UB
U. Bach
Authored
6 records found
Probing the innermost regions of AGN jets and their magnetic fields with RadioAstron
IV. The quasar 3C 345 at 18 cm: Magnetic field structure and brightness temperature
Context. Supermassive black holes in the centres of radio-loud active galactic nuclei (AGN) can produce collimated relativistic outflows (jets). Magnetic fields are thought to play a key role in the formation and collimation of these jets, but the details are much debated. Aims.
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RadioAstron gravitational redshift experiment
Status update
A test of a cornerstone of general relativity, the gravitational redshift effect, is currently
being conducted with the RadioAstron spacecraft, which is on a highly eccentric orbit
around Earth. Using ground radio telescopes to record the spacecraft signal, synchronized
to its ul
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Radioastron observations of the quasar 3C 273
A challenge to the brightness temperature limit
Inverse Compton cooling limits the brightness temperature of the radiating plasma to a maximum of 1011.5 K. Relativistic boosting can increase its observed value, but apparent brightness temperatures much in excess of 1013 K are inaccessible using ground-based very long baseline
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We present an approach to testing the gravitational redshift effect using the RadioAstron satellite. The experiment is based on a modification of the Gravity Probe A scheme of nonrelativistic Doppler compensation and benefits from the highly eccentric orbit and ultra-stable atomi
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We present an approach to testing the gravitational redshift effect using the RadioAstron satellite. The experiment is based on a modification of the Gravity Probe A scheme of nonrelativistic Doppler compensation and benefits from the highly eccentric orbit and ultra-stable atomi
...
We present an approach to testing the gravitational redshift effect using the RadioAstron satellite. The experiment is based on a modification of the Gravity Probe A scheme of nonrelativistic Doppler compensation and benefits from the highly eccentric orbit and ultra-stable atomi
...