The Pearson-Readhead Survey from Space
We are using the VSOP mission to observe a complete sample of Pearson-Readhead survey sources at 4.8 GHz to determine core brightness temperatures and pc-scale jet properties.
Radio↗
Engineering topics
Piner, B.
Publications and source records attributed to Piner, B..
The Sub-Parsec Structure of Accretion Disks as Revealed by VLBI Imaging of Free-Free Absorption
The physical conditions in the inner parsec of accretion disks believed to orbit the central black holes in active galactic nuclei can be probed by imaging the absorption of background radio emission by ionized gas in the disk.
Active Galaxies Accretion Disks Interferometry↗
VSOP Observations of a Sub-Parsec Accretion Disk
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VLBI VSOP Active Galaxies Interferometry Accretion↗
VSOP and Ground-Based VLBI Imaging of the TEV Blazar Markarian 421 at Multiple Epochs
We present thirty VLBI images of the Tev blazar Markarian 421 (1101+384) at fifteen epochs spanning the time range from 1994 to 1997, and at six different frequencies form 2.3 to 43 GHz.
VSOP VLBI Blazars↗
High Resolution VLBA Observations of NGC 4261
The VLBA's high angular resolution at 22 and 43 GHz allows the nuclei of nearby radio galaxies to be imaged with very high linear resolution. This is the scale on which absorption by the dense ionized inner regions of nuclear accretion disk should be detected.
Interferometry↗
The Radio Jets and Accretion Disk in NGC 4261
The structure of AGN accretion disks on sub-parsec scales can be probed through free-free absorption of synchrotron emission from the base of symmetric radio jets.
radio jets accretion disk NGC AGN↗
Geodetic and Space VLBI Observations of Egret Blazars
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VLBI Observations EGRET telescope Compton Gamma-Ra↗
Observations of Pearson-Readhead Survey Sources Using VSO and the EVN
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VSOP space VBLI observations Pearson-Readhead EVN↗