BEPPOSAX DETECTION OF HARD (GREATER-THAN-20 KEV) X-RAY-EMISSION FROM THE ACTIVE STAR UX ARIETIS

Authors
PALLAVICINI R TAGLIAFERRI G
Citation
R. Pallavicini et G. Tagliaferri, BEPPOSAX DETECTION OF HARD (GREATER-THAN-20 KEV) X-RAY-EMISSION FROM THE ACTIVE STAR UX ARIETIS, Nuclear physics. B, Proceedings supplement, 69(1-3), 1999, pp. 29-32
Citations number
4
Categorie Soggetti
Physics, Particles & Fields
Journal title
Nuclear physics. B, Proceedings supplement → ACNP
ISSN journal
09205632
Volume
69
Issue
1-3
Year of publication
1999
Pages
29 - 32
Database
ISI
SICI code
0920-5632(1999)69:1-3<29:BDOH(K>2.0.ZU;2-L
Abstract
We present preliminary results of a BeppoSAX observation of the active binary star UX Arietis. We report the first detection in a star other the Sun of hard (> 20 keV) X-ray emission during a large flare. Simil ar results were obtained a few days later for a flare observed by Bepp oSAX on Algol. We analyse time-resolved spectra of the UX Ari flare ob tained with the LEGS and MECS detectors over the spectral range 0.1 to 10 keV and we discuss possible interpretations for the high energy ta il seen with the PDS detector.