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Шакура Н. И., Postnov K., Липунова Г. В., Malanchev K., Журавлев В. В., Раздобурдин Д. Н., Кочеткова А. Ю., Ялмарсдоттер Л., Аболмасов П. К., Чашкина А. А. М.: Физматлит, 2016.
S. A. Prokhorenko, S. Yu. Sazonov, Gilfanov M. R. et al., Monthly Notices of the Royal Astronomical Society 2024 Vol. 528 No. 4 P. 5972–5989
We examine the long-term (rest-frame time scales from a few months to ∼20 years) X-ray variability of a sample of 2344 X-ray bright quasars from the SDSS DR14Q Catalogue, based on the data of the SRG/eROSITA All-Sky Survey complemented for ∼7% of the sample by archival data from the XMM-Newton Serendipitous Source Catalogue. We characterise variability by a structure ...
Added: February 1, 2024
Denis A. Grachev, Mikhailov E., Zhikhareva E., Open Astronomy 2023 Vol. 32 No. 1 Article 2022021
Magnetic fields of various astrophysical objects
are described using the dynamo mechanism. Corresponding
equations in the three-dimensional case are quite difficult
to be solved. So, the two-dimensional models can be useful
for such problems. For galactic and accretion discs, it is
convenient to use the no-z approximation. The initial conditions
for the magnetic field have a special interest. It
seems that the ...
Added: March 9, 2023
Солодихина М. В., Solodikhina A., Физика в школе 2023 № 1 С. 59–64
Modern education should be aimed at developing students' critical thinking skills. In the process of learning astronomy, it is important to pay attention to the development of comprehension, argumentation and decision-making skills. To do this, the mastering of the material should be organized in accordance with the scientific method, which can be considered as a ...
Added: January 29, 2023
Gorban A., Мольков С. В., Цыганков С. С. et al., В кн.: XIX Конференция молодых учёных «Фундаментальные и прикладные космические исследования» ИКИ РАН, Москва, 13–15 апреля 2022 г.: М.: ИКИ РАН, 2022. С. 34–36.
Added: December 12, 2022
Gorban A., Lutovinov A., Мольков С. В. et al., Письма в Астрономический журнал 2022 Т. 48 № 12 С. 861–868
Представлены результаты исследования рентгеновского пульсара IGR J21343+4738 по данным наблюдений обсерваториями NuSTAR, Swift и СРГ в широком диапазоне энергий 0.3–79 кэВ. Отсутствие особенностей поглощения в энергетических спектрах источника, как усредненном, так и фазово-разрешенных, позволило оценить верхний и нижний пределы на магнитное поле нейтронной звезды в двойной системе B < 2.5 × 10^11 Гс и B ...
Added: December 12, 2022
Gorban A., Molkov S. V., Tsygankov S. S. et al., , in: Astronomy at the epoch of multimessenger studies. Proceedings of the VAK-2021 conference, Aug 23–28, 2021.: Yanus-K, 2022. P. 279–279.
We present the results of our spectral and timing analysis of the emission from the transient X-ray pulsar XTE
J1946+274 based on observations by the NuSTAR in the broad energy range 0.3–79 keV and Swift/XRT in the range
0.2–10 keV ...
Added: December 12, 2022
Biryukov A., Abolmasov P., Monthly Notices of the Royal Astronomical Society 2021 Vol. 505 No. 2 P. 1775–1786
The rotation of a magnetized accreting neutron star (NS) in a binary system is described by its spin period and two angles: spin inclination α with respect to the orbital momentum and magnetic angle χ between the spin and the magnetic moment. Magnetospheric accretion spins the NS up and adjusts its rotation axis, decreasing α ...
Added: October 31, 2022
Shelov-Kovedyaev F. V., В кн.: Херсонесский сборник: Сборник научных трудов. Выпуск 23Вып. 23.: Севастополь: Государственный историко-археологический музей-заповедник «Херсонес Таврический», 2022. С. 208–222.
The paper presents the detailed publication of the unique instrument in the ancient culture of Chersonesos Tauricus. That’s one of two most ancient arachne in all the Greek world, which can be dated from last quarter of IV B.C. The letters on both sides of the sundial are interpreted as the symbols of degrees in ...
