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Crossmatching of high-proper motion L, T, and Y brown dwarfs with large photometric surveys

Avdeeva, Aleksandra S.; Karpov, Sergey V.; Malkov, Oleg Yu.

L, T, and Y brown dwarf (BD) exploration is a topical issue. First, the transition boundary between planets and BDs is not fully understood yet. Second, there is a phenomenon called the L/T-transition. The observed properties of cooler BDs differ significantly from the less cool ones, namely, colors of BDs shift much bluer and, simultaneously, dwa…

A holistic study of the systems V0487 Lac, V0566 Hya, and V0666 Lac

Alenazi, Moqbil S.; Elkhateeb, Magdy M.

A comprehensive photometric study and evolutionary state for the systems V0487 Lac, V0566 Hya, and V0666 Lac were carried out by means of their first photometric observations. New times of minima were estimated from the observed light curves, and first (O-C) curves were established for all systems. The radiative treatment was carried out using a W…

Light curve analysis of main belt asteroids 4747, 5255, 11411, 15433, 17866

Eglitis, Ilgmars; Kristers, Nagainis

The main belt asteroids 4747, 5255, 11411, 15433, and 17866 were studied at the Baldone Astrophysical Observatory in the time span range 2018-2022. The obtained light curve data together with published Minor Planet Center data are analyzed with Fourier series, Lomb-Scargle periodogram, and phase dispersion minimization methods. A plan of analysis …