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Вязко-конвективная неустойчивость ламинарных кеплеровских тонких дисков
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Malanchev K., Postnov K., Шакура Н. И.
Language:
Russian
In book
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
Липунова Г. В., Malanchev K., В кн. : Аккреционные процессы в астрофизике. : М. : Физматлит, 2016.
В главе 1 (авторы — Г.В.Липунова, К.Л.Маланчев) в рамках стандартной модели описаны вывод уравнений дисковой аккреции, основы феноменологической теории турбулентной вязкости, свойства тонких аккреционных дисков, их структура в радиальном и верти- кальном направлениях. Приведены аналитические решения основного уравнения эволюции вязкого нестационарного аккреционного диска для неограниченных дисков и дисков в двойных системах, размеры которых ограничены полостью ...
Added: October 25, 2017
Шакура Н. И., Postnov K., Липунова Г. В. et al., М. : Физматлит, 2016
Предлагаемая читателю книга содержит наиболее важные и принципиальные разделы современной теории дисковой и квази-сферической аккреции на черные дыры и замагниченные нейтронные звезды. Последовательно излагается расчет структуры стандартной модели стационарной дисковой аккреции (альфа-модель). Показано, как из сравнения теории нестационарной дисковой аккреции с данными наблюдений нестационарных рентгеновских источников получаются оценки основных параметров модели. Излагается методика расчета релятивистских ...
Added: October 25, 2017
Malanchev K. L., Postnov K. A., Shakura N. I., Monthly Notices of the Royal Astronomical Society 2017 P. 410-417
The vertical structure of stationary thin accretion discs is calculated from the energy balance equation with heat generation due to microscopic ion viscosity η and electron heat conductivity κ, both depending on temperature. In the optically thin discs it is found that for the heat conductivity increasing with temperature, the vertical temperature gradient exceeds the ...
Added: October 30, 2017
Oknyansky V. L., Gaskell C. M., Huseynov N. A. et al., Monthly Notices of the Royal Astronomical Society 2017 Vol. 467 No. 2 P. 1496-1504
Optical and near-infrared photometry, optical spectroscopy, and soft X-ray and UV monitoring of the changing-look active galactic nucleus NGC 2617 show that it continues to have the appearance of a type-1 Seyfert galaxy. An optical light curve for 2010-2016 indicates that the change of type probably occurred between 2010 October and 2012 February and was ...
Added: October 30, 2017
Lipunova G. V., Malanchev K. L., Monthly Notices of the Royal Astronomical Society 2017 Vol. 468 No. 4 P. 4735-4747
We investigate the viscous evolution of the accretion disc in 4U 1543-47, a black hole binary system, during the first 30 d after the peak of the 2002 burst by comparing the observed and theoretical accretion rate evolution \dot{M}(t). The observed \dot{M}(t) is obtained from spectral modelling of the archival Proportional Counter Array aboard the ...
Added: October 30, 2017
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
Kulagin V., Dunham D. W., Tsvetkov V. Y., International Journal of Astrophysics and Space Science 2013 No. 1(3) P. 12-15
The article analyzes the near-Earth space as a future habitat for humankind. This article investigates the factors affecting the location in this environment. We estimate the boundaries of space and related space. The article highlights the main features of the near-Earth space as a human-friendly environment. ...
Added: February 12, 2014
Leonid Surin, Physical Chemistry Chemical Physics 2019 Vol. 21 P. 3440-3445
The ground state of He–HCO+ is investigated using a recently developed double resonance technique,
consisting of a rotational transition followed by a vibrational transition into a dissociative state. In order
to derive precise predictions for the rotational states, the high resolution infrared predissociation
spectroscopy of the v1 C–H stretching mode is revisited. Eleven pure rotational transitions are measured
via ...
Added: November 12, 2018
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
М. : РИИС ФИАН, 2015
The conference was held in the form of lectures by leading scientists, oral and poster presentations of young scientists and students of physical specialties, as well as leaders of innovative structures for the purpose of mutual acquaintance with the new results of fundamental research on a wide range of areas in physics, the prospects and ...
Added: November 25, 2015
Safonov A. A., Safonova M., Коломиец А. В. et al., М. : Юрайт, 2018
Современному в меру образованному и уважающему себя человеку необходимо иметь представление о глобальном устройстве окружающего его мира. Изучая космическое пространство, мы имеем уникальную возможность заглянуть в далекое прошлое или будущее, не имея машины времени. В учебном пособии кратко рассматриваются теоретические основы общего курса астрономии: основные исторические факты развития науки, раскрытие методов и средств астрономических исследований, ...
