Emission- and Absorption-Measure Distributions

Details Emission- and Absorption-Measure Distributions Emission- and Absorption-Measure Distributions

Aug 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006hrxs.confe...1b&link_type=abstract

High Resolution X-ray Spectroscopy: towards XEUS and Con-X, Proceedings of the international workshop held at the Mullard Space

Physics

Scientific paper

The fundamental measured quantities in line resolved X-ray spectra are the ionic emission measures (n2V) from emission spectra, and the ionic column densities (n*r) from absorption spectra. The reconstruction of the actual distribution of these quantities in the astrophysical plasma as a function of temperature and ionization parameter is quite challenging. Moreover, it is intrinsically limited by the underlying physics of the emission and absorption processes, irrespective of the quality of the observation. In this talk, recent results of emission and absorption grating spectra will be presented as well as the attempt to reconstruct the best possible aforementioned distributions. Implications for heating processes and thermal instabilities in astrophysical plasmas will be discussed.

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