Astronomy Letters
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Models of Magnetospheric Accretion onto Young Stars in the Absence of Ionization Equilibrium
Astronomy Letters - Tập 48 - Trang 29-37 - 2022
The formation of hydrogen emission lines in the magnetospheres of young stars is considered. The magnetosphere is assumed to be formed by a dipole magnetic field whose axis is aligned with the stellar rotation axis. The radiative transfer in spectral lines is considered in the Sobolev approximation with nonlocal radiative coupling. We have taken into account the effect of gas ionization fraction t......
Multiwavelength Observations of GRB 181201A and Detection of Its Associated Supernova
Astronomy Letters - Tập 46 - Trang 783-811 - 2021
Multicolor photometric observations in the optical band and a comprehensive study in the X-ray, gamma-ray, and radio bands are presented for GRB 181201A and its afterglow. The optical observations began
$${\sim}0.5$$
day after the burst and lasted almost continuously for
......
A method for capturing asteroids into earth satellite orbits
Astronomy Letters - Tập 41 - Trang 442-449 - 2015
At present, the capture of a suitable asteroid into an Earth satellite orbit is proposed as one of the methods for investigating asteroids within the framework of manned missions. Once the asteroid has been transferred to such an orbit, an expedition with the participation of astronauts is planned to the asteroid surface, where research is carried out and asteroid rock samples are selected and sub......
Detection of a coherent oscillation with a 769.63-s period in the intermediate polar EI UMa (PG 0834+488)
Astronomy Letters - Tập 36 - Trang 554-568 - 2010
Recently, it has been shown that the cataclysmic variable EI UMa should be attributed to intermediate polars on the basis of its X-ray spectrum. However, no short-period oscillations with a high degree of coherence typical of intermediate polars could be detected in this star. Therefore, it was suggested to call it a “hidden” intermediate polar. Using a multichannel photometer and a 70-cm telescop......
H2O maser pumping: The effect of quasi-resonance energy transfer in collisions between H2 and H2O molecules
Astronomy Letters - - 2014
Natural spectral bandwidth of electron cyclotron maser emission
Astronomy Letters - Tập 30 - Trang 603-614 - 2004
We studied the spectral properties of the electron cyclotron maser emission generated by anisotropic distributions of fast electrons with power-law magnitude distributions in solar flares. The natural bandwidth of the generated spectral line depends significantly on the angle between the direction of the wave emission and the direction of the magnetic field in the source. In addition, the line ban......
Hệ tứ phân G89-14 - Hệ phân tán kim loại thấp nhất Dịch bởi AI
Astronomy Letters - Tập 35 - Trang 466-471 - 2009
Hệ thống tứ phân G89-14 là một trong những ngôi sao đa thành phần có hàm lượng kim loại thấp nhất với độ phong phú kim loại trong khí quyển [m/H] = −1.9. Kỹ thuật giao thoa điểm tại kính thiên văn BTA 6 mét đã phát hiện rằng G89-14 bao gồm bốn thành phần. Các phép đo độ chênh lệch về độ sáng giữa các thành phần và dữ liệu đã công bố đã cho phép ước lượng khối lượng của chúng: M
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#hệ tứ phân #kim loại thấp #G89-14 #độ phong phú kim loại #động lực học #giao thoa điểm #kính thiên văn BTA
Toroidal Magnetic Chamber ‘‘Tokamak’’ in the Solar Atmosphere: Confinement and Flare Magnetic Energy Release
Astronomy Letters - - 2022
Statistical study of extensive air showers and the question of mass composition
Astronomy Letters - - 2014
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