Dust torus formed by particles ejected from a celestial body at an arbitrary point of its elliptic orbit     

Sergei A. Orlov  Konstantin V. Kholshevnikov 《Celestial Mechanics and Dynamical Astronomy》2013,116(1):35-52

Dust comnplexes make one of the components of the Solar System. The surface shape of a typical dust complex consisting of particles ejected by a celestial body is found analytically, under reasonable assumptions (the main one being the smallness of perturbations). Parametric equations of the surface are obtained. The main properties of the surface are established and studied. Singular points are found, and the topological type of the surface as a whole and in the vicinity of the singular points (one conic points and one constriction) is examined.  相似文献   

Analyzing the characteristics of phase-shift keyed signals applied to the measurement of an electron concentration profile using the radiophysical model of the ionosphere     

Alsatkin  S. S.  Medvedev  A. V.  Kushnarev  D. S. 《Geomagnetism and Aeronomy》2009,49(7):1022-1027

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Nature of the X-ray Source in Supernova Remnant RCW103     

Sergei B. Popov 《Astrophysics and Space Science》2000,274(1-2):285-290

I discuss the nature of the compact X-ray source in the center of the supernova remnant RCW 103. Several models, based on the accretion onto a compact object are briefly discussed. I show that it is more likely that the central X-ray source is an accreting neutron star than an accreting black hole. I also argue that models of a disrupted binary system consisting of an old accreting neutron star and a new one observed as a 69-ms pulsar are most favored. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

Reply to comment by F. H. Cornet on 'Large-scale in situ permeability tensor of rocks from induced microseismicity'     

Sergei A. Shapiro  Pascal Audigane  & Jean-Jacques Royer 《Geophysical Journal International》2000,140(2):470-473

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Spectroscopic Redshift Determination for a Sample of Distant Quasars Detected by the SRG Observatory Based on RTT-150 Observations. II     

Bikmaev  I. F.  Irtuganov  E. N.  Nikolaeva  E. A.  Sakhibullin  N. A.  Gumerov  R. I.  Sklyanov  A. S.  Glushkov  M. V.  Khamitov  I. M.  Borisov  V. D.  Burenin  R. A.  Zaznobin  I. A.  Krivonos  R. A.  Lyapin  A. R.  Medvedev  P. S.  Meshcheryakov  A. V.  Sazonov  S. Yu.  Sunyaev  R. A.  Khorunzhev  G. A.  Gilfanov  M. R. 《Astronomy Letters》2021,47(5):277-290

Astronomy Letters - Results of the spectroscopic observations at the 1.5-m Russian–Turkish telescope for another group of 12 X-ray sources discovered by the eROSITA telescope onboard the SRG...  相似文献   

Spectroscopic Redshift Measurements for Galaxy Clusters from the Lockman Hole Survey with the eROSITA Telescope Onboard the SRG Observatory     

Zaznobin  I. A.  Burenin  R. A.  Lyapin  A. R.  Khorunzhev  G. A.  Afanasiev  V. L.  Grokhovskaya  A. A.  Dodonov  S. N.  Eselevich  M. V.  Uklein  R. I.  Bikmaev  I. F.  Khamitov  I. M.  Gilfanov  M. R.  Lyskova  N. S.  Medvedev  P. S.  Sunyaev  R. A. 《Astronomy Letters》2021,47(3):141-149

Astronomy Letters - We present the first results of our program of optical observations for galaxy clusters from the Lockman Hole X-ray survey with the eROSITA telescope onboard the SRG space...  相似文献   

Optical Spectroscopy of SRG/eROSITA Objects with 2.5-m Telescope at the Caucasus Mountain Observatory of the SAI MSU     

Dodin  A. V.  Potanin  S. A.  Shatsky  N. I.  Belinski  A. A.  Atapin  K. E.  Burlak  M. A.  Egorov  O. V.  Tatarnikov  A. M.  Postnov  K. A.  Belvedersky  M. I.  Burenin  R. A.  Gilfanov  M. R.  Medvedev  P. S.  Meshcheryakov  A. V.  Sazonov  S. Yu.  Khorunzhev  G. A.  Sunyaev  R. A. 《Astronomy Letters》2020,46(7):429-438

Astronomy Letters - Based on observations with the new transient double-beam spectrograph (TDS) at the 2.5-m telescope of the Caucasus Mountain Observatory of SAI MSU, we have determined the types...  相似文献   

Optical Identification of Four Hard X-ray Sources from the INTEGRAL Sky Surveys     

Karasev  D. I.  Sazonov  S. Yu.  Tkachenko  A. Yu.  Khorunzhev  G. A.  Krivonos  R. A.  Medvedev  P. S.  Zaznobin  I. A.  Mereminskiy  I. A.  Burenin  R. A.  Pavlinsky  M. N.  Eselevich  M. V. 《Astronomy Letters》2019,45(12):836-846

Astronomy Letters - We continue the study begun in Karasev et al. (2018) and present the results of our optical identifications of four hard X-ray sources from the INTEGRAL sky surveys. Having...  相似文献   

Bistatic Radar Detection in the Luna-Resurs Mission     

O.?V.?YushkovaEmail author  A.?L.?Gavrik  V.?N.?Marchuk  V.?V.?Yushkov  V.?M.?Smirnov  M.?A.?Laptev  B.?V.?Chernyshev  I.?N.?Dutyshev  V.?P.?Lebedev  A.?V.?Medvedev  A.?A.?Petrukovich 《Solar System Research》2018,52(4):287-300

An overview of radiophysical investigations of the lunar soil and plasma shell by active radar detection with the use of spacecraft is presented. The possibility is analyzed of conducting bistatic measurements using the Irkutsk Incoherent Scattering Radar and the onboard radar system RLK-L which is being developed for the orbital station of the Luna-Resurs mission.  相似文献   

New variable stars from the photographic archive: semi-automated discoveries,attempts at automatic classification and the new field 104 Her     

Sergei V.Antipin  Ignacio Becker  AlexANDer A.Belinski  Darya M.Kolesnikova  Karim Pichara  Nikolay N.Samus  Kirill V.Sokolovsky  Alla V.Zharova  Alexandra M.Zubareva 《天文和天体物理学研究(英文版)》2018,(8)

Using 172 plates taken with the 40-cm astrograph of the Sternberg Astronomical Institute(Lomonosov Moscow University) in 1976–1994 and digitized with a resolution of 2400 dpi, we discovered and studied 275 new variable stars. We present the list of our new variables with all necessary information concerning their brightness variations. As in our earlier studies, the new discoveries show a rather large number of high-amplitude Delta Scuti variables, predicting that many stars of this type remain not detected in the whole sky. We also performed automated classification of the newly discovered variable stars based on the Random Forest algorithm. The results of the automated classification were compared to traditional classification and showed that automated classification was possible even with noisy photographic data. However, further improvement of automated techniques is needed, which is especially important when considering the very large numbers of new discoveries expected from all-sky surveys.  相似文献