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Astronomical Observatory of the Jagiellonian University

Faculty of Physics, Astronomy and Applied Computer Science
Jagiellonian University, Cracow, Poland

ul. Orla 171
30-244 Kraków
POLAND
tel.: +48

12 6238 620

12 6238 629

fax.: +48

12 425 1318

SBS B1646+499: black hole with a jumbled past

Blazars constitute a particular class of so-called active galaxies (AGNs). These exotic objects emit huge amount of energy. Blazars host very masive black holes in their centers, surrounded by accretion discs and toruses. Their high-energy radiation is mostly emitted in collimated streams called jets. The emission of such objects is dominated by the relativistically boosted, non-thermal emission of the jets observed at a small angle to the observer on Earth. In the case of blazar SBS B1646+499, the galaxy activity phase associated with the jet production has already occurred at least twice. The results obtained by astronomers from Cracow are accepted by Astrophysical Journal.
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