The variability of RY Lup.
Abstract
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).
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- May 1982
- DOI:
- 10.1093/mnras/199.1.37P
- Bibcode:
- 1982MNRAS.199P..37E
- Keywords:
-
- 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;
- Astronomy