X-ray and radio observations of flares from the RS Canum Venaticorum system UX Arietis.
Abstract
In July 1987 the RS CVn system UX Ari was observed in the 2-20-keV X-ray band by Ginga, immediately followed by 5-GHz radio observations. UX Ari was found to be very active at both radio and X-ray frequencies. Quiescent X-ray emission with a luminosity of 3 x 10 to the 31st erg/s (in the 2-20-keV band) was detected, together with two intense X-ray flares up to 2 x 10 to the 32nd and 6 x 10 to the 31st erg/s, respectively. Both flare and quiescent X-ray spectra are well fitted by single-temperature thermal bremsstrahlung models, with the continuum temperature and emission measure in the range 4-7 kev (in kT) and (2-10) x 10 to the 54th/cu cm, respectively.
- Publication:
-
Publications of the Astronomical Society of Japan
- Pub Date:
- 1989
- Bibcode:
- 1989PASJ...41..679T
- Keywords:
-
- Continuous Radiation;
- Radio Observation;
- Stellar Coronas;
- Stellar Flares;
- X Ray Astronomy;
- X Ray Sources;
- Binary Stars;
- Bremsstrahlung;
- Japanese Space Program;
- Satellite Observation;
- Astrophysics