Spots on the weak T Tauri star V410 Tau - The sun at one million years
1989; Institute of Physics; Volume: 98; Linguagem: Inglês
10.1086/115296
ISSN1538-3881
Autores Tópico(s)Astronomy and Astrophysical Research
ResumoNew photometry and a model of the spot distribution and its evolution on the weak T Tauri star V410 Tau are presented. In addition to the rotation period, 1.871 days, the modeling indicates that (1) the inclination angle is very large (i = 80 deg + or - 5 deg), (2) at least two spots are present, (3) the spots are very large (angular radii of roughly 40 deg or more), (4) they are centered at latitudes above 50 deg or below -50 deg, and (5) there is a high degree of symmetry between the northern and southern hemispheres. The evolution of the shape and amplitude of the light curve comes primarily from a drift in the relative longitudes of the northern and southern hemisphere spots. The radius of the star is determined to be 2.65 + or - 0.15 solar radii. In combination with the spectral type, this value implies a distance of 160 pc. On the theoretical H-R diagram, the star lies close to the expected position of a one solar mass star with an age of about one million yr.
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