Low-energy X-ray observations of the Wolf 630 system

Details Low-energy X-ray observations of the Wolf 630 system Low-energy X-ray observations of the Wolf 630 system

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...316..458j&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 316, May 1, 1987, p. 458-461.

Astronomy and Astrophysics

Astronomy

13

Binary Stars, Channel Multipliers, Dwarf Stars, M Stars, X Ray Astronomy, Exosat Satellite, Plasma Temperature, Stellar Coronas

Scientific paper

The septuplet of M dwarfs is resolved into three components, Wolf 630ABab, Wolf 629ab, and VB 8AB, with the EXOSAT channel multiplier array (CMA). W 630 and VB 8 have previously been observed with the Einstein high resolution imager (HRI). The ratio of CMA to HRI count rates for VB 8 can be produced with an isothermal plasma model temperature T = 6.4×105K, which is exceptionally low in the known range of coronal temperatures. The count rate during 18,112 s of effective exposure with EXOSAT shows that VB 8 flared once in 0.05 - 2 keV flux.

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