30 citations · 174 across the 12 of their papers we have counts for
12 papers
The compact multiple system HIP 41431
T. Borkovits, J. Sperauskas, A. Tokovinin +4
The nearby (50 pc) K7V dwarf HIP~41431 (EPIC 212096658) is a compact 3-tier hierarchy. Three K7V stars with similar masses, from 0.61 to 0.63 solar, make a triple-lined spectroscop…
Spectroscopic orbits of nearby stars
J. Sperauskas, V. Deveikis, A. Tokovinin
We observed stars with variable radial velocities to determine their spectroscopic orbits. Velocities of 132 targets taken over a time span reaching 30 years are presented. They we…
Variability in Proto-Planetary Nebulae: V. Velocity and Light Curve Analyses of IRAS 17436+5003, 18095+2704, and 19475+3119
Bruce J. Hrivnak, Griet Van de Steene, Hans Van Winckel +2
We have obtained contemporaneous light, color, and radial velocity data for three proto-planetary nebulae (PPNe) over the years 2007 to 2015. The light and velocity curves of each…
Where Are the Binaries? Results of a Long-Term Search for Radial Velocity Binaries in Proto-Planetary Nebulae
Bruce J. Hrivnak, Griet Van de Steene, Hans Van Winckel +3
We present the results of an expanded, long-term radial velocity search (25 yrs) for evidence of binarity in a sample of seven bright proto-planetary nebulae (PPNe). The goal is to…
Spectroscopic variability of IRAS22272+5435
L. Začs, F. Musaev, B. Kaminsky +4
A time series of high-resolution spectra was observed in the optical wavelength region for the bright proto-planetary nebula IRAS22272+5435 (HD235858), along with a simultaneous mo…
A new empirical metallicity calibration for Vilnius photometry
S. Bartasiute, S. Raudeliunas, J. Sperauskas
We present a new calibration of the seven-color Vilnius system in terms of [Fe/H], applicable to F-M stars in the metallicity range -2.8<[Fe/H]<+0.5. We employ a purely empirical a…