A5061594590- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Gamma-ray bursts and supernovae
- Astrophysical Phenomena and Observations
- Astronomical Observations and Instrumentation
- Field-Flow Fractionation Techniques
- Advanced Thermodynamic Systems and Engines
- Chemical Reactions and Isotopes
- Optical and Acousto-Optic Technologies
- Earthquake Detection and Analysis
- Astrophysics and Cosmic Phenomena
- Antenna Design and Optimization
- Atmospheric Ozone and Climate
- Spectroscopy and Laser Applications
- Luminescence and Fluorescent Materials
- Laser Design and Applications
- Atmospheric and Environmental Gas Dynamics
- Advanced Sensor Technologies Research
- Gyrotron and Vacuum Electronics Research
- Soil Moisture and Remote Sensing
- Nanoplatforms for cancer theranostics
- Porphyrin and Phthalocyanine Chemistry
Lomonosov Moscow State University
2016-2024
Heidelberg University
2023-2024
Astronomical Institute of the Slovak Academy of Sciences
2020
Special Astrophysical Observatory
2018
Context. The Orion Molecular Cloud complex, one of the nearest (D = 406 pc) and most extensively studied massive star-forming regions, is ideal for constraining physics stellar feedback, but its ~12 deg diameter on sky requires a dedicated approach to mapping ionized gas structures within around nebula. Aims. Sloan Digital Sky Survey (SDSS-V) Local Volume Mapper (LVM) new optical integral field unit (IFU) that will map Milky Way Group galaxies, covering 4300 2 with LVM Instrument (LMV-I)....
We present a sample of 66 galaxies belonging to the equatorial part (Dec.= -7$^o$, +7$^o$) large so called Eridanus void (after Fairall 1998). The are selected as be separated from luminous ($M_{\rm B} < M_{\rm B}^{*} +1$), delineating void, by more than 2 Mpc. Our main goal is study systematically evolutionary parameters (metallicity and gas content) compare galaxy properties with their counterparts residing in denser environments. Besides general parameters, compiled mainly literature, we...
We present HI 21cm and optical observations of UGC 3672 which is located near the centre nearby Lynx-Cancer void. find that consists an approximately linearly aligned triplet gas rich dwarfs with large scale velocity continuity along axis. The faintest component extremely gas-rich (MHI/LB ~ 17) also metal deficient (12+log(O/H) 7.0). metallicity this dwarf close to 'floor' observed in star forming galaxies. Low resolution images show galaxy inside a common envelope, fairly regular, disk like...
We present the second part of results on-going project searching for and studying eXtremely Metal-Poor (XMP, adopted as those with Z(gas) <~ Zo/30, or 12+log(O/H) 7.21~dex) very gas-rich blue dwarfs in voids.They were first identified course 'unbiased' study galaxy population nearby Lynx-Cancer void. These rare unusual galaxies seem to be best proxies so-called Very Young Galaxies (VYGs) defined recently model simulations by Tweed et al. To date, 16 preselected void XMP candidates, we...
BODIPY chromophores (4,4-difluoro-4-bora-3a,4a-diaza-s-indacene) are one of the most versatile fluorophores which commonly used in a variety scientific fields. The combination excellent photophysical properties with possibility easy chemical modification structure, and photostability determines application biomedicine, photocatalysis, analytical chemistry materials science. This review summarizes approaches to synthesis BODIPY, discussing both classical recently-published synthetic...
In the framework of an ongoing project aimed at searching for and studying eXtremely Metal-Poor (XMP) very gas-rich blue dwarfs in nearby voids, we conducted spectroscopy with 11-m Southern African Large Telescope (SALT) 26 candidates, preselected first paper this series (PEPK19). For 23 them, detected Oxygen lines, allowing us to estimate gas O/H ratio. ten oxygen abundance is found be low, range 12+log(O/H)=6.95-7.30 dex. Of those, four void have 12+log(O/H) < 7.19, or Z Zo/30. majority...
The low-mass low-surface brightness (LSB) disc galaxy Arakelian 18 (Ark 18) resides in the Eridanus void and because of its isolation represents an ideal case to study formation evolution mechanisms such a type. Its complex structure consists extended blue LSB bright central elliptically-shaped part hosting massive off-centered star-forming clump. We present in-depth Ark based on observations with SCORPIO-2 long-slit spectrograph scanning Fabry-Perot interferometer at Russian 6-m telescope...
ABSTRACT In the framework of ongoing project, aimed at systematical studying galaxies in nearby voids, we conducted spectroscopy with Southern African Large Telescope (SALT) 62 objects from Nearby Void Galaxy (NVG) sample. They include 8 remaining 60 pre-selected candidates to eXtremely Metal-Poor (XMP) dwarfs, two known void XMP dwarfs and 52 residing within Local Volume. For 47 obtained spectra diverse quality. 42 them, detected Hydrogen Oxygen lines that allowed us get estimates O/H...
