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Ultra-high-resolution observations of Ca K line variations in the β Pictoris disc

CRAWFORD, IA; SPYROMILIO, J; BARLOW, MJ; DIEGO, F; LAGRANGE, AM; (1994) Ultra-high-resolution observations of Ca K line variations in the β Pictoris disc. Monthly Notices of the Royal Astronomical Society , 266 (1) L65-L68. 10.1093/mnras/266.1.L65. Green open access

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Abstract

We present observations of the β 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≳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 β Pictoris disc
Open access status: An open access version is available from UCL Discovery
DOI: 10.1093/mnras/266.1.L65
Publisher version: https://doi.org/10.1093/mnras/266.1.L65
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: line: profiles, circumstellar matter, stars: individual: β Pic
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/10096170
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