

T1 - X-Ray Line Emission from Weak Wind O-Stars

AU - Huenemoerder, David

AU - Oskinova, L.

AU - Hamann, W.

AU - Ignace, Richard

AU - Todt, H.

AU - Waldron, W.

PY - 2011

Y1 - 2011

N2 - The action of X-rays is commonly invoked to explain the wind properties of low-luminosity O-type stars. These stars have significantly smaller mass loss rates than predicted radiation-driven wind theories. In this respect they may resemble the first generation of supermassive stars in the early universe which presumably had weak winds due to their low metallicity. We present the high-resolution X-ray spectrum of a weak-wind star, mu Col, and discuss the potential for X-ray emission line strengths and profiles to discriminate among proposed mechanisms for the generation of X-rays in stellar winds, and in resolving the weak-wind problem.

AB - The action of X-rays is commonly invoked to explain the wind properties of low-luminosity O-type stars. These stars have significantly smaller mass loss rates than predicted radiation-driven wind theories. In this respect they may resemble the first generation of supermassive stars in the early universe which presumably had weak winds due to their low metallicity. We present the high-resolution X-ray spectrum of a weak-wind star, mu Col, and discuss the potential for X-ray emission line strengths and profiles to discriminate among proposed mechanisms for the generation of X-rays in stellar winds, and in resolving the weak-wind problem.

KW - Line Emission

KW - Wind O-Stars

KW - X-Ray

M3 - Presentation

T2 - American Astronomical Society, High Energy Astrophysics Division, HEAD 2011, #10.02

Y2 - 1 January 2011

ER -