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Дата изменения: Unknown Дата индексирования: Sun Apr 10 11:36:14 2016 Кодировка: Поисковые слова: dust disk |
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Supercritical accretion disk in SS433 |
Russian version |
SAO researchers have discovered that supercritical accretion disks eject
hot gas with a velocity of a few thousand kilometers per second.
The supercritical regime of accretion onto black holes is very important
for astrophysics.
In the first half-billion years just after our Universe was born,
supermassive black holes (quasars) began to appear and grow in centers
of young galaxies.
In such a "short" period they accumulated a huge mass of a few billion
masses of the Sun. This is possible only in the supercritical accretion
regime. So far, nobody was able to observe the process of fast quasar
growth, because it ejects such a huge mass of gas and dust that it is
not possible to see the quasar itself. However, there is a micro-copy
of those young quasars in our Milky Way Galaxy - SS433. That is why it
is very important to study this unique object.
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Fig.1. The spectra of SS433 were obtained with the 6-meter BTA telescope (Russia) and the 8-meter Subaru telescope (Hawaii) Fig.2. The first computer model of the supercritical-disk wind |