Coronal temperatures of unusually active K-dwarf binary systems

Details Coronal temperatures of unusually active K-dwarf binary systems Coronal temperatures of unusually active K-dwarf binary systems

Mar 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994stin...9429861s&link_type=abstract

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Astronomy and Astrophysics

Astronomy

Binary Stars, High Temperature Plasmas, Plasma Spectra, Pulse Amplitude, Rosat Mission, Space Plasmas, Stellar Coronas, Stellar Radiation, Stellar Spectra, Stellar Temperature, X Ray Astronomy, X Ray Spectra, X Rays

Scientific paper

We report the results of a ROSAT pointed study of 4 BY Dra systems. Good quality pulse-height spectra are available from all four systems. Except for a required interstellar absorption component in HD 319139, the four systems have remarkably similar x-ray spectra; the two systems BD +22deg.669 and BD +23deg.635 look virtually identical in x rays. Analysis of the 4 x-ray spectra reveals that, in all cases, a single-temperature hot plasma (RS or Mewe) spectra is inadequate to fit the data, and two temperatures are required. We present examples of fitted pulse-height spectra and chi squared contours in kT1-kT2 space.

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