ABSTRACT We investigated the ionized and atomic gas kinematics excitation state in central region of ongoing star formation nearby low-metallicity dwarf galaxy Sextans B. The analysis is based on new observations performed H α emission line with high resolution (R ∼ 16 000) scanning Fabry–Perot interferometer at 6-m BTA Special Astrophysical Observatory Russian Academy Sciences telescope, long-slit spectral 9.2-m SALT 2.5-m Caucasian Mountain Sternberg Astronomical Institute Moscow State...
ABSTRACT We introduce a project aimed at systematically searching for eXtremely Metal-Poor (XMP) very gas-rich blue dwarfs in voids the nearby Universe. Several such galaxies were first identified course of an unbiased study galaxy population Lynx-Cancer void. These rare and unusual appear to be best proxies so-called Very Young Galaxies defined recently model simulations by Tweed et al. (2018). discuss main properties 10 prototype objects residing formulate criteria search similar other...
We present the first results of a project aimed at searching for gas accretion events and interactions between late-type galaxies in void environment. The is based on long-slit spectroscopic scanning Fabry-Perot interferometer observations performed with SCORPIO SCORPIO-2 multimode instruments Russian 6-m telescope, as well archival multiwavelength photometric data. In paper series we describe sample 18 oxygen abundances that fall below reference `metallicity-luminosity' relation, or...
We investigated the ionised and atomic gas kinematics excitation state in central region of ongoing star formation nearby low-metallicity dwarf galaxy Sextans B. The analysis is based on new observations performed Ha emission line with high resolution ($R \sim 16000$) scanning Fabry-Perot interferometer at 6-m BTA SAO RAS telescope, long-slit spectral 9.2-m SALT 2.5-m CMO SAI MSU telescopes. Strong non-circular motions detected studied regions probably resulted from off-plane impact stellar...
The Orion Molecular Cloud complex, one of the nearest (D = 406 pc) and most extensively studied massive star-forming regions, is ideal for constraining physics stellar feedback, but its ~12 deg diameter on sky requires a dedicated approach to mapping ionized gas structures within around nebula. Sloan Digital Sky Survey (SDSS-V) Local Volume Mapper (LVM) new optical integral field unit (IFU) that will map Milky Way Group galaxies, covering 4300 deg^2 with LVM Instrument. We showcase emission...
ABSTRACT We present and discuss the results of Giant Metrewave Radio Telescope H i 21-cm line mapping for five isolated low-mass (M$_{\rm bary}$$\sim$(2–8)$\times 10^7$ M$\odot$) eXtremely Metal Poor dwarfs [12+$\log$(O/H) = 7.13–7.28], selected from nearby void galaxy sample. All studied show disturbed morphology in maps with angular resolutions $\sim 11$ to 40\,{\rm arcsec}$. examine velocity field relative orientation their stellar gas body spins. overall non-equilibrium state possible...
DDO68 is a star-forming (SF) dwarf galaxy residing in nearby void. Its gas metallicity among the lowest known local Universe, with parameter 12+log(O/H) range of 6.96-7.3 dex. Six its SF regions are located or near so-called 'Northern Ring', which Hubble Space Telescope (HST) images reveal many luminous young stars. We present for these (Knots) results optical monitoring 35 epochs during years 2016--2023. The data was acquired 6m (BTA) and 1m telescopes Special Astrophysical Observatory 2.5m...
We present and discuss the results of Giant Metrewave Radio Telescope (GMRT) HI 21-cm line mapping for five isolated low-mass (M_bary ~(2--8)*10^7 Mo) eXtremely Metal Poor (XMP) dwarfs [12+log(O/H)=7.13-7.28], selected from Nearby Void Galaxy (NVG) sample. All studied void show disturbed morphology in maps with angular resolutions ~11" to ~40". examine velocity field relative orientation their stellar gas body spins. overall non-equilibrium state possible origin evolution dwarfs. The most...
In the framework of ongoing project, aimed at systematical studying galaxies in nearby voids, we conducted spectroscopy with Southern African Large Telescope (SALT) 62 objects from Nearby Void Galaxy (NVG) sample. They include 8 remaining 60 preselected candidates to eXtremely Metal-Poor (XMP) dwarfs, two known void XMP dwarfs and 52 residing within Local Volume. For 47 obtained spectra diverse quality. 42 them, detected Hydrogen Oxygen lines that allowed us get estimates O/H observed HII...
Abstract Half-dozen of extreme representatives void dwarf galaxy population were found in our study evolutionary status a hundred galaxies the nearby Lynx-Cancer void. They are very gas-rich, extremely low-metallicity [7.0 < 12 + log( O/H ) ∼ 7.3] objects, with blue colours outer parts. The indicate ages oldest visible stellar one to few Gyr. all intrinsically faint, mostly Low Surface Brightness dwarfs, M B range –9.5 m –14 . Thus, their finding is subject severe observational selection....