58 citations · 391 across the 32 of their papers we have counts for
33 papers
Noctilucent Clouds Modulated by Strong 5-day Planetary Wave in 2025: Amplitudes, Phases and Altitudes Based on Ground-Based Observations and Satellite Temperature Data
Oleg S. Ugolnikov, Ilya S. Yankovsky, Nikolay N. Pertsev +12
During the summer season of 2025, noctilucent clouds (NLC) were observed at the latitudes 55-60N from the late May until the late August. A distinct 5-day periodicity in their occu…
Evidence for symbiotic nature of 2MASS J21012803+4555377
A. M. Tatarnikov, A. A. Tatarnikova, N. A. Maslennikova +3
Just less than 300 symbiotic stars are currently known in the Galaxy. The population synthesis methods predict that this amount should be 10--100 times larger. In recent years, sev…
Disk in the circumstellar envelope of carbon Mira V Cygni
Boris S. Safonov, Sergey G. Zheltoukhov, Andrey M. Tatarnikov +2
AGB stars are the primary source of dust and complex molecules in the interstellar medium. The determination of outflow parameters is often hindered by the unknown geometry of the…
Five-years Altitude Statistics of Noctilucent Clouds Based on Multi-Site Wide-Field Camera Survey
Oleg S. Ugolnikov, Nikolay N. Pertsev, Vladimir I. Perminov +14
The results of simultaneous measurements of noctilucent clouds (NLC) position in a number of ground-based locations are presented. Observational data of 14 bright NLC events over 5…
TESS photometry of the nova eruption in V606 Vul: asymmetric photosphere and multiple ejections?
Kirill V. Sokolovsky, Elias Aydi, Konstantin Malanchev +70
Lightcurves of many classical novae deviate from the canonical "fast rise - smooth decline" pattern and display complex variability behavior. We present the first TESS-space-photom…
Recurrent Symbiotic Nova T Coronae Borealis Before Outburst
N. A. Maslennikova, A. M. Tatarnikov, A. A. Tatarnikova +5
The results of photometric and spectral observations of T CrB obtained in a wide range of wavelengths in 2011-2023 are presented. We use the near-IR light curves to determine a new…
The Post-AGB Star IRAS 07253-2001: Pulsations, Long-Term Brightness Variability and Spectral Peculiarities
N. P. Ikonnikova, M. A. Burlak, A. V. Dodin +5
The observations and comprehensive study of intermediate initial mass stars at the late stages of evolution, and after the asymptotic giant branch (AGB) in particular, are of cruci…
TOI 4201 b and TOI 5344 b: Discovery of Two Transiting Giant Planets Around M Dwarf Stars and Revised Parameters for Three Others
J. D. Hartman, G. Á. Bakos, Z. Csubry +62
We present the discovery from the TESS mission of two giant planets transiting M dwarf stars: TOI 4201 b and TOI 5344 b. We also provide precise radial velocity measurements and up…
Orbital parameters and activity of ZZ Tau -- a low mass young binary with circumbinary disc
A. Belinski, M. Burlak, A. Dodin +5
We present the results of our new observations of the young binary ZZ Tau with a circumbinary disc. The system was found to consist of two coeval (age Myr) classical T Tauri s…
FG Sge: new multicolor photometry and short-term dust shell clearing in 2019
V. P. Arkhipova, N. P. Ikonnikova, V. I. Shenavrin +6
We present the results of a new stage of the long-term photometric study of FG Sge which is a quickly evolving central star of the planetary nebula Hen 1-5. Our new observations ca…
Near-infrared detection of H flows in the core of Mon R1 association
T. Yu. Magakian, A. M. Tatarnikov, T. A. Movsessian +1
We report the discovery of 4 new H jets in Mon R1 star-forming region on the images obtained with the 2.5-m telescope of the Caucasian Mountain Observatory of SAI MSU through t…
Near-IR and X-ray Variability of Cyg X-3: Evidence for a Compact IR Source and Complex Wind Structures
Igor I. Antokhin, Anatol M. Cherepashchuk, Eleonora A. Antokhina +1
