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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
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.

the sky above us