Summary: Stellar Coronae in the Chandra and XMM­Newton Era
ASP Conference Series, Vol. TBD, 2001
F. Favata & J. Drake
Emission measure modeling and abundance determination
of Procyon by means of a variety of instruments on board
Chandra and XMM­Newton
A. J. J. Raassen 1;2 , M. Audard 3 , R. Mewe 1 , M. G¨udel 3 ,
R. L. J. van der Meer 1 , E. Behar 4
Abstract. We report the analysis of the high­resolution X­ray spec­
trum of the nearby F­type star Procyon in the wavelength range from 5
to 175 š A obtained with the Low Energy Transmission Grating Spectrom­
eter (LETGS) on board Chandra and in the wavelength range from 5 to
37 š A obtained with the Reflection Grating Spectrometers (RGS) on board
XMM­Newton. By means of global fitting, using SPEX in combination
with the MEKAL code, a multi­temperature fit has been carried out and
self­consistent temperatures and Emission Measures (EM) have been ob­
tained, applying the regularisation method. Temperatures ranging from
0.7--2.5 MK have been established. The total volume emission measure is
¸ 3:6 \Theta 10 50 cm \Gamma3 . No indications for a hot component (T ¸ ? 4 MK) from
higher ionization stages of Fe such as Fe XVIII and higher were found.

Source: Audard, Marc - INTEGRAL Science Data Centre & Observatory of Geneva, Université de Genève
Guedel, Manuel - Institut für Astronomie, Universität Wien

Collections: Physics