34 citations · 218 across the 44 of their papers we have counts for
45 papers
First double red giant Algol system with active mass transfer
Mikhail Kovalev, Hailiang Chen, Sufen Guo +7
Double red giant stars are very important for studies of the stability of mass transfer, common-envelope evolution, and the formation of double white dwarfs with short orbital peri…
Photometric and spectral variability of the candidate post-AGB star IRAS 07506-0345
N. P. Ikonnikova, M. A. Burlak, A. V. Dodin
We report photometric and spectroscopic observations of the poorly studied post-AGB candidate IRAS 07506-0345, obtained with the telescopes of the Caucasian Mountain Observatory of…
The curved jet in the young star FN Tau
M. A. Burlak, A. V. Dodin, A. V. Zharova +5
In the vicinity of the young star FN Tau, we have detected a microjet and four Herbig-Haro objects, whose positions and kinematics indicate the presence of a bipolar collimated out…
Anomaly detection in Fink. I. Discovery, follow-up, and classification of unusual sources
M. V. Pruzhinskaya, M. V. Kornilov, A. V. Dodin +19
Modern wide-field time-domain surveys produce alert streams whose scientific potential is often concentrated in rare and unusual events. Efficient discovery therefore requires auto…
Photometric and Spectral Evolution of the Symbiotic Nova HM Sagittae since 2003
N. P. Ikonnikova, V. I. Shenavrin, G. V. Komissarova +2
We present photometric and spectral monitoring of the symbiotic system HM Sge, which consists of a Mira variable with a dust shell and a hot white dwarf ionizing the surrounding ga…
The eruptive young star IRAS 21204+4913
M. A. Burlak, A. V. Dodin, A. V. Zharova +7
The results of photometric, polarimetric, and spectroscopic observations are presented for the young star IRAS 21204+4913, whose visible brightness has increased by $\approx 5^{\rm…
Photometric Analysis of TCP J201712881156589 -- WZ Sge Type Dwarf Nova with Delayed Ordinary Superhumps Emergence
Alexander Tarasenkov, Sergey Shugarov, Natalia Ikonnikova +3
We present the results of photometric analysis of WZ Sge type dwarf nova TCP J201712881156589. This object exhibited an outburst with a large amplitude of magnitudes and…
On the influence of component orbital motion on the photometric variability of DF Tau
M. A. Burlak, K. N. Grankin, A. V. Dodin +6
Based on the analysis of the long-term light curve of the young binary DF Tau spanning approximately 125 years, we infer that its brightness variations are associated with changes…
IRAS 22272+5435 (V354 Lac): Multicolor Photometry of a Variable Carbon-rich post-AGB Star and a Dust Formation Episode
N. P. Ikonnikova, V. I. Shenavrin, G. V. Komissarova +1
We present new UBV photometric observations (2009-2024) of the carbon-rich post-AGB star IRAS 22272+5435 (V354 Lac), combined with our data spanning over 30 years (1991-2024). The…
Broad line region echo from highly accreting intermediate-mass black hole candidate SDSS J144850.08+160803.1. The first probe of intra-night variability and reverberation mapping
Mariia Demianenko, Anton Afanasiev, Evgenii Rubtsov +8
Elusive intermediate-mass black holes (IMBHs) can be used as ``time-squeezing'' machines, enabling studies of AGN geometry via reverberation mapping on much shorter timescales than…
On the causes of brightness variability of the young star BP Tau
M. A. Burlak, K. N. Grankin, A. V. Dodin +6
We have constructed and analysed the secular light curve of BP Tau, a classical T Tauri-type star. Wave-like variations in the average brightness were detected, with an amplitude o…
Optical and X-ray timing analysis of the 2018-2020 outburst and rebrightening of the black-hole transient MAXI J1820+070
M. Fiori, L. Zampieri, A. Burtovoi +15
We report the results of a comprehensive analysis of the multiwavelength (in optical and X-rays) and multitimescale (from months to tenths of a second) variability of the 2018-2020…
The BVRcIc sky brightness of the Caucasian Mountain Observatory of MSU
I. A. Komarova, A. M. Tatarnikov, A. V. Sharonova +4
In this paper we analyse the measurements of the brightness of the night sky above the CMO SAI MSU in the visible and near-infrared range made in 2019-2014. In 2023-2024 the median…
MASTER OT J030227.28+191754.5: an unprecedentedly energetic dwarf nova outburst
Yusuke Tampo, Taichi Kato, Keisuke Isogai +60
We present a detailed study of the MASTER OT J030227.28+191754.5 outburst in 2021-2022, reaching an amplitude of 10.2 mag and a duration of 60 d. The detections of (1) the double-p…
High-resolution spectroscopy of the variable hot post-AGB star LS 4331 (IRAS 17381-1616)
N. P. Ikonnikova, M. Parthasarathy, I. A. Shaposhnikov +2
An analysis of high-resolution () optical spectrum of hot (B1Ibe) post-AGB star LS 4331 (IRAS 17381-1616) is presented. The detailed identification of the observed ab…
Discovery of a hot post-AGB star in Galactic globular cluster E3
R. Kumar, A. Moharana, S. Piridi +8
We report a new hot post-asymptotic giant branch (PAGB) star in the Galactic globular cluster (GC) E3, which is one of the first of the identified PAGB stars in a GC to show a bina…
The jet of BP Tau
A. V. Dodin, S. A. Potanin, M. A. Burlak +6
A strong global magnetic field of young low-mass stars and a high accretion rate are the necessary conditions for the formation of collimated outflows (jets) from these objects. Bu…
Post-AGB candidate IRAS 02143+5852: Cepheid-like variability, three-layer circumstellar dust envelope and spectral features
N. P. Ikonnikova, M. A. Burlak, A. V. Dodin +8
We present the results of multicolour photometry, spectroscopic analysis and spectral energy distribution (SED) modelling for the post-AGB candidat…
ZZ Tau IRS: a low mass UX Ori type star with strong wind
M. A. Burlak, A. V. Dodin, A. V. Zharova +7
The results of photometric, polarimetric and spectroscopic observations of the young star ZZ Tau IRS in the visible and near-infrared bands are presented. Against the continuum of…
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…
Long-term multiwavelength monitoring and reverberation mapping of NGC 2617 during a changing-look event
V. L. Oknyansky, M. S. Brotherton, S. S. Tsygankov +32
We present the results of photometric and spectroscopic monitoring campaigns of the changing look AGN NGC~2617 carried out from 2016 until 2022 and covering the wavelength range fr…
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…
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…