Search Publications
Speckle Interferometry with CMOS Detector
Strakhov, I. A.; Safonov, B. S.; Cheryasov, D. V.
In 2022 we carried out an upgrade of the speckle polarimeter (SPP)—the facility instrument of the 2.5-m telescope of the Caucasian Observatory of the SAI MSU. During the overhaul, CMOS Hamamatsu ORCA-Quest qCMOS C15550-20UP was installed as the main detector, some drawbacks of the previous version of the instrument were eliminated. In this paper, …
The Influence of the Bar on the Dynamics of Globular Clusters in the Central Region of the Milky Way. Frequency Analysis of Orbits According to Gaia EDR3 Data
Bobylev, V. V.; Bajkova, A. T.; Smirnov, A. A.
This work is devoted to studying the influence of the bar on the orbital dynamics of globular clusters. The orbits of 45 globular clusters in the central galactic region with a radius of 3.5 kpc were analyzed using spectral dynamics methods in order to identify objects captured by the bar. To form the 6D phase space required for orbit integration,…
B[e] Star CI Camelopardalis in the Optical Range
Burenkov, A. N.; Miroshnichenko, A. S.; Manset, N. +10 more
We report the results of photometric and spectroscopic monitoring of CI Cam within 24 years since its outburst in 1998. Over this time, we found a system component emitting in the He II 4686 Å emission line, on an elliptical orbit with a period of
A New Revision of the Stellar Content and Physical Properties of the Young Open Cluster vdB 130 in the Region of the Stellar Association Cyg OB1 Based on Gaia DR3 Data
Wiebe, D. S.; Rastorguev, A. S.; Sitnik, T. G. +5 more
Based on Gaia DR3 data, a new revision of the stellar content is performed within the
Eight Exoplanet Candidates in SAO Survey
Galazutdinov, G. A.; Beskin, G. M.; Romanyuk, I. I. +15 more
We report eight new exoplanet candidates discovered at the Special Astrophysical Observatory of the Russian Academy of Sciences using the transit technique. Photometric observations were performed with a 50-cm robotic telescope during the second half of 2020. Transits with depths of
Parameters of SU UMa and WZ Sge-Type Dwarf Novae in Quiescent State. I. FL Psc, TY Psc and V455 And
Shimansky, V. V.; Mitrofanova, A. A.; Dudnik, A. A. +2 more
We present the results of model analysis of the optical spectra of SU UMa and WZ Sge-type dwarf novae TY Psc, FL Psc, and V455 And. Spectroscopic observations were carried out at the SAO RAS 6-m BTA telescope in 2013. The selection criterion for the systems under study is their existence in a quiescent state with an optically thin accretion disk a…
Kinematics of the Galactic Disk Based on Open Cluster Data
Popova, M. E.
We study the dependence of the kinematic properties of the subsystems of Galactic open clusters on their ages. It was found that the angular velocity of Galactic rotation in the solar vicinity decreases to 25.6 km s
Bipolar Nebula AFGL 2688 in the System of Post-AGB Star V1610 Cyg
Klochkova, V. G.; Panchuk, V. E.; Yushkin, M. V.
We present a survey of the results of photometric and spectral observations of a nebula AFGL 2688 in the system of post-AGB star V1610 Cyg. Apart from the analysis of the published results, our new spectral observations of the star at the BTA over 2002–2022 are also given consideration. A new understanding of the kinematics of gas and dust in the …
The Interstellar Ti II Distance Scale
Krełowski, J.; Galazutdinov, G. A.; Santander, T. A. +1 more
We measured the equivalent widths (
Spectral Types of Long-Period Double-Lined Eclipsing Binary System Components from Low-Resolution Spectroscopy Data
Berdnikov, L. N.; Kniazev, A. Yu.; Malkov, O. Yu. +5 more
We present the results of spectral observations and consequent analysis of six long-period double-lined eclipsing binaries (DLEBs) with main-sequence (MS) components from a sample formed with the aim of testing the ''mass–luminosity'' relation (MLR) for stars in the