Blazars: Achievements And Still Open Issues

Details Blazars: Achievements And Still Open Issues Blazars: Achievements And Still Open Issues

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011xau5.confe..23g&link_type=abstract

"The Second Ferrara Workshop on "X-ray Astrophysics up to 511 keV", held in Ferrara (Italy), September 14 - 16, 2011, article #2

Astronomy and Astrophysics

Astrophysics

Scientific paper

The Fermi satellite is allowing us to make a huge jump in our knowledge of blazars. Together with the Swift satellite and Cerenkov ground based telescope it is now routine what was a dream only a few years ago. We can now well characterize the phenomenology of relativistic jets, and start to attack the difficult questions of jet formation, collimation and content. We can also used them as probes to quantify the amount of IR and optical background radiation, and the amount of cosmic magnetic field. Since they are the most powerful steady sources of the Universe, we can study them also at large redshift, and this is a very fruitful field of research. To this aim, I will enphasize the importance of high energy X-rays, where very powerful blazars are predicted to emit most of their electromagnetic power.

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