The Beta Pictoris circumstellar disk. V - Time variations of the CA II-K line

Details The Beta Pictoris circumstellar disk. V - Time variations of the CA II-K line The Beta Pictoris circumstellar disk. V - Time variations of the CA II-K line

Oct 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...185..267f&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 185, no. 1-2, Oct. 1987, p. 267-270.

Astronomy and Astrophysics

Astronomy

85

Interstellar Extinction, K Lines, Spectrum Analysis, Stellar Envelopes, Stellar Spectra, Absorption Spectra, Calcium, Infrared Astronomy Satellite, Infrared Sources (Astronomy), Potassium

Scientific paper

Observations of the Ca II-K line profile in β Pictoris (A5 V) at different epochs show drastic changes on time scales of months, days and hours. At the center of the stellar line, a relatively stable narrow absorption feature is present while, on its red wing, absorptions can appear and disappear. These changes could be related either to a "classical" shell very close to the star or to the much more extended circumstellar dust disk present around β Pic. In this last case, they may be related to cometary-like objects falling on the star.

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