naa a22 4500 510790283 CHVBK 20180411083317.0 cr unu---uuuuu 180411e20130401xx s 000 0 eng 10.1134/S1063773713040038 doi (NATIONALLICENCE)springer-10.1134/S1063773713040038 Grankin K. Crimean Astrophysical Observatory, 98409, Nauchny, Crimea, Ukraine aut Magnetically active stars in Taurus-Auriga: Photometric variability and basic physical parameters [Elektronische Daten] [K. Grankin] We have analyzed homogeneous long-term photometric observations of 28 well-known weakline T Tauri stars (WTTS) and 60 WTTS candidates detected by the ROSAT observatory toward the Taurus-Auriga star-forming region. We show that 22 known WTTS and 39 WTTS candidates exhibit periodic light variations that are attributable to the phenomenon of spotted rotational modulation. The rotation periods of these spotted stars lie within the range from 0.5 to 10 days. Significant differences between the long-term photometric behaviors of known WTTS and WTTS candidates have been found. We have calculated accurate luminosities, radii, masses, and ages for 74 stars. About 33% of the sample of WTTS candidates have ages younger than 10 Myr. The mean distance to 24 WTTS candidates with reliable estimates of their radii is shown to be 143 ± 26 pc. This is in excellent agreement with the adopted distance to the Taurus-Auriga star-forming region. Pleiades Publishing, Ltd., 2013 stars—variable nationallicence properties nationallicence rotation nationallicence pre-main-sequence stars nationallicence Astronomy Letters SP MAIK Nauka/Interperiodica 39/4(2013-04-01), 251-266 1063-7737 39:4<251 2013 39 11443 https://doi.org/10.1134/S1063773713040038 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S1063773713040038 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Grankin K. Crimean Astrophysical Observatory, 98409, Nauchny, Crimea, Ukraine aut NATIONALLICENCE 773 0- Astronomy Letters SP MAIK Nauka/Interperiodica 39/4(2013-04-01), 251-266 1063-7737 39:4<251 2013 39 11443 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer