Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...266l..45s&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 266, Mar. 1, 1983, p. L45-L49.
Astronomy and Astrophysics
Astrophysics
33
Emission Spectra, Line Spectra, Stellar Spectrophotometry, T Tauri Stars, Variable Stars, Light Curve, Periodic Variations, Power Spectra, Stellar Rotation, Ubv Spectra
Scientific paper
A T Tauri star, SY Chamaeleontis, was observed to undergo strictly periodic brightness oscillations with a 1.6 mag B amplitude and a period of 6d.129. This Letter presents B, V, and R light curves for the years 1970-1972, during which these oscillations were seen. For most of its history since 1901, SY Cha showed small-amplitude irregular variability with mB ≡ 14.2. In 1970, SY Cha exhibited a roughly sinusoidal shaped light curve with a range of 13.4 mag < mB < 14.2 mag. During 1971 and 1972, the range had increased to 12.76 mag < mB < 14.34 mag. Sometimes between 1973 and 1978, the star resumed its old behavior pattern. A reasonable hypothesis is that a localized bright spot formed on or near the surface of SY Cha, and that stellar rotation caused the spot to appear and disappear as viewed from Earth.
No associations
LandOfFree
A large-amplitude photometric periodicity on a T Tauri star does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A large-amplitude photometric periodicity on a T Tauri star, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A large-amplitude photometric periodicity on a T Tauri star will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1466004