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Study of the Carbon Star T Draconis
Tatarnikov, A. M.; Shenavrin, V. I.; Zheltoukhov, S. G. +2 more
We present the results of the infrared photometric observations in the $JHKLM$ bands and infrared spectroscopic observations in the range 1-2.5 $µ$m for the carbon Mira star T Dra performed from 2019 to 2023. An analysis of the photometric observations shows the presence of both pulsational brightness fluctuations with an amplitude falling f…
Humps on the Profiles of the Radial-Velocity Distribution and the Age of the Galactic Bar
Melnik, A. M.; Podzolkova, E. N.
We studied the model of the Galaxy with a bar which reproduces well the distributions of the observed radial, VR, and azimuthal, VT, velocities derived from the Gaia DR3 data along the Galactocentric distance R. The model profiles of the distributions of the velocity VR demonstrate a periodic increase and the forma…
Parameters of the Possible Companion of the Neutron Star toward the Supernova Remnant G315.4–2.30
Pakhomov, Yu. V.
Based on low-resolution (