7 research outputs found
Investigation of Non-Stable Processes in Close Binary Ry Scuti
We present results of reanalysis of old electrophotometric data of early type
close binary system RY Scuti obtained at the Abastumani Astrophysical
Observatory, Georgia, during 1972-1990 years and at the Maidanak Observatory,
Uzbekistan, during 1979-1991 years. It is revealed non-stable processes in RY
Sct from period to period, from month to month and from year to year. This
variation consists from the hundredths up to the tenths of a magnitude.
Furthermore, periodical changes in the system's light are displayed near the
first maximum on timescales of a few years. That is of great interest with
regard to some similar variations seen in luminous blue variable (LBV) stars.
This also could be closely related to the question of why RY Sct ejected its
nebula.Comment: 11 pages, 6 figures, 2 table
Results of UBV Photoelectric Observations of the Early-Type Eclipsing Binary System XZ Cep
Results of the three-colour photoelectric observation of the close binary
system XZ Cep, obtained at the Abastumani Astrophysical observatory, are
presented.Comment: 23 pages, 3 figures, 1 tebl
Dynamics of Flow at Concordant Gravel Bed River Confluences: Effects of Junction Angle and Momentum Flux Ratio
Coordinated observations of Cyg X-1 (V1357 Cyg) from 1994â1998 in the commonwealth of independent states
COMET Phase-I Technical Design Report
International audienceThe Technical Design for the COMET Phase-I experiment is presented in this paper. COMET is an experiment at J-PARC, Japan, which will search for neutrinoless conversion of muons into electrons in the field of an aluminum nucleus (â ||â|| conversion, ||â ); a lepton flavor-violating process. The experimental sensitivity goal for this process in the Phase-I experiment is ||â , or 90% upper limit of a branching ratio of ||â , which is a factor of 100 improvement over the existing limit. The expected number of background events is 0.032. To achieve the target sensitivity and background level, the 3.2 kW 8 GeV proton beam from J-PARC will be used. Two types of detectors, CyDet and StrECAL, will be used for detecting the ||â|| conversion events, and for measuring the beam-related background events in view of the Phase-II experiment, respectively. Results from simulation on signal and background estimations are also described