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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

Possible link between relativistic jets and accretion disk found in the giant quasar 4C+74.26

4C+74.26 is a quasar located about 1.4 billion light years away from us - one of the few quasars with giant radio lobes spreading across millions light years. An team of researchers led by Dr. Gopal Bhatta from the Jagiellonian University in Kraków studied the source using multifrequency observations from the ground and space based telescopes. The team discovered that the optical emission delayed behind radio emission by ~250 days. The authors proposed that the delay may indicate a scenario in which flux modulations arose due to magnetic disruptions at the innermost regions of the accretion disk. Such a lag between two emission bands is relatively rarely observed and it could help in understating the most challenging issues in modern astrophysics. More...

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