5 citations · 16 across the 7 of their papers we have counts for
7 papers · 1 filter
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…
On the surface distribution of chromium in Ap star HD 152564
I. S. Potravnov, T. A. Ryabchikova
The spectroscopic and photometric variability of magnetic Ap/Bp stars is caused by the surface inhomogeneities of their chemical composition (spots) that affect the structure of th…
Are the surface abundance structures stable in rapidly rotating Ap star 56 Ari?
I. Potravnov, N. Piskunov, T. Ryabchikova
The surface magnetic and abundance inhomogeneities in chemically peculiar Ap/Bp stars are coupled and responsible for their rotationally modulated variability. Within the framework…
Magnetospheric accretion at the late phases of the Pre-Main-Sequence evolution. The case of RZ Psc
D. V. Dmitriev, V. P. Grinin, I. S. Potravnov +1
It has been shown that during the outburst of accretion activity observed in UX Ori type star RZ Psc in 2013, the accretion rate increased approximately by an order of magnitude. T…
BD+30549: young helium-weak silicon star in NGC 1333 star-forming region
I. Potravnov, L. Mashonkina, T. Ryabchikova
We present results of the spectroscopic study of the chemically peculiar star BD+30549 which is bona-fide member of young NGC 1333 star forming region. We found that the st…
Jet from the enigmatic high-latitude star BP Psc and evolutionary status of its driving source
I. S. Potravnov, M. Yu. Khovritchev, S. A. Artemenko +1
BP Psc is an active late-type (sp:G9) star with unclear evolutionary status lying at high galactic latitude . It is also the source of the well collimated bipolar je…