From Geoscience Australia
JSON format icon JSON RDF format icon RDF ISO19115-3 XML

Systematic effects in apparent proper motion of radio sources

Created 16/10/2025

Updated 16/10/2025

JSON format icon JSON RDF format icon RDF ISO19115-3 XML

The galactocentric rotation of the Solar system generates the systematic effect in proper motions known as 'secular aberration drift'. This tiny effect (about five microseconds per year) in the quasar proper motion can be measured by VLBI. However, the motions of relativistic jets from the active extragalactic nuclei can reach several hundred microseconds per year and mimic the proper motion of the observed radio sources. These apparent motions exceed the secular aberration drift by factor of 10-100. In this paper we search the ways to overcome the difficulties and discuss our estimates of the secular aberration drift using OCCAM software. Paper presented at the 5th General Meeting of International VLBI Service, March, 2008, Saint-Peterburg, Russia

Files and APIs

Tags

Additional Info

Field Value
Title Systematic effects in apparent proper motion of radio sources
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/4f36d635-bb8d-478a-8545-4f80453b7b20
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        112.0,
        -44.0
      ],
      [
        154.0,
        -44.0
      ],
      [
        154.0,
        -9.0
      ],
      [
        112.0,
        -9.0
      ],
      [
        112.0,
        -44.0
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Systematic effects in apparent proper motion of radio sources". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/systematic-effects-in-apparent-proper-motion-of-radio-sources