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Giant Stellar Arcs as the imprint of Precessing Gamma Jets by Gamma-Ray Bursts
Yuri Efremov, Daniele Fargion
Precessing Gamma Jets, originated by Neutron Stars or Black Holes, may blaze to the observer leading to Gamma Bursts (GRBs) and Soft Gamma repeaters (SGRs). The thin gamma jet is b…
Space Positronium Detection by Radio Measurements
V. Burdyuzha, Ph. Durouchoux, V. Kauts
The possibility of positronium detection at radio wavelengths is investigated in detail. For orthopositronium, the fine structure lines of the n = 2 level (1.62 cm, 2.30 cm and 3.4…
The Forming of the Cosmological Constant
Vladimir Burdyuzha, Olga Lalakulich, Yuri Ponomarev +1
The problem of the physical nature and the cosmological constant genesis is discussed. This problem can't be solved in terms of the current quantum field theory which operates with…
Superfluid critical temperature in 3D Fermi gas with repulsion
D. V. Efremov, M. S. Mar'enko, M. A. Baranov +1
The critical temperature of a superfluid phase transition in a Fermi gas with repulsive interaction is found. The influence of a magnetic field on the transition is analyzed. The e…
Primordial Black Hole Binaries as a Source of Gamma-Ray Bursts and of a High-Frequent Gravitational Radiation
J. N. Abdurashitov, V. E. Yants, C. V. Parfenov
Ultracompact primordial black hole binaries with masses > 10^{16} g are considered. If PBHB's contribute significant part of the dark matter of the Galaxy one can expect an existen…
Antiproton transfer from antiprotonic Helium to noble gas contaminants
G. V. Margagliotti, G. Pauli, L. Santi +3
The state dependent quenching mechanism of metastable antiprotonic He atoms by contaminants is suggested to explain existing experimental data. The effect of antiproton transfer fr…
Reflection and noise in Cygnus X-1
M. Gilfanov, E. Churazov, M. Revnivtsev
We analyzed RXTE/PCA observations of Cyg X-1 from 1996-1998. We found a tight correlation between the characteristic noise frequencies (e.g. the break frequency nu_br) and the spec…
Gamma Ray Bursts versus OB Associations: do they trigger star formation?
Yu. N. Efremov, S. Ehlerova, J. Palous
We discuss differences in shapes, expansion velocities and fragmentation times of structures created by an energy deposition from a single Gamma Ray Burst (GRB) or an OB associatio…
Structural phase transitions and sound velocity anomalies in La(1-x)Sr(x)MnO3
Yu. P. Gaidukov, N. P. Danilova, N. A. Vassilieva +1
The sound velocities dependencies on temperature V(T) were measured by means of resonance method have on the thin plates of quasimonocrystalline manganites La(1-x)Sr(x)MnO3. Result…
Frequency resolved spectroscopy of Cyg X-1: fast variability of the Fe K_alpha line
M. Revnivtsev, M. Gilfanov, E. Churazov
We studied the frequency resolved energy spectra of Cyg X--1 during the standard low (hard) spectral state using the data of the Rossi X-Ray Timing Explorer. We found that the rela…
The nature of SN 1997D: low-mass progenitor and weak explosion
Nikolai N. Chugai, Victor P. Utrobin
We analyzed the spectra and light curve of the peculiar type II-P supernova 1997D to recover ejecta parameters. The optimal hydrodynamical model of SN 1997D, which meets observatio…
Long-Term Variability of the Hard X-ray Source GRS 1758-258: GRANAT/SIGMA Observations
S. I. Kuznetsov, M. R. Gilfanov, E. M. Churazov +13
The results of GRANAT/SIGMA hard X-ray observations of GRS 1758-258 in 1990-1998 are presented. The source lies at ~5\arcdeg from the Galactic Center and was within the SIGMA field…
c-axis Tunneling in Nb/Au/YBaCuO Structures
P. V. Komissinski, G. A. Ovsyannikov, N. A. Tulina +1
We present the experimental results for Nb/Au/YBaCuO structures, in which the current flows along (001) direction of YBaCuO film. The theoretical evaluations show, that at the expe…
Profile instabilities of the millisecond pulsar PSR J1022+1001
M. Kramer, K. M. Xilouris, F. Camilo +6
We present evidence that the integrated profiles of some millisecond pulsars exhibit severe changes that are inconsistent with the moding phenomenon as known from slowly rotating p…