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AN XMM-NEWTON STUDY OF THE CORONAE OF 2 CORONAE BOREALIS
 

Summary: AN XMM-NEWTON STUDY OF THE CORONAE OF 2
CORONAE BOREALIS
Jin A. Suh and Marc Audard1
Columbia Astrophysics Laboratory, Mail Code 5247, 550 West 120th Street, New York, NY 10027;
jas2010@columbia.edu, audard@astro.columbia.edu
Manuel Gu¨del
Paul Scherrer Institut, 5232 Villigen PSI, Switzerland; guedel@astro.phys.ethz.ch
and
Frederik B. S. Paerels
Columbia Astrophysics Laboratory, Mail Code 5247, 550 West 120th Street,
New York, NY 10027; frits@astro.columbia.edu
Received 2005 February 28; accepted 2005 May 11
ABSTRACT
We present results of XMM-Newton Guaranteed Time observations of the RS CVn binary 2
Coronae Borealis.
The spectra obtained with the Reflection Grating Spectrometers and the European Photon Imaging Camera MOS2
were simultaneously fitted with collisional ionization equilibrium plasma models to determine coronal abundances
of various elements. Contrary to the solar first ionization potential (FIP) effect, in which elements with a low FIP are
overabundant in the corona compared to the solar photosphere, and contrary to the ``inverse'' FIP effect observed in
several active RS CVn binaries, coronal abundance ratios in 2

  

Source: Audard, Marc - INTEGRAL Science Data Centre & Observatory of Geneva, Université de Genève

 

Collections: Physics