Long-period variations in R CrA, S CrA, T CrA, and R MON

Details Long-period variations in R CrA, S CrA, T CrA, and R MON Long-period variations in R CrA, S CrA, T CrA, and R MON

May 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980aj.....85..555b&link_type=abstract

Astronomical Journal, vol. 85, May 1980, p. 555-559.

Astronomy and Astrophysics

Astronomy

15

Light Curve, Stellar Magnitude, T Tauri Stars, Variable Stars, Brightness, Irregular Variable Stars, Light (Visible Radiation), Long Term Effects, Nebulae, Periodic Variations, Stellar Envelopes

Scientific paper

The visual variations in brightness of R CrA, S CrA, T CrA, and R Mon, all classified as T Tau-like irregular variable stars, have been investigated. Long-period variations with time scales of approximately 1000-1500 days and 8000-10,000 days were found in these stars. These long-period variations are unlikely to be due to pulsations of the stars themselves. There is some evidence that changes in circumstellar shells are responsible for the observed variations in these stars and in the variable reflection nebulae which are associated with R CrA and R Mon.

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