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Astrophysical Seminar (11 November 2021, 11:00)

Опубликовано: 08/11/2021

The seminar will be held in a mixed mode

1) Speaker: N.N. Chugai (INASAN)

Title: “Efficiency of cosmic ray acceleration in supernovae IIn”

Abstract: A dominant fraction of cosmic rays (CR) with energies less than 1 PeV is accelerated in shock waves of supernovae and supernova remnants. Yet neither theoretically nor observationally the conversion efficiency of the shock wave kinetic energy into the CR is estimated. I propose to recover the CR acceleration efficiency in supernovae IIn from the Halpha spectral line formed in a dense circumstellar gas. Method is based on the effect of the velocity increase of the circumstellar gas in a preshock zone due to the pressure of a relativistic precursor formed by the CR accelerated in the shock wave.

2) Speaker: N.E. Piskunov (INASAN; Uppsala University)

Title: “First observations of transiting exoplanets with the new infrared spectrometer CRIRES+ at the 8m ESO telescope.”

Abstract: see Russian version

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