Zobrazeno 1 - 10
of 70
pro vyhledávání: '"Oleg Malkov"'
Publikováno v:
Galaxies, Vol 12, Iss 5, p 65 (2024)
The aim of this work is to establish the present accuracy and convergence of available estimates of galactic extinction. We determine the galactic interstellar extinction in selected high-latitude areas of the sky based on Gaia DR3 astrometry and pho
Externí odkaz:
https://doaj.org/article/7546837964d44ab28073b0c876236e6a
Autor:
Oleg Malkov
Publikováno v:
Galaxies, Vol 11, Iss 5, p 98 (2023)
The recently discovered Gaia BH1 binary system, a Sun-like star and a dark object (presumably a black hole), may significantly change our understanding of the population of binaries. The paper presents the components mass ratio (q) distributions of b
Externí odkaz:
https://doaj.org/article/b63587ef522c423a82606a50dbd1eb95
Publikováno v:
Anais da Academia Brasileira de Ciências, Vol 93, Iss suppl 1 (2021)
Abstract Astronomy is entering an era of mega-data that will render conventional research methods as well as data and visual analytics tools ineffective. The Square Kilometre Array (SKA) drives one of the most significant big data challenges of the n
Externí odkaz:
https://doaj.org/article/ec1c9bad69eb40fc9082f335eed322f1
Autor:
Oleg Malkov, Sergey Karpov, Dana Kovaleva, Sergey Sichevsky, Dmitry Chulkov, Olga Dluzhnevskaya, Alexey Kniazev, Areg Mickaelian, Alexey Mironov, Jayant Murthy, Alexey Sytov, Gang Zhao, Aleksandr Zhukov
Publikováno v:
Galaxies, Vol 7, Iss 1, p 7 (2018)
Results of comparison of Gaia DR2 parallaxes with data derived from a combined analysis of 2MASS (Two Micron All-Sky Survey), SDSS (Sloan Digital Sky Survey), GALEX (Galaxy Evolution Explorer), and UKIDSS (UKIRT Infrared Deep Sky Survey) surveys in f
Externí odkaz:
https://doaj.org/article/b0f485b3c6e946228cff4f4e04e70ea6
Publikováno v:
Data, Vol 3, Iss 4, p 39 (2018)
Binary star DataBase (BDB) is the database of binary/multiple systems of various observational types. BDB contains data on physical and positional parameters of 260,000 components of 120,000 stellar systems of multiplicity 2 to more than 20, taken fr
Externí odkaz:
https://doaj.org/article/909ad0d39c4b49d88452854c053b637b
Autor:
Oleg Malkov, Alexey Kniazev
Publikováno v:
Open Astronomy. 31:327-332
We have the estimated masses of components of visual binaries from their spectral classification. We have selected pairs in which the less massive component looks more evolved. Spectral observations of some of these pairs were made, and at least one
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e0f3b9f44982e40a14fffaa45eb212eb
https://doi.org/10.1515/astro-2022-0192
https://doi.org/10.1515/astro-2022-0192
Publikováno v:
Open Astronomy. 31:106-109
One of the important sources for independent determination of stellar masses is eclipsing binaries with components on the main sequence, and with observable spectral lines of both components. The parameters of such stars are used to construct the mas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::69921c68326c8edf7b67083ac3d6e750
https://doi.org/10.1515/astro-2022-0013
https://doi.org/10.1515/astro-2022-0013
Publikováno v:
Open Astronomy. 32
In accordance with the principles of open science, the results of the research should remain available for further investigations and practical interaction with them in the research community. Such results include collected initial and obtained data,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d55ac57fad844b4d97710c33ec5b0691
https://doi.org/10.1515/astro-2022-0215
https://doi.org/10.1515/astro-2022-0215
Autor:
Oleg Malkov, Igor Pavlyuchenkov
This research was performed on the technological feasibility of manufacturing the multiple thread milling cutter flutes based on their mathematical and experimental simulation and studying possibility of manufacturing a prototype thread milling cutte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::076671d87cf9c70e679fd4d05b721ea5
https://doi.org/10.21203/rs.3.rs-2158812/v1
https://doi.org/10.21203/rs.3.rs-2158812/v1
Publikováno v:
The European Physical Journal Special Topics. 230:2193-2205
The distribution of visual interstellar extinction $A_V$ has been mapped in selected areas over the Northern sky, using available LAMOST DR5 and Gaia DR2/EDR3 data. $A_V$ was modelled as a barometric function of galactic latitude and distance. The fu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6142592be7c9212e714bc09c00c0e497
https://doi.org/10.1140/epjs/s11734-021-00210-0
https://doi.org/10.1140/epjs/s11734-021-00210-0