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arXiv:astro-ph/0403603 (astro-ph)
[Submitted on 25 Mar 2004 (v1), last revised 20 Mar 2005 (this version, v2)]

Title:Ion-by-Ion DEM Determination: I. Method

Authors:Patrick S. Wojdowski (1 and 2), Norbert S. Schulz (1) ((1) Center for Space Research, Massachusetts Institute of Technology (2) Arete Associates, Sherman Oaks, CA)
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Abstract: We describe a technique to derive constraints on the differential emission measure (DEM) distribution, a measure of the temperature distribution, of collisionally ionized hot plasmas from their X-ray emission line spectra. This technique involves fitting spectra using a number of components, each of which is the entire X-ray line emission spectrum for a single ion. It is applicable to high-resolution X-ray spectra of any collisionally ionized plasma and particularly useful for spectra in which the emission lines are broadened and blended such as those of the winds of hot stars. This method does not require that any explicit assumptions about the form of the DEM distribution be made and is easily automated.
Comments: This paper was split in two. This version is part I. Part II may be found at astro-ph/0503430
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:astro-ph/0403603
  (or arXiv:astro-ph/0403603v2 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/0403603
Journal reference: 2004 ApJ 616, 630
Related DOI: https://doi.org/10.1086/424904

Submission history

From: Patrick S. Wojdowski [view email]
[v1] Thu, 25 Mar 2004 20:37:08 UTC (302 KB)
[v2] Sun, 20 Mar 2005 01:58:43 UTC (106 KB)
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