The variability of RY LUPI

Details The variability of RY LUPI The variability of RY LUPI

May 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982mnras.199p..37e&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 199, May 1982, p. 37P-43P. Research supported by the Science and Engine

Astronomy and Astrophysics

Astronomy

14

H Beta Line, Infrared Spectrophotometers, Interstellar Extinction, Stellar Spectrophotometry, Subgiant Stars, Variable Stars, Broadband, Light (Visible Radiation), Light Curve, Near Infrared Radiation, Stellar Envelopes, Stellar Models, Stellar Occultation, Stellar Spectra, Ubv Spectra, Variability

Scientific paper

Simultaneous optical and infrared broadband photometry (between 0.35 and 3.5 microns) and H-beta index photometry are obtained for the T Tauri star RY Lupi. The results favor a model in which the variability of the star is caused by variable circumstellar extinction. It is noted that the evidence is strong that variable envelope emission is the process responsible for variability in some T Tauri stars. Assuming that the condensations occult the star independently, the respective extinction laws are deduced by considering photometry for one of the large-amplitude variations and the small-amplitude changes; intrinsic colors for a G0V star are taken from Johnson (1966).

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