Added: October 29, 2022
Gorban A., Мольков С. В., Цыганков С. С. et al., Письма в Астрономический журнал 2022 Т. 48 № 4 С. 279–289
The results of the broadband spectral and timing study of the transient X-ray pulsar GRO J2058+42 in a wide energy range at a low luminosity Lx ≃ 2.5 × 10^36 erg s^−1 are reported. The data revealed that the pulse profile and pulse fraction of the source are significantly changed in comparison with previous NuSTAR ...
Added: June 16, 2022
A semi-implicit unstructured operator-difference scheme for three-dimensional self-gravitating flows
Kondratyev I., Moiseenko S., Journal of Physics: Conference Series 2021 Vol. 2028 No. 1 Article 012007
A support operators (operator-difference) method has proven itself well for implicit simulations of different astrophysical fluid flows. Following the operator-difference approach, we construct nodal difference analogues of differential operators in Cartesian coordinates, where the conjugacy properties are the same as for original ones. Using the difference operators, we develop an Eulerian semi-implicit gas-dynamical solver with ...
Added: February 3, 2022
Prokhorenko S. A., Sazonov S., Письма в Астрономический журнал 2021 Т. 47 № 8 С. 537–556
Изучается распределение темпов аккреции на сверхмассивные черные дыры в АЯГ местного объема Вселенной (z < 0.15) на основе обзоров неба в близком ИК и жестком рентгеновском диапазонах энергий (2MASS, Swift/BAT). Использование достаточно точных оценок масс черных дыр позволило надежно оценить эддингтоновское отношение λEdd примерно для половины объектов выборки АЯГ, для остальных использовалась более грубая оценка ...
Added: January 26, 2022
Buckley D. A., Mcbride V., Pozanenko A. S. et al., Anais da Academia Brasileira de Ciencias 2021 Vol. 93 Article e20200917
This paper is based on a proposal submitted for a BRICS astronomy flagship program, which was presented at the 2019 meeting of the BRICS Astronomy Working Group, held in Rio de Janeiro from 29 September to 2 October 2019. The future prospects for the detection and study of transient phenomena in the Universe heralds a ...
Added: January 25, 2022
Gorban A., Мольков С. В., Цыганков С. С. et al., Письма в Астрономический журнал 2021 Т. 47 № 6 С. 416–427
We present the results of our spectral and timing analysis of the emission from the transient X-ray pulsar XTE J1946+274 based on the simultaneous NuSTAR and Swift/XRT observations in the broad energy range 0.3–79 keV carried out in June 2018 during a bright outburst. Our spectral analysis has confirmed the presence of a cyclotron absorption ...
Added: November 18, 2021
Nim E., Шаги/Steps 2021 Т. 7 № 4 С. 221–237
The article is devoted to the study of media images of small celestial bodies – comets, asteroids and meteorites. Special attention is paid to the "impact" representation of these space objects, which reflects their probable or occurred collision with the Earth. The article answers a number of questions: since when, in what contexts and images ...
Added: June 22, 2021
Лапинов А. В., Lapinova S. A., Петров Л. Ю. et al., , in: Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XVol. 11453: Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X.: United States of America: SPIE, 2020. Ch. 114532O P. 1–9.
Thanks to the first mm studies on the territory of the former USSR in the early 1960s and succeeding sub-mm measurements in the 1970s - early 1980s at wavelengths up to 0.34 mm, a completely unique astroclimate was revealed in the Eastern Pamirs, only slightly inferior to the available conditions on the Chajnantor plateau in ...
Added: April 11, 2021
Svetlikova I., Калиновский Н. А., Фесенко М. О., Философия. Журнал Высшей школы экономики 2019 Т. 3 № 4 С. 90–112
Proceeding from a fragment of Vasily Rozanov about astronomy, Auguste Comte and horoscopes, our study clarifies the complex ideological relationship between astronomy and astrology in intellectual culture of the turn of the XIX – XX centuries. Both these disciplines were closely related with positivism: the main goal of science— the search for scientific laws — was identified as a ...
Added: May 5, 2020
Zotov L., [б.и.], 2019.
Работа посвящена рассмотрению геофизических процессов, вызывающих движение полюса и изменение длительности суток. Особенное внимание уделено чандлеровскому движению полюса. Разработана методика его выделения и восстановления
геодезического возбуждения. Исследуются атмосферные и океанические возбуждающие функции в чандлеровском диапазоне. С использованием данных по гравитационному полю Земли со спутников GRACE анализируются первые коэффициенты
разложения гравитационного потенциала в аспекте влияния соответствующего перераспределения масс ...
Added: November 29, 2019