Low-Energy X-Ray Observations of the Wolf 630 System
Abstract
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.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- May 1987
- DOI:
- 10.1086/165214
- Bibcode:
- 1987ApJ...316..458J
- Keywords:
-
- Binary Stars;
- Channel Multipliers;
- Dwarf Stars;
- M Stars;
- X Ray Astronomy;
- Exosat Satellite;
- Plasma Temperature;
- Stellar Coronas;
- Astrophysics;
- STARS: FLARE;
- STARS: INDIVIDUAL NAME: WOLF 630;
- STARS: VISUAL MULTIPLES;
- STARS: X-RAYS