27 citations · 92 across the 8 of their papers we have counts for
8 papers
Tayler instability as possible reason for the period changes in Ap star 56 Ari
I. S. Potravnov, L. L. Kitchatinov
The physical mechanism responsible for the photometric period changes in chemically peculiar star 56 Ari was searched. It was previously shown that rate of the star's period increa…
Longitudinal drift of Tayler instability eigenmodes as a possible explanation for super-slowly rotating Ap stars
L. L. Kitchatinov, I. S. Potravnov, A. A. Nepomnyashchikh
Rotation periods inferred from the magnetic variability of some Ap stars are incredibly long, exceeding ten years in some cases. An explanation for such slow rotation is lacking. T…
Flares of accretion activity of the 20 Myr old UXOR RZ Psc
I. S. Potravnov, V. P. Grinin, N. A. Serebriakova
We discuss a revision of accretion activity and kinematics of the enigmatic isolated UX Ori type star RZ Psc. Previously, RZ Psc was known to possess only spectroscopic signatures…
Accretion and outflow activity on the late phases of pre-main-sequence evolution. The case of RZ Piscium
I. S. Potravnov, D. E. Mkrtichian, V. P. Grinin +2
RZ Psc is an isolated high-latitude post-T Tauri star that demonstrates a UX Ori-type photometric activity. The star shows very weak spectroscopic signatures of accretion, but at t…
K I 7699 Å and related shell lines during the recent eclipse of Aurigae
C. Muthumariappan, M. Parthasarathy, R. Leadbeater +3
We report high-resolution (R = 30\ 000, 45\ 000 and 75\ 000) echelle and medium-resolution (R = 22\ 000 and 10\ 000) spectroscopic observations of the long-period, eclipsing binary…
Spectroscopy of ε Aurigae during the 2009-2011 eclipse
I. S. Potravnov, V. P. Grinin
The results of the spectral observations of a unique eclipsing system ε Aurigae obtained during the recent eclipse are presented. We traced the spectral lines variations at differe…
An active asteroid belt causing the UX Ori phenomenon in RZ Psc
W. J. de Wit, V. P. Grinin, I. S. Potravnov +3
We report the discovery of mid-infrared excess emission in the young object RZ Psc. The excess constitutes ~8% of its Lbol, and is well fit by a single 500K black-body implying a d…
The evolutionary status of the UX Orionis star RZ Piscium
V. P. Grinin, I. S. Potravnov, F. A. Musaev
The star RZ Psc is one of the most enigmatic members of the UX Ori star family. It shows all properties that are typical for these stars (the light variability, high linear polariz…