Zobrazeno 1 - 10
of 2 502
pro vyhledávání: '"Belyaev , Andrey"'
Autor:
Wang, Yu, Alexeeva, Sofya, Wang, Feng, Liu, Ling, Wu, Yong, Wang, JianGuo, Zhao, Gang, Yakovleva, Svetlana A., Belyaev, Andrey K.
Utilizing a simplified quantum model approach, the low-energy inelastic collision processes between yttrium atoms (ions) and hydrogen atoms have been studied. Rate coefficients corresponding to the mutual neutralization, ion-pair formation, excitatio
Externí odkaz:
http://arxiv.org/abs/2308.07831
A problem of constructing the trajectory of a spacecraft flight to Venus within the framework of a mission including landing of a lander in a given region of the planet's surface is being considered. A new celestial mechanics related method based on
Externí odkaz:
http://arxiv.org/abs/2303.07860
Autor:
Eismont, Natan, Zubko, Vladislav, Belyaev, Andrey, Fedyaev, Konstantin, Zasova, Lyudmila, Gorinov, Dmitry, Simonov, Alexander, Nazirov, Ravil
A problem of determining attainable landing sites on the surface of Venus is an essential part of the Venera-D project aimed to explore the planet using a lander. This problem appears due to the inability for the descent module to land at any point o
Externí odkaz:
http://arxiv.org/abs/2204.10564
Inelastic processes rate coefficients for low-energy Sr + H, Sr$^+$ + H$^-$, Sr$^+$ + H and Sr$^{2+}$ + H$^-$ collisions are calculated using multichannel quantum model approach. 31 scattering channels of SrH$^+$ and 17 scattering channels of SrH are
Externí odkaz:
http://arxiv.org/abs/2203.08629
Autor:
Zubko, Vladislav, Sukhanov, Alexander, Fedyaev, Konstantin, Koryanov, Vsevolod, Belyaev, Andrey
The article focuses on trajectory design to the trans-Neptunian object (90377) Sedna for launch in 2029-2034. Sedna is currently moving to the perihelion at a distance of around 74 au from the Sun. The perihelion passage is estimated to be in 2073-74
Externí odkaz:
http://arxiv.org/abs/2112.13017
Autor:
Bergemann, Maria, Hoppe, Richard, Semenova, Ekaterina, Carlsson, Mats, Yakovleva, Svetlana A., Voronov, Yaroslav V., Bautista, Manuel, Nemer, Ahmad, Belyaev, Andrey K., Leenaarts, Jorrit, Mashonkina, Lyudmila, Reiners, Ansgar, Ellwarth, Monika
Motivated by the controversy over the surface metallicity of the Sun, we present a re-analysis of the solar photospheric oxygen (O) abundance. New atomic models of O and Ni are used to perform Non-Local Thermodynamic Equilibrium (NLTE) calculations w
Externí odkaz:
http://arxiv.org/abs/2109.01143
A simplified analytical approach for determining eclipses of satellites occulted by a celestial body
Autor:
Zubko, Vladislav, Belyaev, Andrey
Publikováno v:
In Acta Astronautica July 2024 220:374-391
Publikováno v:
A&A 631, A43 (2019)
Iron plays a crucial role in studies of late-type stars. In their atmospheres, Fe I is the minority species and its lines are subject to the departures from LTE. In contrast, one believes that LTE is a realistic approximation for Fe II lines. The mai
Externí odkaz:
http://arxiv.org/abs/1908.02478
Publikováno v:
Astronomy Letters, vol. 45, p. 341-352 (2019)
We have updated the Ba II model atom by taking into account the H I impact excitation with the rate coefficients from the quantum-mechanical calculations of Belyaev and Yakovleva (2018). Using high-resolution stellar spectra and the non-local thermod
Externí odkaz:
http://arxiv.org/abs/1906.10600
Autor:
Bergemann, Maria, Gallagher, Andrew J., Eitner, Philipp, Bautista, Manuel, Collet, Remo, Yakovleva, Svetlana A., Mayriedl, Anja, Plez, Bertrand, Carlsson, Mats, Leenaarts, Jorrit, Belyaev, Andrey K., Hansen, Camilla
Manganese (Mn) is a key Fe-group elements, commonly employed in stellar population and nucleosynthesis studies to explore the role of SN Ia. We have developed a new non-local thermodynamic equilibrium (NLTE) model of Mn, including new photo-ionisatio
Externí odkaz:
http://arxiv.org/abs/1905.05200