Added: September 19, 2018
Borisyak M., Усвятцов М., Mulhearn M. J. et al., Journal of Physics: Conference Series 2017 Vol. 3 No. 898 P. 1-8
The CRAYFIS experiment proposes to use privately owned mobile phones as a ground detector array for Ultra High Energy Cosmic Rays. Upon interacting with Earth’s atmosphere, these events produce extensive particle showers which can be detected by cameras on mobile phones. A typical shower contains minimally-ionizing particles such as muons. As these particles interact with ...
Added: June 16, 2017
Lutovinov A., Monthly Notices of the Royal Astronomical Society: Letters 2018 Vol. 479 No. 1 P. L134-L138
We report on the monitoring of the final stage of the outburst from the first Galactic ultraluminous X-ray pulsar Swift J0243.6+6124, which reached ˜40 Eddington luminosities. The main aim of the monitoring program with the Swift/XRT telescope was to measure the magnetic field of the neutron star using the luminosity of transition to the `propeller' ...
Added: November 1, 2018
Isaev E., Kornilov V., Математическая биология и биоинформатика 2013 Т. 8 № 1 С. 49-65
Today we have the problem of big science data. The information collecting in science experiments, especially in bioinformatics and astrophysics grows in amazing rate. In this paper we consider special program techniques and computer technologies used for work with superlarge volumes of data. Also, we discuss the state of affairs with the big data in ...
Added: March 3, 2013
Стадничук Е. М., Dolgonosov M., Нозик А. А. et al., JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 2021 Vol. 126 Article 035278
Relativistic runaway electron avalanches (RREAs) are generally accepted as a source of thunderstorms gamma ray radiation. Avalanches can multiply in the electric field via the relativistic feedback mechanism based on processes with gamma rays and positrons. This study shows that a non-uniform electric field geometry can lead to the new RREAs multiplication mechanism—“reactor feedback,” due ...
Added: May 24, 2023
Н. Новгород : Изд-во ННГУ им. Н.И. Лобачевского, 2014
В сборник включены материалы докладов научной конференции, проходившей
на радиофизическом факультете ННГУ с 12 по 16 мая 2014 г. Доклады охватывают
основные научные направления, развиваемые кафедрами факультета. Работы
выполнены сотрудниками, студентами, магистрантами и аспирантами ННГУ и
других организаций радиофизического и технического профиля. Печатается по
решению Ученого Совета радиофизического факультета ННГУ в рамках
выполнения Программы развития Нижегородского государственного университета
им. Н.И. Лобачевского как ...
Added: January 25, 2017
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
Shelov-Kovedyaev F. V., В кн. : Херсонесский сборник: Сборник научных трудов. Выпуск 23. Вып. 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
Egor Stadnichuk, Свечникова Е., Atmospheric Research 2022 Vol. 277 Article 106329
Relativistic runaway electron avalanches (RREA) occurring in thunderstorm large-scale electric fields are one of the sources of atmospheric gamma radiation. Relativistic feedback is the generation of RREAs by positrons or backscattered gamma rays of the previously produced RREAs. In strong electric fields, relativistic feedback can make RREAs self-sustainable that hypothetically can cause a terrestrial gamma-ray flash (TGF). This paper introduces ...
Added: May 24, 2023
Oknyansky V., Malanchev Konstantin L., Gaskell C. M., , in : Revisiting narrow-line Seyfert 1 galaxies and their place in the Universe (NLS1-2018), 9-13 April 2018, Padova Botanical Garden, Italy. Issue 328: Proceedings of Science.: Trieste : Scuola Internazionale Superiore di Studi Avanzati (SISSA), 2018. Ch. 12. P. 1-6.
Two major challenges to unification schemes for active galactic nuclei (AGN) activity are the existence of Narrow-Line Seyfert 1s (NLS1s) and the existence of changing-look (CL) AGNs. AGNs can drastically change their spectral appearance in the optical (changing their Seyfert type) and/or in the X-ray region. We illustrate the CL phenomenon with our multi-wavelength monitoring ...
Added: October 26, 2018
Лапинов А. В., Lapinova S. A., Петров Л. Ю. et al., , in : Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X. Vol. 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
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
Chulkova G., Королев М. Ю., Петрова Е. Б., Преподаватель XXI век 2023 Т. 1 № 1 С. 71-83
The article provides a brief overview of issues that should be taught to students. The criteria for selecting this material were the problems of 21st century astronomy formulated by scientists. In addition, practical applications of modern astronomy, which play a significant role in many areas of society, are discussed. Almost all major astronomical instruments and ...
Added: November 25, 2023
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