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ULTRA-HIGH-RESOLUTION OBSERVATIONS OF CA K-LINE VARIATIONS IN THE BETA-PICTORIS DISC

CRAWFORD, IA; SPYROMILIO, J; BARLOW, MJ; DIEGO, F; LAGRANGE, AM; (1994) ULTRA-HIGH-RESOLUTION OBSERVATIONS OF CA K-LINE VARIATIONS IN THE BETA-PICTORIS DISC. MON NOT R ASTRON SOC , 266 (4) L65 - L68.

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Abstract

We present observations of the beta Pictoris circumstellar Ca II K line, obtained with the new Ultra-High-Resolution facility (UHRF) at the Anglo-Australian Telescope. The resolving power was R greater than or similar to 900000, and these data therefore comprise the highest resolution observations yet obtained of this object. Observations were obtained on three nights in 1993 (May 11, August 26 and August 29), and significant temporal variability was observed, including previously unobserved changes in the profile of the main circumstellar component.

Type:Article
Title:ULTRA-HIGH-RESOLUTION OBSERVATIONS OF CA K-LINE VARIATIONS IN THE BETA-PICTORIS DISC
Keywords:LINE PROFILES, CIRCUMSTELLAR MATTER, STARS INDIVIDUAL BETA-PIC, SCORPIUS OB1 ASSOCIATION, CIRCUMSTELLAR DISK, GAS, CH+, CN
UCL classification:UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Physics and Astronomy

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