出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：Compact galactic and extragalactic radio sources can be imaged with an unsurpassed angular
resolution of a few ten micro-arcseconds, adopting the observing technique of global millimeter
VLBI. Here, we present the Global Millimeter VLBI Array (GMVA) and discuss its present
performance. We show and discuss new results obtained with the GMVA for individual and partially
archetypal radio sources with prominent VLBI jets (e.g. 3C 120, CygnusA,M87, 3C 454.3,
NRAO150). The variety of observed effects range from jet propagation and bending, partial foreground
absorption in the nucleus, and jet component ejection after major flares to new and very
small (15−20 Schwarzschild radii) upper limits to the jet base of M87. We also discuss the future
development of mm-VLBI at 3mm and towards shorter wavelengths, and make suggestions
for possible improvements.
