TY - JOUR

T1 - The evolutionary status of the UX Orionis star RZ Piscium

AU - Grinin, V. P.

AU - Potravnov, I. S.

AU - Musaev, F. A.

PY - 2010

Y1 - 2010

N2 - 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 polarization in deep minima, the blueing effect) except for one: it lacks any signatures of youth. With the lithium line 6708 Å as a rough estimate for the stellar age, we show that the “lithium” age of RZ Psc lies between the age of stars in the Pleiades (~70 Myr) and the Orion (~10 Myr) clusters. We also roughly estimated the age of RZ Psc based on the proper motion of the star using the Tycho-2 catalog. We found that the star has escaped from its assumed birthplace near to the Galactic plane about 30-40 Myr ago. We conclude that RZ Psc is a post-UXOr star, and its sporadic eclipses are caused by material from the debris disk.

AB - 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 polarization in deep minima, the blueing effect) except for one: it lacks any signatures of youth. With the lithium line 6708 Å as a rough estimate for the stellar age, we show that the “lithium” age of RZ Psc lies between the age of stars in the Pleiades (~70 Myr) and the Orion (~10 Myr) clusters. We also roughly estimated the age of RZ Psc based on the proper motion of the star using the Tycho-2 catalog. We found that the star has escaped from its assumed birthplace near to the Galactic plane about 30-40 Myr ago. We conclude that RZ Psc is a post-UXOr star, and its sporadic eclipses are caused by material from the debris disk.

KW - stars: individual: RZ Psc

U2 - 10.1051/0004-6361/201014889

DO - 10.1051/0004-6361/201014889

M3 - Article

VL - 524

SP - A8-A11

JO - ASTRONOMY & ASTROPHYSICS

JF - ASTRONOMY & ASTROPHYSICS

SN - 0004-6361

ER -