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from 30 November 2015 to 2 December 2015
Max-Planck-Institut für Radioastronomie, Bonn, Germany
Europe/Berlin timezone
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Contribution Invited

Max-Planck-Institut für Radioastronomie, Bonn, Germany - 0.02

The Nuclear Structure in Nearby AGN at 3-500 Schwarzschild Radii Resolution

Speakers

  • Dr. Tuomas SAVOLAINEN

Primary authors

Co-authors

Content

The ultra-high angular resolution of RadioAstron space-VLBI observations provides an opportunity to study the relativistic jet structure in nearby radio galaxies at a spatial resolution of only a few to a few hundreds of Schwarzschild radii at centimeter wavelengths. Such observations complement the ground-based mm-VLBI experiments in probing the jet acceleration and collimation zone and offer a unique view of the internal jet structure. The RadioAstron Nearby AGN Key Science Program has carried out space-VLBI imaging of three bright, nearby radio galaxies - M87, Centaurus A and 3C84. We present here an update on the results from this program. We have successfully detected 3C84 on space baselines up to 7 Earth diameters at 6 and 1.3 cm, while M87 was detected on baselines up to 3 Earth diameters at 18 and 6 cm and up to 1 Earth diameter at 1.3 cm. The innermost parsec of the radio galaxy 3C84 has been imaged at both observing bands - with the 1.3 cm data yielding one of the highest resolution space-VLBI images ever made. We will discuss the structures visible in these images, including the jet formation site and a parsec-scale hot spot.