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1.
Interaction of an ejecting pulsar in a binary with a matter surrounding it is considered. Around the pulsar a cavern is formed, and its shape calculated. Non-stationary regime of floating caverns filled with binary radioemission is discussed. This regime can lead to a special radio-burster. It is noticed that in binaries with rather large separation between components a pulsed radioemission from a pulsar can be observable. In this case, the pulsar will be a fine probe for exploration of physical characteristics of a stellar wind from a normal expansion. 相似文献
2.
The present paper is concerned with the spin-up of low-magnetic neutron stars by the accretion of matter onto the star. Calculations have been made for the evolution of the rotation of a neutron star and applied to different stellar models. It is shown that the existence of a millisecond pulsar imposes no restriction on any of the equations of state considered. However, constraints would arise with the possible discovery of third-octave pulsars (with frequencies in excess of 1000 Hz). Predictions are made as to the distribution of bursters over the orbital periods of neutron stars (about half of these having similar orbital periods). It is demonstrated that in the case of continued accretion onto a star, after it has acquired the critical angular frequency allowing no diviation from axial symmetry, specific accretion disks can be formed with a smooth transition into a star. The specific angular momentum is computed for a neutron star for the instant of the attainment of the Oppenheimer-Volkoff limit. 相似文献
3.
V. M. Lipunov E. S. Gorbovskoy V. G. Kornilov V. V. Chazov M. I. Panasyuk S. I. Svertilov I. V. Yashin V. L. Petrov V. V. Kallegaev A. A. Amelushkin D. M. Vlasenko 《Astronomy Reports》2018,62(7):426-435
The results of observations with the MASTER-SHOK robotic wide-field optical cameras onboard the Lomonosov Space Observatory carried out in 2016 are presented. In all, the automated transient detection system transmitted 22 181 images of moving objects with signal-to-noise ratios greater than 5 to the Earth. Approximately 84% of these images are identified with well-known artificial Earth satellites (including repeated images of the same satellite) and fragments of such satellites (space debris), according to databases of known satellites. The remaining 16% of the images are relate to uncatalogued objects. This first experience in optical space-based monitoring of near-Earth space demonstrates the high efficiency and great potential of using large-aperture cameras in space, based on the software and technology of the MASTER robotic optical complexes (the Mobile Astronomical System of TElescope- Robots (MASTER) global network of robotic telescopes of Lomonosov Moscow State University). 相似文献
4.
A special class of type Ia supernovae that is not subject to ordinary and additional intragalactic gray absorption and chemical
evolution has been identified. Analysis of the Hubble diagrams constructed for these supernovae confirms the accelerated expansion
of the Universe irrespective of the chemical evolution and possible gray absorption in galaxies. 相似文献
5.
6.
V. M. Lipunov 《Astrophysics and Space Science》1982,82(2):343-361
The general case of non-radial accretion is assumed to occur in real binary systems containing X-ray pulsars. The structure and the stability of the magnetosphere, the interaction between the magnetosphere and accreted matter, as well as evolution of neutron star in close binary system are examined within the framework of the two-stream model of nonradial accretion onto a magnetized neutron star. Observable parameters of X-ray pulsars are explained in terms of the model considered. 相似文献
7.
Victor G. Kornilov Vladimir M. Lipunov Evgeny S. Gorbovskoy Aleksander A. Belinski Dmitry A. Kuvshinov Natalia V. Tyurina Nikolai I. Shatsky Anatoly V. Sankovich Aleksander V. Krylov Pavel V. Balanutsa Vadim V. Chazov Artem S. Kuznetsov Dmitry S. Zimnuhov Victor A. Senik Andrey G. Tlatov Aleksander V. Parkhomenko Denis V. Dormidontov Vadim V. Krushinsky Ivan S. Zalozhnyh Aleksander A. Popov Sergey A. Yazev Nikolai M. Budnev Kirill I. Ivanov Evgeny N. Konstantinov Oleg A. Gress Oleg V. Chvalaev Vladimir V. Yurkov Yury P. Sergienko Irina P. Kudelina 《Experimental Astronomy》2012,33(1):173-196
Presented paper describes the basic principles and features of the implementation of a robotic network of optical telescopes MASTER, designed to study the prompt (simultaneous with gamma radiation) optical emission of gamma-ray bursts and to perform the sky survey to detect unknown objects and transient phenomena. With joint efforts of Sternberg astronomical institute, High altitude astronomical station of the Pulkovo observatory, Ural state university, Irkutsk state university, Blagoveshchensk pedagogical university, the robotic telescopes MASTER?II near Kislovodsk, Yekaterinburg, Irkutsk and Blagoveshchensk were installed and tested. The network spread over the longitudes is greater than 6?h. A further expansion of the network is considered. 相似文献
8.
Lipunov V. M. Vladimirov V. V. Gorbovskoi E. S. Kuznetsov A. S. Zimnukhov D. S. Balanutsa P. V. Kornilov V. G. Tyurina N. V. Gress O. A. Vlasenko D. M. Gabovich A. M. Yurkov V. V. Kuvshinov D. A. Senik V. A. 《Astronomy Reports》2019,63(4):293-309
Astronomy Reports - The concept of a multi-functional astronomical complex as applied to robotic astronomy networks and systems is formulated. The practical realization of this concept in the... 相似文献
9.
Merging rates for compact binaries (double neutron stars or black holes) are calculated based on modern concepts of binary star evolution. It is found that the first laser interferometers, with rms sensitivities of 10-21 at a frequency of 100 Hz, can detect 10-700 black holes and only 1 neutron star coalescences in a 1-year integration time. The implications of evolutionary effects for the cosmological origin of gamma ray bursts are also discussed. 相似文献
10.
I.E. Panchenko V.M. Lipunov K.A. Postnov M.E. Prokhorov 《Astrophysics and Space Science》1999,265(1-4):51-54
We present the results of the population synthesis of the population ofthe supernovae progenitors. Both single and double
degenerate progenitorsof SN Ia are considered. We compute the cosmic rate histories for SN I,SN II and both classes of SN
Ia, and present them in the form of redshiftand magnitude distributions. These results can be compared with observationaldata,
allowing to estimate the star formation rate history and thecosmological parameters including ωbaryons which cannot beestimated from analysing the Hubble diagrams of supernovae.We find that single degenerate (SD) SN Ia are younger
than double degenerate (DD) ones, and so the SN Ia in elliptical galaxies should be mostly DD.We propose to use the redshift
dependence of relative supernovae rates indifferent types of galaxies, or of different supernovae types forinterpretation
of observations. These relative rates should be lessinfluenced by the selection effects than the absolute ones.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献