Abstract
view Abstract Citations (22) References (31) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Some systematic trends in the color variations of T Tauri stars at visible wavelengths. Vrba, F. J. ; Rydgren, A. E. ; Zak, D. S. ; Schmelz, J. T. Abstract The dependence of U - B, B - V, and V - I color on V magnitude is examined for ten well-observed T Tauri stars, based on photometry from numerous sources. It is found that the 'color slopes' d(B - V)/dV and d(V - I)/dV, due to variability, differ significantly between stars and tend to be larger for T Tauri stars of later spectral type. Furthermore, when the color slopes are small, the B - V color slope is significantly less than the V - I color slope. All of these results are in accord with the hypothesis that the primary source of large-amplitude brightness variations in T Tauri stars is a changing mix of photospheric regions, hot plage regions, and dark spots on the stellar surface. In addition, the large scatter observed in U - B is consistent with flare-like events. Publication: The Astronomical Journal Pub Date: February 1985 DOI: 10.1086/113735 Bibcode: 1985AJ.....90..326V Keywords: Stellar Color; T Tauri Stars; Visible Spectrum; Astronomical Photometry; Chromosphere; Flare Stars; Astrophysics full text sources ADS | data products SIMBAD (11)
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