Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2010-11-12
Astronomy Reports, Volume 54, Issue 2, pp.163-172, 2010
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
Scientific paper
Long-term, uniform series of UBVR observations of T Tauri and Herbig Ae stars obtained over 20 yr at the Maidanak Observatory as part of the ROTOR program are analyzed. We find a linear relationship between the characteristic variability time scale and the bolometric luminosity of the star+disk system: the higher the luminosity, the slower the brightness variations. This dependence is valid over a wide range of masses and luminosities, from T Tauri stars to Herbig Ae stars. On average, the variability time scale is one-quarter the Keplerian period at the dust-sublimation radius, which is known from interferometric observations. Some T Tauri stars have periods from 25 to 120 days, which are preserved over several observing seasons. These periods correspond to Keplerian orbits with semi-major axes from 0.14 to 0.52 AU. The results obtained provide indirect evidence for the existence of protoplanets in the gas-dust disks of stars in early stages of their evolution toward the main sequence.
Artemenko Svetlana A.
Grankin Konstantin N.
Petrov P. P.
No associations
LandOfFree
Search for Keplerian periods in light variations of T Tauri stars and Herbig Ae stars 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 Search for Keplerian periods in light variations of T Tauri stars and Herbig Ae stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Search for Keplerian periods in light variations of T Tauri stars and Herbig Ae stars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-204000