We study near-infrared (JHK) and X-ray light curves of Cyg X-3 obtained with the 2.5-m telescope of the Caucasian Mountain Observatory of MSU SAI and collected from RXTE ASM and MA…
Photometric and spectroscopic analysis of LBV candidate J004341.84+411112.0 in M31
A. Sarkisyan, O. Sholukhova, S. Fabrika +4
We study Luminous Blue Variable (LBV) candidate J004341.84+411112.0 in the Andromeda galaxy. We present optical spectra of the object obtained with the 6-m telescope of SAO RAS. Th…
Multi-Wavelength Monitoring and Reverberation Mapping of a Changing Look Event in the Seyfert Galaxy NGC 3516
V. L. Oknyansky, M. S. Brotherton, S. S. Tsygankov +26
We present the results of photometric and spectroscopic monitoring campaigns of the changing look AGN NGC 3516 carried out in 2018 to 2020 covering the wavelength range from the X-…
The formation of the Milky Way halo and its dwarf satellites: a NLTE-1D abundance analysis. IV. Segue 1, Triangulum II, and Coma Berenices UFDs
T. M. Sitnova, L. I. Mashonkina, A. M. Tatarnikov +6
We present atmospheric parameters and abundances for chemical elements from carbon to barium in metal-poor stars in Segue 1 (seven stars), Coma Berenices (three stars), and Triangu…
Anomaly detection in the Zwicky Transient Facility DR3
K. L. Malanchev, M. V. Pruzhinskaya, V. S. Korolev +11
We present results from applying the SNAD anomaly detection pipeline to the third public data release of the Zwicky Transient Facility (ZTF DR3). The pipeline is composed of 3 stag…
A revision of the vdB 130 cluster stellar content based on GAIA DR2 Data. Interstellar extinction toward the Cyg OB1 supershell
T. G. Sitnik, A. S. Rastorguev, A. A. Tatarnikova +3
Two star-forming regions are studied: the young embedded open cluster vdB 130 and the protocluster neighbourhood observed in the head and tail of the cometary molecular cloud locat…
RW Aur B: a modest UX Ori type companion of the famous primary
A. Dodin, S. Lamzin, P. Petrov +3
The secondary of the famous young binary RW Aur is much less studied than the primary. To compensate this shortcoming, we present here the results of UBVRIJHK photometric, VRI pola…
A flare in the optical spotted in the changing-look Seyfert NGC 3516
D. Ilic, V. Oknyansky, L. C. Popovic +14
We present observations from the short-term intensive optical campaign (from Sep2019 to Jan2020) of the changing-look Seyfert NGC 3516. This active galactic nucleus is known to hav…
Near-Infrared Photometry of Superthin Edge-on Galaxies
D. Bizyaev, A. M. Tatarnikov, N. I. Shatsky +3
We perform near-infrared photometry of a large sample of 49 superthin edge-on galaxies. These galaxies are selected based on optical photometry because of high radial-to-vertical s…
Optical, J, and K light curves of XTE J1118+480 = KV UMa: the mass of the black hole and the spectrum of the non-stellar component
A. M. Cherepashchuk, N. A. Katysheva, T. S. Khruzina +3
Optical, J, and K photometric observations of the KV UMa black hole X-ray nova in its quiescent state obtained in 2017-2018 are presented. A significant flickering within light cur…
Star-forming regions at the periphery of the supershell surrounding the Cyg OB1 association. II. ISM kinematics and YSOs in the star cluster vdB 130 region
T. G. Sitnik, O. V. Egorov, T. A. Lozinskaya +4
We present an observational study of small-scale feedback processes operating in the star-forming region located in the wall of the expanding supershell around the Cyg OB1 associat…
Study of variable stars associated with maser sources: G025.65+1.05
A. M. Sobolev, A. P. Bisyarina, S. Yu. Gorda +1
We report variation of K-band infrared (IR) emission in the vicinity of the G025.65+1.05 water and methanol maser source. New observational data were obtained with 2.5m telescope o…
Analysis of colour and polarimetric variability of RW Aur A in 2010-2018
A. Dodin, K. Grankin, S. Lamzin +6
Results of photometry and polarimetry of a young star RW Aur A observed during unprecedented long and deep (up to mag) dimming events in 2010-11 a…