VLBI observations of 12 compact radio sources north of declination 70 deg
Abstract
Models of the structure of 12 compact radio sources with declinations greater than 70 deg are presented, based on VLBI measurements at 5 GHz. At least 7 of these sources are BL Lac objects and 6 of them contain more than 75% of their total flux density at 5 GHz in a region smaller than about 5 milliarcsec. These sources may also be used to establish an almost absolute reference frame.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- April 1982
- Bibcode:
- 1982A&A...108..157E
- Keywords:
-
- Astrometry;
- Bl Lacertae Objects;
- Radio Sources (Astronomy);
- Very Long Base Interferometry;
- Particle Flux Density;
- Radio Astronomy;
- X Ray Sources;
- Astronomy