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2篇 您的检索式:作者名="A.A.Kuznetsov"
    题名 作者 年代 出处 被引量
1X-Ray and Ultraviolet Flares on AT Microscopii Observed by AstroSat显示文摘We present observations of the active M-dwarf binary AT Mic(dM4.5e+dM4.5e)obtained with the orbital observatory Astro Sat.During 20 ks of observations,in the far-ultraviolet(130-180 nm)and soft X-ray(0.3-7 keV)spectral ranges,we detected both quiescent emission and at least five flares on different components of the binary.The X-ray flares were typically longer than and delayed(by 5-6 minutes)with respect to their ultraviolet counterparts,in agreement with the Neupert effect.Using X-ray spectral fits,we estimated the parameters of the emitting plasma.The results indicate the presence of a hot multi-thermal corona with average temperatures in the range of~7-15 MK and emission measure of~(2.9-4.5)×10^(52)cm^(-3);both the temperature and the emission measure increased during the flares.The estimated abundance of heavy elements in the corona of AT Mic is considerably lower than at the Sun(~0.18-0.34 of the solar photospheric value);the coronal abundance increased during the flares due to chromospheric evaporation.The detected flares had the energies of~10^(31)-10^(32)erg;the energy-duration relations indicate the presence of magnetic fields stronger than in typical solar flares.A.A.Kuznetsov R.R.Karakotov K.Chandrashekhar D.Banerjee 2023Research in Astronomy and Astrophysics2023,23,1:0
2Photonuclear reactions on stable isotopes of selenium at bremsstrahlung end-point energies of 10-23 MeV显示文摘In this study,experiments were performed at bremsstrahlung end-point energies of 10-23 MeV with the beam from the MT-25 microtron using theγ-activation technique.The experimental values of relative yields were compared with theoretical results obtained on the basis of TALYS with the standard parameters and the combined model of photonucleon reactions.Including isospin splitting in the combined model of photonucleon reactions allows describing experimental data on reactions with proton escape in the energy range from 10 to 23 MeV.Therefore,taking into account isospin splitting is necessary for a correct description of the decay of the giant dipole resonance.F.A.Rasulova N.V.Aksenov S.I.Alekseev R.A.Aliev S.S.Belyshev I.Chuprakov N.Yu.Fursova A.S.Madumarov J.H.Khushvaktov A.A.Kuznetsov B.S.Yuldashev 2024Chinese Physics C2024,48,2:0
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