New aspects of the variability of the probable pre-main sequence star HR 5999

Details New aspects of the variability of the probable pre-main sequence star HR 5999 New aspects of the variability of the probable pre-main sequence star HR 5999

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...209..255b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 209, no. 1-2, Jan. 1989, p. 255-267.

Astronomy and Astrophysics

Astrophysics

31

Pre-Main Sequence Stars, Stellar Envelopes, Stellar Spectra, Variable Stars, Charge Coupled Devices, Color-Magnitude Diagram, Stellar Composition, Ubv Spectra

Scientific paper

CCD spectroscopy was used to obtain 24 high-resolution line profiles of Ca II 3933 A, Mg II 4481 A, Si II 6347 A and 6371 A, and H alpha for the probable premain sequence star HR 5999. The results suggest that HR 5999 is intrinsically variable, and that the star was observed near its maximum visual brightness. A time series analysis of previous visual magnitudes reveals a modulation of the light curve with a period of 48.68 days and an amplitude of 0.25 mag in V.

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